ICD-10-CM 2027
ICD-10 code for otosclerosis
From the official ICD-10-CM alphabetic index entry “Otosclerosis (general)”. Page updated September 29, 2026.
About coding otosclerosis
The ICD-10-CM code for otosclerosis is H80.9 (Unspecified otosclerosis). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H80.9.
Within H80, choose H80.9 (Unspecified otosclerosis) only when documentation doesn't support a more specific option: involving oval window, nonobliterative (H80.0), involving oval window, obliterative (H80.1), cochlear otosclerosis (H80.2) and other otosclerosis (H80.8).
To report this condition, pick the subcode that matches the documentation: H80.90 (unspecified ear), H80.91 (right ear), H80.92 (left ear) and H80.93 (bilateral).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific otosclerosis codes (official index)
- cochlear (endosteal) H80.2 — Cochlear otosclerosis
- involving
- otic capsule
- oval window
- nonobliterative H80.0 — Otosclerosis involving oval window, nonobliterative
- obliterative H80.1 — Otosclerosis involving oval window, obliterative
- round window
- nonobliterative
- obliterative
- specified NEC H80.8 — Other otosclerosis
Common questions about otosclerosis ICD-10 codes
What is the ICD-10 code for otosclerosis?
- H80.9 — Unspecified otosclerosis (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H80.2, H80.0, H80.1, H80.8.
What is the ICD-10 code for cochlear otosclerosis?
- H80.2 — Cochlear otosclerosis (header code; choose a more specific subcode).
Is H80.9 billable?
- No. H80.9 is a header code. Report one of its more specific subcodes instead.