H75.00 (Mastoiditis in infectious and parasitic diseases classified elsewhere, unspecified ear) compared with H75.02 (Mastoiditis in infectious and parasitic diseases classified elsewhere, left ear), from the official CMS tabular data. H75.00 and H75.02 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. H75.00 and H75.02 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.
| H75.00Mastoiditis in infectious and parasitic diseases classified elsewhere, unspecified ear | H75.02Mastoiditis in infectious and parasitic diseases classified elsewhere, left 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 | Mastoiditis in infectious and parasitic diseases classified elsewhere, unspecified ear is a billable ICD-10-CM diagnosis code (H75.00). | Mastoiditis in infectious and parasitic diseases classified elsewhere, left ear is a billable ICD-10-CM diagnosis code (H75.02). |
| Code first | underlying disease | underlying disease |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources