M61.178 (Myositis ossificans progressiva, left toe(s)) compared with M61.179 (Myositis ossificans progressiva, unspecified toe(s)), from the official CMS tabular data. M61.178 and M61.179 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. M61.178 and M61.179 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.
| M61.178Myositis ossificans progressiva, left toe(s) | M61.179Myositis ossificans progressiva, unspecified toe(s) | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the musculoskeletal system and connective tissue | M00-M99 — Diseases of the musculoskeletal system and connective tissue |
| Definition | Myositis ossificans progressiva, left toe(s) is a billable ICD-10-CM diagnosis code (M61.178). | Myositis ossificans progressiva, unspecified toe(s) is a billable ICD-10-CM diagnosis code (M61.179). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources