Billable / Specific Code
ICD-10-CM R94.121 is the diagnosis code for Abnormal vestibular function study. This code falls under the section "Abnormal findings on diagnostic imaging and in function studies, without diagnosis" within Chapter 18 — Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where R94.121 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, R94.121 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
R94.121 is the ICD-10-CM diagnosis code for "Abnormal vestibular function study". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of R94.121 is R94.12 ("Abnormal results of function studies of ear and other special senses"). R94.121 provides a more specific classification within this category.
R94.121 is located in Section R90-R94 — "Abnormal findings on diagnostic imaging and in function studies, without diagnosis" within Chapter 18 of the ICD-10-CM Tabular List.
Use R94.121 when the patients documented diagnosis matches "Abnormal vestibular function study" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Abnormal vestibular function study is R94.121.
Yes, R94.121 can be used as a primary diagnosis code since it is billable and specific.
R94.121 is in Chapter 18 of the ICD-10-CM Tabular List.
Yes, R94.121 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.