ICD-10 code for cerebrospinal fluid abnormal

The ICD-10-CM code for cerebrospinal fluid abnormal is R83.9 (Unspecified abnormal finding in cerebrospinal fluid). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R83.9.

Within R83, choose R83.9 (Unspecified abnormal finding in cerebrospinal fluid) only when documentation doesn't support a more specific option: abnormal level of enzymes in cerebrospinal fluid (R83.0), abnormal level of hormones in cerebrospinal fluid (R83.1), abnormal level of other drugs, medicaments and biological substances in cerebrospinal fluid (R83.2), abnormal level of substances chiefly nonmedicinal as to source in cerebrospinal fluid (R83.3), abnormal immunological findings in cerebrospinal fluid (R83.4), abnormal microbiological findings in cerebrospinal fluid (R83.5), abnormal cytological findings in cerebrospinal fluid (R83.6) and other abnormal findings in cerebrospinal fluid (R83.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.