ICD-10-CM 2027
ICD-10 code for brain scan abnormal
From the official ICD-10-CM alphabetic index entry “Abnormal, abnormality, abnormalities › brain scan”. Page updated September 29, 2026.
About coding brain scan abnormal
The ICD-10-CM code for brain scan abnormal is R94.02 (Abnormal brain scan).
Within R94.0 (abnormal results of function studies of central nervous system), R94.02 is specifically for abnormal brain scan. Related codes cover electroencephalogram [EEG] (R94.01) and results of other function studies of central nervous system (R94.09).
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.
Common questions about brain scan abnormal ICD-10 codes
What is the ICD-10 code for brain scan abnormal?
- R94.02 — Abnormal brain scan.
Is R94.02 billable?
- Yes. R94.02 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R94.02 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R94.02 as a principal diagnosis.
Is R94.02 a CC or MCC?
- No. R94.02 is neither a CC nor an MCC under MS-DRG v44.0.