ICD-10-CM category
F51: Sleep disorders not due to a substance or known physiological condition
Codes under F51 (Sleep disorders not due to a substance or known physiological condition). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| F51.0 | Insomnia not due to a substance or known physiological condition | — |
| F51.01 | Primary insomnia | ✓ |
| F51.1 | Hypersomnia not due to a substance or known physiological condition | — |
| F51.02 | Adjustment insomnia | ✓ |
| F51.03 | Paradoxical insomnia | ✓ |
| F51.3 | Sleepwalking [somnambulism] | ✓ |
| F51.04 | Psychophysiologic insomnia | ✓ |
| F51.4 | Sleep terrors [night terrors] | ✓ |
| F51.05 | Insomnia due to other mental disorder | ✓ |
| F51.5 | Nightmare disorder | ✓ |
| F51.8 | Other sleep disorders not due to a substance or known physiological condition | ✓ |
| F51.09 | Other insomnia not due to a substance or known physiological condition | ✓ |
| F51.9 | Sleep disorder not due to a substance or known physiological condition, unspecified | ✓ |
| F51.11 | Primary hypersomnia | ✓ |
| F51.12 | Insufficient sleep syndrome | ✓ |
| F51.13 | Hypersomnia due to other mental disorder | ✓ |
| F51.19 | Other hypersomnia not due to a substance or known physiological condition | ✓ |
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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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