M12.261 (Villonodular synovitis (pigmented), right knee) compared with M12.262 (Villonodular synovitis (pigmented), left knee), from the official CMS tabular data. M12.261 and M12.262 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. M12.261 and M12.262 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.
| M12.261Villonodular synovitis (pigmented), right knee | M12.262Villonodular synovitis (pigmented), left knee | |
|---|---|---|
| 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 | Villonodular synovitis (pigmented), right knee is a billable ICD-10-CM diagnosis code (M12.261). | Villonodular synovitis (pigmented), left knee is a billable ICD-10-CM diagnosis code (M12.262). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources