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	✓
R83.1	Abnormal level of hormones 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	✓
R83.4	Abnormal immunological findings in cerebrospinal fluid	✓
R83.5	Abnormal microbiological findings in cerebrospinal fluid	✓
R83.6	Abnormal cytological findings in cerebrospinal fluid	✓
R83.8	Other abnormal findings in cerebrospinal fluid	✓
R83.9	Unspecified abnormal finding in cerebrospinal fluid	✓

More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees

Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

Code the diagnosis right