H81.9 Unspecified disorder of vestibular function

ICD-10-CM Code H81.9: Unspecified Disorder of Vestibular Function

ICD-10-CM code H81.9 represents an unspecified disorder of vestibular function, classified under the parent category H81. The code is located in Chapter 8 for diseases of the ear and mastoid process. While one official terminology record lists no narrower concepts for this code, another coding reference notes the existence of more specific child codes in April 2026 data. 1 5

Plain-language overview

Code H81.9 is an active terminology concept representing an unspecified disorder of vestibular function, classified with the semantic type of disease or syndrome. 1

What this code represents

Code H81.9 belongs to parent concept H81 for disorders of vestibular function, and one reference notes it has more specific child codes in April 2026 data. 1 5

Code H81.9 is located in Chapter 8 for diseases of the ear and mastoid process, specifically within the block covering diseases of the inner ear under category H81. 5

Clinical context

Vestibular dysfunction can present with dizziness, imbalance, gait instability, and increased fall risk, with origins that may be peripheral, central, or mixed. 2

Documentation considerations

One coding reference lists laterality variations for H81.9, including unspecified ear, right ear, left ear, and bilateral, while another official record lists no narrower concepts. 1 5

Code H81.9 has no listed instruction to code another condition first and no listed instruction to use an additional code in the reviewed reference data. 5

Coverage and utilization context

A Medicare article contains billing and coding guidelines that complement a local coverage determination for vestibular function testing, without establishing any coverage guarantees. 3

What the sources add

While the official terminology record establishes the active status and preferred name for H81.9, a separate coding reference adds structural hierarchy and laterality details. 1 5

A clinical reference describes vestibular hypofunction epidemiology and diagnostic evaluation, whereas the official code record provides only the diagnostic label without clinical management details. 1 2

Sources

1. ICD-10-CM H81.9 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. MCD Search — cms.gov; accessed 2026-07-27.
4. 2026 ICD-10-CM Diagnosis Codes Related to Hearing and ... — asha.org; accessed 2026-07-27.
5. ICD-10-CM Code H81.9 | Vero — veroscribe.com; accessed 2026-07-27.