M12.20 Villonodular synovitis (pigmented), unspecified site

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)

• 719.20 Villonodular synovitis, site unspecified

Code annotations containing back-references to M12.20

Back-references to M12.2

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

Nearby codes

• M12.172 Kaschin-Beck disease, left ankle and foot
• M12.179 Kaschin-Beck disease, unspecified ankle and foot
• M12.18 Kaschin-Beck disease, vertebrae
• M12.19 Kaschin-Beck disease, multiple sites
• M12.2 Villonodular synovitis (pigmented)
• M12.20 Villonodular synovitis (pigmented), unspecified site (this code)
• M12.21 Villonodular synovitis (pigmented), shoulder
• M12.211 Villonodular synovitis (pigmented), right shoulder
• M12.212 Villonodular synovitis (pigmented), left shoulder
• M12.219 Villonodular synovitis (pigmented), unspecified shoulder
• M12.22 Villonodular synovitis (pigmented), elbow