ICD-10-CM 2027
ICD-10 code for caloric test abnormal
From the official ICD-10-CM alphabetic index entry “Abnormal, abnormality, abnormalities › caloric test”. Page updated September 29, 2026.
About coding caloric test abnormal
The ICD-10-CM code for caloric test abnormal is R94.138 (Abnormal results of other function studies of peripheral nervous system).
Within R94.13, choose R94.138 (results of other function studies of peripheral nervous system) only when documentation doesn't support a more specific option: response to nerve stimulation, unspecified (R94.130) and electromyogram [EMG] (R94.131).
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 caloric test abnormal ICD-10 codes
What is the ICD-10 code for caloric test abnormal?
- R94.138 — Abnormal results of other function studies of peripheral nervous system.
Is R94.138 billable?
- Yes. R94.138 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R94.138 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R94.138 as a principal diagnosis.
Is R94.138 a CC or MCC?
- No. R94.138 is neither a CC nor an MCC under MS-DRG v44.0.