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ICD-10-CM 2027

ICD-10 code for cochlear endosteal otosclerosis

H80.2

Cochlear otosclerosis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Otosclerosis (general) › cochlear (endosteal)”. Page updated September 29, 2026.

About coding cochlear endosteal otosclerosis

The ICD-10-CM code for cochlear endosteal otosclerosis is H80.2 (Cochlear otosclerosis).

Within H80 (otosclerosis), H80.2 is specifically for cochlear otosclerosis. Related codes cover involving oval window, nonobliterative (H80.0), involving oval window, obliterative (H80.1), other otosclerosis (H80.8) and unspecified otosclerosis (H80.9).

To report this condition, pick the subcode that matches the documentation: H80.20 (unspecified ear), H80.21 (right ear), H80.22 (left ear) and H80.23 (bilateral).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about cochlear endosteal otosclerosis ICD-10 codes

What is the ICD-10 code for cochlear endosteal otosclerosis?

H80.2 — Cochlear otosclerosis (a header code; report a more specific subcode).

Is H80.2 billable?

No. H80.2 is a header code. Report one of its more specific subcodes instead.