H74.321 (Partial loss of ear ossicles, right ear) compared with H74.329 (Partial loss of ear ossicles, unspecified ear), from the official CMS tabular data. H74.321 and H74.329 code the same condition on opposite sides. MedCoder-derived
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. H74.321 and H74.329 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.
| H74.321Partial loss of ear ossicles, right ear | H74.329Partial loss of ear ossicles, unspecified ear | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | H60-H95 — Diseases of the ear and mastoid process | H60-H95 — Diseases of the ear and mastoid process |
| Definition | Partial loss of ear ossicles, right ear is a billable ICD-10-CM diagnosis code (H74.321). | Partial loss of ear ossicles, unspecified ear is a billable ICD-10-CM diagnosis code (H74.329). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources