ICD-10-CM 2027 diagnosis code
H80.2Cochlear otosclerosis
H80.2 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
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 H80.2
H80.2 is the ICD-10-CM diagnosis code for cochlear 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 (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.
Specific codes under H80.2
Coding notes
- Otosclerosis involving otic capsule
- Otosclerosis involving round window
Notes that apply from higher levels
Instructions written at a parent level also apply to H80.2.
› From H80 Otosclerosis
- Otospongiosis
Broader instructions also apply from Chapter 8: Diseases of the ear and mastoid process.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to H80.2.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about H80.2
Is H80.2 billable?
- No. H80.2 is a header code. Report one of its more specific subcodes instead.