H61.811 (Exostosis of right external canal) compared with H61.812 (Exostosis of left external canal), from the official CMS tabular data. H61.811 and H61.812 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. H61.811 and H61.812 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.
| H61.811Exostosis of right external canal | H61.812Exostosis of left external canal | |
|---|---|---|
| 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 | Exostosis of right external canal is a billable ICD-10-CM diagnosis code (H61.811). | Exostosis of left external canal is a billable ICD-10-CM diagnosis code (H61.812). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources