H80.20 (Cochlear otosclerosis, unspecified ear) compared with H80.21 (Cochlear otosclerosis, right ear), from the official CMS tabular data. H80.20 and H80.21 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. H80.20 and H80.21 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| H80.20Cochlear otosclerosis, unspecified ear | H80.21Cochlear otosclerosis, right ear | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95) | H60-H95 — Diseases of the Ear and Mastoid Process (H60-H95) |
| Definition | Cochlear otosclerosis, unspecified ear is a billable ICD-10-CM diagnosis code (H80.20). | Cochlear otosclerosis, right ear is a billable ICD-10-CM diagnosis code (H80.21). |
| Includes | Otospongiosis | Otospongiosis |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources