Abnormal findings in cerebrospinal fluid (R83) ICD-10-CM
The R83 code range covers abnormal findings in cerebrospinal fluid with 10 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the R83 Range 10 codes · 9 billable
- R83 Abnormal findings in cerebrospinal fluidNon-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
About the R83 Code Range
An examination of cerebrospinal fluid can reveal unusual substance levels or findings involving immune responses, microorganisms, or cells without establishing a diagnosis.
The subdivisions separate abnormal levels of enzymes (R83.0), hormones (R83.1), drugs and other medicinal substances (R83.2), and chiefly nonmedicinal substances (R83.3).
Other subdivisions distinguish immunological findings (R83.4), microbiological findings (R83.5), and cytological findings involving cells (R83.6). The remaining subdivisions identify other abnormal findings (R83.8) or an unspecified abnormal finding (R83.9).
Questions About This Page
How many billable codes are in the R83 range?
Of the 10 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the R83 range classify?
The range classifies abnormal findings in cerebrospinal fluid. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
