M12.21 Villonodular synovitis (pigmented), shoulder

Non-billable header with 3 child codes.

Applies from M12 Other and unspecified arthropathy

Excludes1 (never code together)

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

Codes under M12.21

• M12.211 Villonodular synovitis (pigmented), right shoulder
• M12.212 Villonodular synovitis (pigmented), left shoulder
• M12.219 Villonodular synovitis (pigmented), unspecified shoulder

Code annotations containing back-references to M12.21

Back-references to M12.2

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

Diagnosis Index entries for M12.21

• Synovitis › villonodular (pigmented) › shoulder

Nearby codes

• 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
• M12.21 Villonodular synovitis (pigmented), shoulder (this code)
• 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
• M12.221 Villonodular synovitis (pigmented), right elbow