R94.121 Abnormal vestibular function study

Billable ICD-10-CM code, FY2026.

Applies from R94 Abnormal results of function studies

Includes

• abnormal results of radionuclide [radioisotope] uptake studies
• abnormal results of scintigraphy

MS-DRG index

Defines the logic of DRG(s) 154-156 in MDC 03.

Approximate ICD-9-CM (GEMs)

• 794.16 Nonspecific abnormal vestibular function studies

Code annotations containing back-references to R94.121

Back-references to R94

• Type 1 Excludes: T88.7 Unspecified adverse effect of drug or medicament ("specified adverse effects of drugs and medicaments (A00-R94 and T80-T88.6, T88.8)")

Diagnosis Index entries for R94.121

• Abnormal, abnormality, abnormalities › function studies › vestibular

Nearby codes

• R94.112 Abnormal visually evoked potential [VEP]
• R94.113 Abnormal oculomotor study
• R94.118 Abnormal results of other function studies of eye
• R94.12 Abnormal results of function studies of ear and other special senses
• R94.120 Abnormal auditory function study
• R94.121 Abnormal vestibular function study (this code)
• R94.128 Abnormal results of other function studies of ear and other special senses
• R94.13 Abnormal results of function studies of peripheral nervous system
• R94.130 Abnormal response to nerve stimulation, unspecified
• R94.131 Abnormal electromyogram [EMG]
• R94.138 Abnormal results of other function studies of peripheral nervous system