M21.951 (Unspecified acquired deformity of right thigh) compared with M21.952 (Unspecified acquired deformity of left thigh), from the official CMS tabular data. M21.951 and M21.952 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. M21.951 and M21.952 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.
| M21.951Unspecified acquired deformity of right thigh | M21.952Unspecified acquired deformity of left thigh | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Unspecified acquired deformity of right thigh is a billable ICD-10-CM diagnosis code (M21.951). | Unspecified acquired deformity of left thigh is a billable ICD-10-CM diagnosis code (M21.952). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources