ICD-10-CM category
T42: Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs
Codes under T42 (Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| T42.0 | Poisoning by, adverse effect of and underdosing of hydantoin derivatives | — |
| T42.0 | Poisoning by, adverse effect of and underdosing of hydantoin derivatives | — |
| T42.0X | Poisoning by, adverse effect of and underdosing of hydantoin derivatives | — |
| T42.0X | Poisoning by, adverse effect of and underdosing of hydantoin derivatives | — |
| T42.0X1 | Poisoning by hydantoin derivatives, accidental (unintentional) | — |
| T42.0X1 | Poisoning by hydantoin derivatives, accidental (unintentional) | — |
| T42.0X1A | Poisoning by hydantoin derivatives, accidental (unintentional), initial encounter | ✓ |
| T42.0X1A | Poisoning by hydantoin derivatives, accidental (unintentional), initial encounter | ✓ |
| T42.0X1D | Poisoning by hydantoin derivatives, accidental (unintentional), subsequent encounter | ✓ |
| T42.0X1D | Poisoning by hydantoin derivatives, accidental (unintentional), subsequent encounter | ✓ |
| T42.0X1S | Poisoning by hydantoin derivatives, accidental (unintentional), sequela | ✓ |
| T42.0X1S | Poisoning by hydantoin derivatives, accidental (unintentional), sequela | ✓ |
| T42.0X2 | Poisoning by hydantoin derivatives, intentional self-harm | — |
| T42.0X2 | Poisoning by hydantoin derivatives, intentional self-harm | — |
| T42.0X2A | Poisoning by hydantoin derivatives, intentional self-harm, initial encounter | ✓ |
| T42.0X2A | Poisoning by hydantoin derivatives, intentional self-harm, initial encounter | ✓ |
| T42.0X2D | Poisoning by hydantoin derivatives, intentional self-harm, subsequent encounter | ✓ |
| T42.0X2D | Poisoning by hydantoin derivatives, intentional self-harm, subsequent encounter | ✓ |
| T42.0X2S | Poisoning by hydantoin derivatives, intentional self-harm, sequela | ✓ |
| T42.0X2S | Poisoning by hydantoin derivatives, intentional self-harm, sequela | ✓ |
| T42.0X3 | Poisoning by hydantoin derivatives, assault | — |
| T42.0X3 | Poisoning by hydantoin derivatives, assault | — |
| T42.0X3A | Poisoning by hydantoin derivatives, assault, initial encounter | ✓ |
| T42.0X3A | Poisoning by hydantoin derivatives, assault, initial encounter | ✓ |
| T42.0X3D | Poisoning by hydantoin derivatives, assault, subsequent encounter | ✓ |
| T42.0X3D | Poisoning by hydantoin derivatives, assault, subsequent encounter | ✓ |
| T42.0X3S | Poisoning by hydantoin derivatives, assault, sequela | ✓ |
| T42.0X3S | Poisoning by hydantoin derivatives, assault, sequela | ✓ |
| T42.0X4 | Poisoning by hydantoin derivatives, undetermined | — |
| T42.0X4 | Poisoning by hydantoin derivatives, undetermined | — |
| T42.0X4A | Poisoning by hydantoin derivatives, undetermined, initial encounter | ✓ |
| T42.0X4A | Poisoning by hydantoin derivatives, undetermined, initial encounter | ✓ |
| T42.0X4D | Poisoning by hydantoin derivatives, undetermined, subsequent encounter | ✓ |
| T42.0X4D | Poisoning by hydantoin derivatives, undetermined, subsequent encounter | ✓ |
| T42.0X4S | Poisoning by hydantoin derivatives, undetermined, sequela | ✓ |
| T42.0X4S | Poisoning by hydantoin derivatives, undetermined, sequela | ✓ |
| T42.0X5 | Adverse effect of hydantoin derivatives | — |
| T42.0X5 | Adverse effect of hydantoin derivatives | — |
| T42.0X5A | Adverse effect of hydantoin derivatives, initial encounter | ✓ |
| T42.0X5A | Adverse effect of hydantoin derivatives, initial encounter | ✓ |
| T42.0X5D | Adverse effect of hydantoin derivatives, subsequent encounter | ✓ |
| T42.0X5D | Adverse effect of hydantoin derivatives, subsequent encounter | ✓ |
| T42.0X5S | Adverse effect of hydantoin derivatives, sequela | ✓ |
| T42.0X5S | Adverse effect of hydantoin derivatives, sequela | ✓ |
| T42.0X6 | Underdosing of hydantoin derivatives | — |
| T42.0X6 | Underdosing of hydantoin derivatives | — |
| T42.0X6A | Underdosing of hydantoin derivatives, initial encounter | ✓ |
| T42.0X6A | Underdosing of hydantoin derivatives, initial encounter | ✓ |
| T42.0X6D | Underdosing of hydantoin derivatives, subsequent encounter | ✓ |
| T42.0X6D | Underdosing of hydantoin derivatives, subsequent encounter | ✓ |
| T42.0X6S | Underdosing of hydantoin derivatives, sequela | ✓ |
| T42.0X6S | Underdosing of hydantoin derivatives, sequela | ✓ |
| T42.1 | Poisoning by, adverse effect of and underdosing of iminostilbenes | — |
| T42.1 | Poisoning by, adverse effect of and underdosing of iminostilbenes | — |
| T42.1X | Poisoning by, adverse effect of and underdosing of iminostilbenes | — |
| T42.1X | Poisoning by, adverse effect of and underdosing of iminostilbenes | — |
| T42.1X1 | Poisoning by iminostilbenes, accidental (unintentional) | — |
| T42.1X1 | Poisoning by iminostilbenes, accidental (unintentional) | — |
| T42.1X1A | Poisoning by iminostilbenes, accidental (unintentional), initial encounter | ✓ |
| T42.1X1A | Poisoning by iminostilbenes, accidental (unintentional), initial encounter | ✓ |
| T42.1X1D | Poisoning by iminostilbenes, accidental (unintentional), subsequent encounter | ✓ |
| T42.1X1D | Poisoning by iminostilbenes, accidental (unintentional), subsequent encounter | ✓ |
| T42.1X1S | Poisoning by iminostilbenes, accidental (unintentional), sequela | ✓ |
| T42.1X1S | Poisoning by iminostilbenes, accidental (unintentional), sequela | ✓ |
| T42.1X2 | Poisoning by iminostilbenes, intentional self-harm | — |
| T42.1X2 | Poisoning by iminostilbenes, intentional self-harm | — |
| T42.1X2A | Poisoning by iminostilbenes, intentional self-harm, initial encounter | ✓ |
| T42.1X2A | Poisoning by iminostilbenes, intentional self-harm, initial encounter | ✓ |
| T42.1X2D | Poisoning by iminostilbenes, intentional self-harm, subsequent encounter | ✓ |
| T42.1X2D | Poisoning by iminostilbenes, intentional self-harm, subsequent encounter | ✓ |
| T42.1X2S | Poisoning by iminostilbenes, intentional self-harm, sequela | ✓ |
| T42.1X2S | Poisoning by iminostilbenes, intentional self-harm, sequela | ✓ |
| T42.1X3 | Poisoning by iminostilbenes, assault | — |
| T42.1X3 | Poisoning by iminostilbenes, assault | — |
| T42.1X3A | Poisoning by iminostilbenes, assault, initial encounter | ✓ |
| T42.1X3A | Poisoning by iminostilbenes, assault, initial encounter | ✓ |
| T42.1X3D | Poisoning by iminostilbenes, assault, subsequent encounter | ✓ |
| T42.1X3D | Poisoning by iminostilbenes, assault, subsequent encounter | ✓ |
| T42.1X3S | Poisoning by iminostilbenes, assault, sequela | ✓ |
| T42.1X3S | Poisoning by iminostilbenes, assault, sequela | ✓ |
| T42.1X4 | Poisoning by iminostilbenes, undetermined | — |
| T42.1X4 | Poisoning by iminostilbenes, undetermined | — |
| T42.1X4A | Poisoning by iminostilbenes, undetermined, initial encounter | ✓ |
| T42.1X4A | Poisoning by iminostilbenes, undetermined, initial encounter | ✓ |
| T42.1X4D | Poisoning by iminostilbenes, undetermined, subsequent encounter | ✓ |
| T42.1X4D | Poisoning by iminostilbenes, undetermined, subsequent encounter | ✓ |
| T42.1X4S | Poisoning by iminostilbenes, undetermined, sequela | ✓ |
| T42.1X4S | Poisoning by iminostilbenes, undetermined, sequela | ✓ |
| T42.1X5 | Adverse effect of iminostilbenes | — |
| T42.1X5 | Adverse effect of iminostilbenes | — |
| T42.1X5A | Adverse effect of iminostilbenes, initial encounter | ✓ |
| T42.1X5A | Adverse effect of iminostilbenes, initial encounter | ✓ |
| T42.1X5D | Adverse effect of iminostilbenes, subsequent encounter | ✓ |
| T42.1X5D | Adverse effect of iminostilbenes, subsequent encounter | ✓ |
| T42.1X5S | Adverse effect of iminostilbenes, sequela | ✓ |
| T42.1X5S | Adverse effect of iminostilbenes, sequela | ✓ |
| T42.1X6 | Underdosing of iminostilbenes | — |
| T42.1X6 | Underdosing of iminostilbenes | — |
| T42.1X6A | Underdosing of iminostilbenes, initial encounter | ✓ |
| T42.1X6A | Underdosing of iminostilbenes, initial encounter | ✓ |
| T42.1X6D | Underdosing of iminostilbenes, subsequent encounter | ✓ |
| T42.1X6D | Underdosing of iminostilbenes, subsequent encounter | ✓ |
| T42.1X6S | Underdosing of iminostilbenes, sequela | ✓ |
| T42.1X6S | Underdosing of iminostilbenes, sequela | ✓ |
| T42.2 | Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones | — |
| T42.2 | Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones | — |
| T42.2X | Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones | — |
| T42.2X | Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones | — |
| T42.2X1 | Poisoning by succinimides and oxazolidinediones, accidental (unintentional) | — |
| T42.2X1 | Poisoning by succinimides and oxazolidinediones, accidental (unintentional) | — |
| T42.2X1A | Poisoning by succinimides and oxazolidinediones, accidental (unintentional), initial encounter | ✓ |
| T42.2X1A | Poisoning by succinimides and oxazolidinediones, accidental (unintentional), initial encounter | ✓ |
| T42.2X1D | Poisoning by succinimides and oxazolidinediones, accidental (unintentional), subsequent encounter | ✓ |
| T42.2X1D | Poisoning by succinimides and oxazolidinediones, accidental (unintentional), subsequent encounter | ✓ |
| T42.2X1S | Poisoning by succinimides and oxazolidinediones, accidental (unintentional), sequela | ✓ |
| T42.2X1S | Poisoning by succinimides and oxazolidinediones, accidental (unintentional), sequela | ✓ |
| T42.2X2 | Poisoning by succinimides and oxazolidinediones, intentional self-harm | — |
| T42.2X2 | Poisoning by succinimides and oxazolidinediones, intentional self-harm | — |
| T42.2X2A | Poisoning by succinimides and oxazolidinediones, intentional self-harm, initial encounter | ✓ |
| T42.2X2A | Poisoning by succinimides and oxazolidinediones, intentional self-harm, initial encounter | ✓ |
| T42.2X2D | Poisoning by succinimides and oxazolidinediones, intentional self-harm, subsequent encounter | ✓ |
| T42.2X2D | Poisoning by succinimides and oxazolidinediones, intentional self-harm, subsequent encounter | ✓ |
| T42.2X2S | Poisoning by succinimides and oxazolidinediones, intentional self-harm, sequela | ✓ |
| T42.2X2S | Poisoning by succinimides and oxazolidinediones, intentional self-harm, sequela | ✓ |
| T42.2X3 | Poisoning by succinimides and oxazolidinediones, assault | — |
| T42.2X3 | Poisoning by succinimides and oxazolidinediones, assault | — |
| T42.2X3A | Poisoning by succinimides and oxazolidinediones, assault, initial encounter | ✓ |
| T42.2X3A | Poisoning by succinimides and oxazolidinediones, assault, initial encounter | ✓ |
| T42.2X3D | Poisoning by succinimides and oxazolidinediones, assault, subsequent encounter | ✓ |
| T42.2X3D | Poisoning by succinimides and oxazolidinediones, assault, subsequent encounter | ✓ |
| T42.2X3S | Poisoning by succinimides and oxazolidinediones, assault, sequela | ✓ |
| T42.2X3S | Poisoning by succinimides and oxazolidinediones, assault, sequela | ✓ |
| T42.2X4 | Poisoning by succinimides and oxazolidinediones, undetermined | — |
| T42.2X4 | Poisoning by succinimides and oxazolidinediones, undetermined | — |
| T42.2X4A | Poisoning by succinimides and oxazolidinediones, undetermined, initial encounter | ✓ |
| T42.2X4A | Poisoning by succinimides and oxazolidinediones, undetermined, initial encounter | ✓ |
| T42.2X4D | Poisoning by succinimides and oxazolidinediones, undetermined, subsequent encounter | ✓ |
| T42.2X4D | Poisoning by succinimides and oxazolidinediones, undetermined, subsequent encounter | ✓ |
| T42.2X4S | Poisoning by succinimides and oxazolidinediones, undetermined, sequela | ✓ |
| T42.2X4S | Poisoning by succinimides and oxazolidinediones, undetermined, sequela | ✓ |
| T42.2X5 | Adverse effect of succinimides and oxazolidinediones | — |
| T42.2X5 | Adverse effect of succinimides and oxazolidinediones | — |
| T42.2X5A | Adverse effect of succinimides and oxazolidinediones, initial encounter | ✓ |
| T42.2X5A | Adverse effect of succinimides and oxazolidinediones, initial encounter | ✓ |
| T42.2X5D | Adverse effect of succinimides and oxazolidinediones, subsequent encounter | ✓ |
| T42.2X5D | Adverse effect of succinimides and oxazolidinediones, subsequent encounter | ✓ |
| T42.2X5S | Adverse effect of succinimides and oxazolidinediones, sequela | ✓ |
| T42.2X5S | Adverse effect of succinimides and oxazolidinediones, sequela | ✓ |
| T42.2X6 | Underdosing of succinimides and oxazolidinediones | — |
| T42.2X6 | Underdosing of succinimides and oxazolidinediones | — |
| T42.2X6A | Underdosing of succinimides and oxazolidinediones, initial encounter | ✓ |
| T42.2X6A | Underdosing of succinimides and oxazolidinediones, initial encounter | ✓ |
| T42.2X6D | Underdosing of succinimides and oxazolidinediones, subsequent encounter | ✓ |
| T42.2X6D | Underdosing of succinimides and oxazolidinediones, subsequent encounter | ✓ |
| T42.2X6S | Underdosing of succinimides and oxazolidinediones, sequela | ✓ |
| T42.2X6S | Underdosing of succinimides and oxazolidinediones, sequela | ✓ |
| T42.3 | Poisoning by, adverse effect of and underdosing of barbiturates | — |
| T42.3 | Poisoning by, adverse effect of and underdosing of barbiturates | — |
| T42.3X | Poisoning by, adverse effect of and underdosing of barbiturates | — |
| T42.3X | Poisoning by, adverse effect of and underdosing of barbiturates | — |
| T42.3X1 | Poisoning by barbiturates, accidental (unintentional) | — |
| T42.3X1 | Poisoning by barbiturates, accidental (unintentional) | — |
| T42.3X1A | Poisoning by barbiturates, accidental (unintentional), initial encounter | ✓ |
| T42.3X1A | Poisoning by barbiturates, accidental (unintentional), initial encounter | ✓ |
| T42.3X1D | Poisoning by barbiturates, accidental (unintentional), subsequent encounter | ✓ |
| T42.3X1D | Poisoning by barbiturates, accidental (unintentional), subsequent encounter | ✓ |
| T42.3X1S | Poisoning by barbiturates, accidental (unintentional), sequela | ✓ |
| T42.3X1S | Poisoning by barbiturates, accidental (unintentional), sequela | ✓ |
| T42.3X2 | Poisoning by barbiturates, intentional self-harm | — |
| T42.3X2 | Poisoning by barbiturates, intentional self-harm | — |
| T42.3X2A | Poisoning by barbiturates, intentional self-harm, initial encounter | ✓ |
| T42.3X2A | Poisoning by barbiturates, intentional self-harm, initial encounter | ✓ |
| T42.3X2D | Poisoning by barbiturates, intentional self-harm, subsequent encounter | ✓ |
| T42.3X2D | Poisoning by barbiturates, intentional self-harm, subsequent encounter | ✓ |
| T42.3X2S | Poisoning by barbiturates, intentional self-harm, sequela | ✓ |
| T42.3X2S | Poisoning by barbiturates, intentional self-harm, sequela | ✓ |
| T42.3X3 | Poisoning by barbiturates, assault | — |
| T42.3X3 | Poisoning by barbiturates, assault | — |
| T42.3X3A | Poisoning by barbiturates, assault, initial encounter | ✓ |
| T42.3X3A | Poisoning by barbiturates, assault, initial encounter | ✓ |
| T42.3X3D | Poisoning by barbiturates, assault, subsequent encounter | ✓ |
| T42.3X3D | Poisoning by barbiturates, assault, subsequent encounter | ✓ |
| T42.3X3S | Poisoning by barbiturates, assault, sequela | ✓ |
| T42.3X3S | Poisoning by barbiturates, assault, sequela | ✓ |
| T42.3X4 | Poisoning by barbiturates, undetermined | — |
| T42.3X4 | Poisoning by barbiturates, undetermined | — |
| T42.3X4A | Poisoning by barbiturates, undetermined, initial encounter | ✓ |
| T42.3X4A | Poisoning by barbiturates, undetermined, initial encounter | ✓ |
| T42.3X4D | Poisoning by barbiturates, undetermined, subsequent encounter | ✓ |
| T42.3X4D | Poisoning by barbiturates, undetermined, subsequent encounter | ✓ |
| T42.3X4S | Poisoning by barbiturates, undetermined, sequela | ✓ |
| T42.3X4S | Poisoning by barbiturates, undetermined, sequela | ✓ |
| T42.3X5 | Adverse effect of barbiturates | — |
| T42.3X5 | Adverse effect of barbiturates | — |
| T42.3X5A | Adverse effect of barbiturates, initial encounter | ✓ |
| T42.3X5A | Adverse effect of barbiturates, initial encounter | ✓ |
| T42.3X5D | Adverse effect of barbiturates, subsequent encounter | ✓ |
| T42.3X5D | Adverse effect of barbiturates, subsequent encounter | ✓ |
| T42.3X5S | Adverse effect of barbiturates, sequela | ✓ |
| T42.3X5S | Adverse effect of barbiturates, sequela | ✓ |
| T42.3X6 | Underdosing of barbiturates | — |
| T42.3X6 | Underdosing of barbiturates | — |
| T42.3X6A | Underdosing of barbiturates, initial encounter | ✓ |
| T42.3X6A | Underdosing of barbiturates, initial encounter | ✓ |
| T42.3X6D | Underdosing of barbiturates, subsequent encounter | ✓ |
| T42.3X6D | Underdosing of barbiturates, subsequent encounter | ✓ |
| T42.3X6S | Underdosing of barbiturates, sequela | ✓ |
| T42.3X6S | Underdosing of barbiturates, sequela | ✓ |
| T42.4 | Poisoning by, adverse effect of and underdosing of benzodiazepines | — |
| T42.4 | Poisoning by, adverse effect of and underdosing of benzodiazepines | — |
| T42.4X | Poisoning by, adverse effect of and underdosing of benzodiazepines | — |
| T42.4X | Poisoning by, adverse effect of and underdosing of benzodiazepines | — |
| T42.4X1 | Poisoning by benzodiazepines, accidental (unintentional) | — |
| T42.4X1 | Poisoning by benzodiazepines, accidental (unintentional) | — |
| T42.4X1A | Poisoning by benzodiazepines, accidental (unintentional), initial encounter | ✓ |
| T42.4X1A | Poisoning by benzodiazepines, accidental (unintentional), initial encounter | ✓ |
| T42.4X1D | Poisoning by benzodiazepines, accidental (unintentional), subsequent encounter | ✓ |
| T42.4X1D | Poisoning by benzodiazepines, accidental (unintentional), subsequent encounter | ✓ |
| T42.4X1S | Poisoning by benzodiazepines, accidental (unintentional), sequela | ✓ |
| T42.4X1S | Poisoning by benzodiazepines, accidental (unintentional), sequela | ✓ |
| T42.4X2 | Poisoning by benzodiazepines, intentional self-harm | — |
| T42.4X2 | Poisoning by benzodiazepines, intentional self-harm | — |
| T42.4X2A | Poisoning by benzodiazepines, intentional self-harm, initial encounter | ✓ |
| T42.4X2A | Poisoning by benzodiazepines, intentional self-harm, initial encounter | ✓ |
| T42.4X2D | Poisoning by benzodiazepines, intentional self-harm, subsequent encounter | ✓ |
| T42.4X2D | Poisoning by benzodiazepines, intentional self-harm, subsequent encounter | ✓ |
| T42.4X2S | Poisoning by benzodiazepines, intentional self-harm, sequela | ✓ |
| T42.4X2S | Poisoning by benzodiazepines, intentional self-harm, sequela | ✓ |
| T42.4X3 | Poisoning by benzodiazepines, assault | — |
| T42.4X3 | Poisoning by benzodiazepines, assault | — |
| T42.4X3A | Poisoning by benzodiazepines, assault, initial encounter | ✓ |
| T42.4X3A | Poisoning by benzodiazepines, assault, initial encounter | ✓ |
| T42.4X3D | Poisoning by benzodiazepines, assault, subsequent encounter | ✓ |
| T42.4X3D | Poisoning by benzodiazepines, assault, subsequent encounter | ✓ |
| T42.4X3S | Poisoning by benzodiazepines, assault, sequela | ✓ |
| T42.4X3S | Poisoning by benzodiazepines, assault, sequela | ✓ |
| T42.4X4 | Poisoning by benzodiazepines, undetermined | — |
| T42.4X4 | Poisoning by benzodiazepines, undetermined | — |
| T42.4X4A | Poisoning by benzodiazepines, undetermined, initial encounter | ✓ |
| T42.4X4A | Poisoning by benzodiazepines, undetermined, initial encounter | ✓ |
| T42.4X4D | Poisoning by benzodiazepines, undetermined, subsequent encounter | ✓ |
| T42.4X4D | Poisoning by benzodiazepines, undetermined, subsequent encounter | ✓ |
| T42.4X4S | Poisoning by benzodiazepines, undetermined, sequela | ✓ |
| T42.4X4S | Poisoning by benzodiazepines, undetermined, sequela | ✓ |
| T42.4X5 | Adverse effect of benzodiazepines | — |
| T42.4X5 | Adverse effect of benzodiazepines | — |
| T42.4X5A | Adverse effect of benzodiazepines, initial encounter | ✓ |
| T42.4X5A | Adverse effect of benzodiazepines, initial encounter | ✓ |
| T42.4X5D | Adverse effect of benzodiazepines, subsequent encounter | ✓ |
| T42.4X5D | Adverse effect of benzodiazepines, subsequent encounter | ✓ |
| T42.4X5S | Adverse effect of benzodiazepines, sequela | ✓ |
| T42.4X5S | Adverse effect of benzodiazepines, sequela | ✓ |
| T42.4X6 | Underdosing of benzodiazepines | — |
| T42.4X6 | Underdosing of benzodiazepines | — |
| T42.4X6A | Underdosing of benzodiazepines, initial encounter | ✓ |
| T42.4X6A | Underdosing of benzodiazepines, initial encounter | ✓ |
| T42.4X6D | Underdosing of benzodiazepines, subsequent encounter | ✓ |
| T42.4X6D | Underdosing of benzodiazepines, subsequent encounter | ✓ |
| T42.4X6S | Underdosing of benzodiazepines, sequela | ✓ |
| T42.4X6S | Underdosing of benzodiazepines, sequela | ✓ |
| T42.5 | Poisoning by, adverse effect of and underdosing of mixed antiepileptics | — |
| T42.5 | Poisoning by, adverse effect of and underdosing of mixed antiepileptics | — |
| T42.5X | Poisoning by, adverse effect of and underdosing of antiepileptics | — |
| T42.5X | Poisoning by, adverse effect of and underdosing of antiepileptics | — |
| T42.5X1 | Poisoning by mixed antiepileptics, accidental (unintentional) | — |
| T42.5X1 | Poisoning by mixed antiepileptics, accidental (unintentional) | — |
| T42.5X1A | Poisoning by mixed antiepileptics, accidental (unintentional), initial encounter | ✓ |
| T42.5X1A | Poisoning by mixed antiepileptics, accidental (unintentional), initial encounter | ✓ |
| T42.5X1D | Poisoning by mixed antiepileptics, accidental (unintentional), subsequent encounter | ✓ |
| T42.5X1D | Poisoning by mixed antiepileptics, accidental (unintentional), subsequent encounter | ✓ |
| T42.5X1S | Poisoning by mixed antiepileptics, accidental (unintentional), sequela | ✓ |
| T42.5X1S | Poisoning by mixed antiepileptics, accidental (unintentional), sequela | ✓ |
| T42.5X2 | Poisoning by mixed antiepileptics, intentional self-harm | — |
| T42.5X2 | Poisoning by mixed antiepileptics, intentional self-harm | — |
| T42.5X2A | Poisoning by mixed antiepileptics, intentional self-harm, initial encounter | ✓ |
| T42.5X2A | Poisoning by mixed antiepileptics, intentional self-harm, initial encounter | ✓ |
| T42.5X2D | Poisoning by mixed antiepileptics, intentional self-harm, subsequent encounter | ✓ |
| T42.5X2D | Poisoning by mixed antiepileptics, intentional self-harm, subsequent encounter | ✓ |
| T42.5X2S | Poisoning by mixed antiepileptics, intentional self-harm, sequela | ✓ |
| T42.5X2S | Poisoning by mixed antiepileptics, intentional self-harm, sequela | ✓ |
| T42.5X3 | Poisoning by mixed antiepileptics, assault | — |
| T42.5X3 | Poisoning by mixed antiepileptics, assault | — |
| T42.5X3A | Poisoning by mixed antiepileptics, assault, initial encounter | ✓ |
| T42.5X3A | Poisoning by mixed antiepileptics, assault, initial encounter | ✓ |
| T42.5X3D | Poisoning by mixed antiepileptics, assault, subsequent encounter | ✓ |
| T42.5X3D | Poisoning by mixed antiepileptics, assault, subsequent encounter | ✓ |
| T42.5X3S | Poisoning by mixed antiepileptics, assault, sequela | ✓ |
| T42.5X3S | Poisoning by mixed antiepileptics, assault, sequela | ✓ |
| T42.5X4 | Poisoning by mixed antiepileptics, undetermined | — |
| T42.5X4 | Poisoning by mixed antiepileptics, undetermined | — |
| T42.5X4A | Poisoning by mixed antiepileptics, undetermined, initial encounter | ✓ |
| T42.5X4A | Poisoning by mixed antiepileptics, undetermined, initial encounter | ✓ |
| T42.5X4D | Poisoning by mixed antiepileptics, undetermined, subsequent encounter | ✓ |
| T42.5X4D | Poisoning by mixed antiepileptics, undetermined, subsequent encounter | ✓ |
| T42.5X4S | Poisoning by mixed antiepileptics, undetermined, sequela | ✓ |
| T42.5X4S | Poisoning by mixed antiepileptics, undetermined, sequela | ✓ |
| T42.5X5 | Adverse effect of mixed antiepileptics | — |
| T42.5X5 | Adverse effect of mixed antiepileptics | — |
| T42.5X5A | Adverse effect of mixed antiepileptics, initial encounter | ✓ |
| T42.5X5A | Adverse effect of mixed antiepileptics, initial encounter | ✓ |
| T42.5X5D | Adverse effect of mixed antiepileptics, subsequent encounter | ✓ |
| T42.5X5D | Adverse effect of mixed antiepileptics, subsequent encounter | ✓ |
| T42.5X5S | Adverse effect of mixed antiepileptics, sequela | ✓ |
| T42.5X5S | Adverse effect of mixed antiepileptics, sequela | ✓ |
| T42.5X6 | Underdosing of mixed antiepileptics | — |
| T42.5X6 | Underdosing of mixed antiepileptics | — |
| T42.5X6A | Underdosing of mixed antiepileptics, initial encounter | ✓ |
| T42.5X6A | Underdosing of mixed antiepileptics, initial encounter | ✓ |
| T42.5X6D | Underdosing of mixed antiepileptics, subsequent encounter | ✓ |
| T42.5X6D | Underdosing of mixed antiepileptics, subsequent encounter | ✓ |
| T42.5X6S | Underdosing of mixed antiepileptics, sequela | ✓ |
| T42.5X6S | Underdosing of mixed antiepileptics, sequela | ✓ |
| T42.6 | Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6 | Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X | Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X | Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X1 | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional) | — |
| T42.6X1 | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional) | — |
| T42.6X1A | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter | ✓ |
| T42.6X1A | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter | ✓ |
| T42.6X1D | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter | ✓ |
| T42.6X1D | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter | ✓ |
| T42.6X1S | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela | ✓ |
| T42.6X1S | Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela | ✓ |
| T42.6X2 | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm | — |
| T42.6X2 | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm | — |
| T42.6X2A | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter | ✓ |
| T42.6X2A | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter | ✓ |
| T42.6X2D | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter | ✓ |
| T42.6X2D | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter | ✓ |
| T42.6X2S | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela | ✓ |
| T42.6X2S | Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela | ✓ |
| T42.6X3 | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault | — |
| T42.6X3 | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault | — |
| T42.6X3A | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, initial encounter | ✓ |
| T42.6X3A | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, initial encounter | ✓ |
| T42.6X3D | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter | ✓ |
| T42.6X3D | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter | ✓ |
| T42.6X3S | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, sequela | ✓ |
| T42.6X3S | Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, sequela | ✓ |
| T42.6X4 | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined | — |
| T42.6X4 | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined | — |
| T42.6X4A | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter | ✓ |
| T42.6X4A | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter | ✓ |
| T42.6X4D | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter | ✓ |
| T42.6X4D | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter | ✓ |
| T42.6X4S | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, sequela | ✓ |
| T42.6X4S | Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, sequela | ✓ |
| T42.6X5 | Adverse effect of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X5 | Adverse effect of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X5A | Adverse effect of other antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.6X5A | Adverse effect of other antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.6X5D | Adverse effect of other antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.6X5D | Adverse effect of other antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.6X5S | Adverse effect of other antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.6X5S | Adverse effect of other antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.6X6 | Underdosing of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X6 | Underdosing of other antiepileptic and sedative-hypnotic drugs | — |
| T42.6X6A | Underdosing of other antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.6X6A | Underdosing of other antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.6X6D | Underdosing of other antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.6X6D | Underdosing of other antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.6X6S | Underdosing of other antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.6X6S | Underdosing of other antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.7 | Poisoning by, adverse effect of and underdosing of unspecified antiepileptic and sedative-hypnotic drugs | — |
| T42.7 | Poisoning by, adverse effect of and underdosing of unspecified antiepileptic and sedative-hypnotic drugs | — |
| T42.8 | Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8 | Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X | Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X | Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X1 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional) | — |
| T42.8X1 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional) | — |
| T42.8X1A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), initial encounter | ✓ |
| T42.8X1A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), initial encounter | ✓ |
| T42.8X1D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), subsequent encounter | ✓ |
| T42.8X1D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), subsequent encounter | ✓ |
| T42.8X1S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), sequela | ✓ |
| T42.8X1S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), sequela | ✓ |
| T42.8X2 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm | — |
| T42.8X2 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm | — |
| T42.8X2A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, initial encounter | ✓ |
| T42.8X2A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, initial encounter | ✓ |
| T42.8X2D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, subsequent encounter | ✓ |
| T42.8X2D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, subsequent encounter | ✓ |
| T42.8X2S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, sequela | ✓ |
| T42.8X2S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, sequela | ✓ |
| T42.8X3 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault | — |
| T42.8X3 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault | — |
| T42.8X3A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, initial encounter | ✓ |
| T42.8X3A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, initial encounter | ✓ |
| T42.8X3D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, subsequent encounter | ✓ |
| T42.8X3D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, subsequent encounter | ✓ |
| T42.8X3S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, sequela | ✓ |
| T42.8X3S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, sequela | ✓ |
| T42.8X4 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined | — |
| T42.8X4 | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined | — |
| T42.8X4A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, initial encounter | ✓ |
| T42.8X4A | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, initial encounter | ✓ |
| T42.8X4D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, subsequent encounter | ✓ |
| T42.8X4D | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, subsequent encounter | ✓ |
| T42.8X4S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, sequela | ✓ |
| T42.8X4S | Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, sequela | ✓ |
| T42.8X5 | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X5 | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X5A | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter | ✓ |
| T42.8X5A | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter | ✓ |
| T42.8X5D | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter | ✓ |
| T42.8X5D | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter | ✓ |
| T42.8X5S | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, sequela | ✓ |
| T42.8X5S | Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, sequela | ✓ |
| T42.8X6 | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X6 | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants | — |
| T42.8X6A | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter | ✓ |
| T42.8X6A | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter | ✓ |
| T42.8X6D | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter | ✓ |
| T42.8X6D | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter | ✓ |
| T42.8X6S | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, sequela | ✓ |
| T42.8X6S | Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, sequela | ✓ |
| T42.71 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional) | — |
| T42.71 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional) | — |
| T42.71XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter | ✓ |
| T42.71XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter | ✓ |
| T42.71XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter | ✓ |
| T42.71XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter | ✓ |
| T42.71XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela | ✓ |
| T42.71XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela | ✓ |
| T42.72 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm | — |
| T42.72 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm | — |
| T42.72XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter | ✓ |
| T42.72XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter | ✓ |
| T42.72XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter | ✓ |
| T42.72XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter | ✓ |
| T42.72XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela | ✓ |
| T42.72XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela | ✓ |
| T42.73 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault | — |
| T42.73 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault | — |
| T42.73XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounter | ✓ |
| T42.73XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounter | ✓ |
| T42.73XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter | ✓ |
| T42.73XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter | ✓ |
| T42.73XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, sequela | ✓ |
| T42.73XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, sequela | ✓ |
| T42.74 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined | — |
| T42.74 | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined | — |
| T42.74XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter | ✓ |
| T42.74XA | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter | ✓ |
| T42.74XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter | ✓ |
| T42.74XD | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter | ✓ |
| T42.74XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, sequela | ✓ |
| T42.74XS | Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, sequela | ✓ |
| T42.75 | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs | — |
| T42.75 | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs | — |
| T42.75XA | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.75XA | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.75XD | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.75XD | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.75XS | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.75XS | Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.76 | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs | — |
| T42.76 | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs | — |
| T42.76XA | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.76XA | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter | ✓ |
| T42.76XD | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.76XD | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter | ✓ |
| T42.76XS | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
| T42.76XS | Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, sequela | ✓ |
Frequently asked questions
What is ICD-10-CM code T42?
T42 is an ICD-10-CM category covering Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs. It contains 466 more specific diagnosis codes, 324 of which are billable.
Is T42 a billable code?
No — T42 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example T42.0 — Poisoning by, adverse effect of and underdosing of hydantoin derivatives). 324 of the 466 codes under T42 are billable.
What codes fall under T42?
T42 includes T42.0, T42.0, T42.0X, T42.0X, T42.0X1, plus 461 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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