R83: Abnormal findings in cerebrospinal fluid
Codes under R83 (Abnormal findings in cerebrospinal fluid). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| R83.0 | Abnormal level of enzymes in cerebrospinal fluid | ✓ |
| R83.0 | Abnormal level of enzymes in cerebrospinal fluid | ✓ |
| R83.1 | Abnormal level of hormones in cerebrospinal fluid | ✓ |
| R83.1 | Abnormal level of hormones in cerebrospinal fluid | ✓ |
| R83.2 | Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid | ✓ |
| R83.2 | Abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid | ✓ |
| R83.3 | Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid | ✓ |
| R83.3 | Abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid | ✓ |
| R83.4 | Abnormal immunological findings in cerebrospinal fluid | ✓ |
| R83.4 | Abnormal immunological findings in cerebrospinal fluid | ✓ |
| R83.5 | Abnormal microbiological findings in cerebrospinal fluid | ✓ |
| R83.5 | Abnormal microbiological findings in cerebrospinal fluid | ✓ |
| R83.6 | Abnormal cytological findings in cerebrospinal fluid | ✓ |
| R83.6 | Abnormal cytological findings in cerebrospinal fluid | ✓ |
| R83.8 | Other abnormal findings in cerebrospinal fluid | ✓ |
| R83.8 | Other abnormal findings in cerebrospinal fluid | ✓ |
| R83.9 | Unspecified abnormal finding in cerebrospinal fluid | ✓ |
| R83.9 | Unspecified abnormal finding in cerebrospinal fluid | ✓ |
Frequently asked questions
What is ICD-10-CM code R83?
R83 is an ICD-10-CM category covering Abnormal findings in cerebrospinal fluid. It contains 18 more specific diagnosis codes, 18 of which are billable.
Is R83 a billable code?
No — R83 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 R83.0 — Abnormal level of enzymes in cerebrospinal fluid). 18 of the 18 codes under R83 are billable.
What codes fall under R83?
R83 includes R83.0, R83.0, R83.1, R83.1, R83.2, plus 13 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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