ICD-10-CM 2027 diagnosis code

H80.9Unspecified otosclerosis

Not billable — use a more specific code

H80.9 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Looking up by condition? See ICD-10 code for Otosclerosis.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H80.9

H80.9 is the ICD-10-CM diagnosis code for unspecified otosclerosis. It belongs to category H80 (otosclerosis), block H80-H83 (diseases of inner ear) and chapter 8 (diseases of the ear and mastoid process). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

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.

Specific codes under H80.9

Notes that apply from higher levels

Instructions written at a parent level also apply to H80.9.

› From H80 Otosclerosis

Includes

Otospongiosis

Broader instructions also apply from Chapter 8: Diseases of the ear and mastoid process.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to H80.9.

Otosclerosis (general)

Code history

2016
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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about H80.9

Is H80.9 billable?: No. H80.9 is a header code. Report one of its more specific subcodes instead.