H74.312 (Ankylosis of ear ossicles, left ear) compared with H74.319 (Ankylosis of ear ossicles, unspecified ear), from the official CMS tabular data. H74.312 and H74.319 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. H74.312 and H74.319 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.
| H74.312Ankylosis of ear ossicles, left ear | H74.319Ankylosis of ear ossicles, unspecified 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 | Ankylosis of ear ossicles, left ear is a billable ICD-10-CM diagnosis code (H74.312). | Ankylosis of ear ossicles, unspecified ear is a billable ICD-10-CM diagnosis code (H74.319). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources