M12.231 Villonodular synovitis (pigmented), right wrist

Billable ICD-10-CM code, FY2026.

Applies from M12 Other and unspecified arthropathy

Excludes1 (never code together)

• arthrosis (M15-M19)
• cricoarytenoid arthropathy (J38.7)

MS-DRG index

Defines the logic of DRG(s) 553-554 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 719.23 Villonodular synovitis, forearm (approximate)

Code annotations containing back-references to M12.231

Back-references to M12.2

• Type 1 Excludes: M67.2 Synovial hypertrophy, not elsewhere classified ("villonodular synovitis (pigmented) (M12.2-)")

Nearby codes

• M12.22 Villonodular synovitis (pigmented), elbow
• M12.221 Villonodular synovitis (pigmented), right elbow
• M12.222 Villonodular synovitis (pigmented), left elbow
• M12.229 Villonodular synovitis (pigmented), unspecified elbow
• M12.23 Villonodular synovitis (pigmented), wrist
• M12.231 Villonodular synovitis (pigmented), right wrist (this code)
• M12.232 Villonodular synovitis (pigmented), left wrist
• M12.239 Villonodular synovitis (pigmented), unspecified wrist
• M12.24 Villonodular synovitis (pigmented), hand
• M12.241 Villonodular synovitis (pigmented), right hand
• M12.242 Villonodular synovitis (pigmented), left hand