R90: Abnormal findings on diagnostic imaging of central nervous system
Codes under R90 (Abnormal findings on diagnostic imaging of central nervous system). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| R90.0 | Intracranial space-occupying lesion found on diagnostic imaging of central nervous system | ✓ |
| R90.0 | Intracranial space-occupying lesion found on diagnostic imaging of central nervous system | ✓ |
| R90.8 | Other abnormal findings on diagnostic imaging of central nervous system | — |
| R90.8 | Other abnormal findings on diagnostic imaging of central nervous system | — |
| R90.81 | Abnormal echoencephalogram | ✓ |
| R90.81 | Abnormal echoencephalogram | ✓ |
| R90.82 | White matter disease, unspecified | ✓ |
| R90.82 | White matter disease, unspecified | ✓ |
| R90.89 | Other abnormal findings on diagnostic imaging of central nervous system | ✓ |
| R90.89 | Other abnormal findings on diagnostic imaging of central nervous system | ✓ |
Frequently asked questions
What is ICD-10-CM code R90?
R90 is an ICD-10-CM category covering Abnormal findings on diagnostic imaging of central nervous system. It contains 10 more specific diagnosis codes, 8 of which are billable.
Is R90 a billable code?
No — R90 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 R90.0 — Intracranial space-occupying lesion found on diagnostic imaging of central nervous system). 8 of the 10 codes under R90 are billable.
What codes fall under R90?
R90 includes R90.0, R90.0, R90.8, R90.8, R90.81, plus 5 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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