M12.28 Villonodular synovitis (pigmented), other specified site

Billable ICD-10-CM code, FY2026.

Applicable to

• Villonodular synovitis (pigmented), vertebrae

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)

• 719.28 Villonodular synovitis, other specified sites

Code annotations containing back-references to M12.28

Back-references to M12.2

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

Diagnosis Index entries for M12.28

• Synovitis › villonodular (pigmented) › specified joint NEC
• Synovitis › villonodular (pigmented) › vertebrae

Nearby codes

• M12.269 Villonodular synovitis (pigmented), unspecified knee
• M12.27 Villonodular synovitis (pigmented), ankle and foot
• M12.271 Villonodular synovitis (pigmented), right ankle and foot
• M12.272 Villonodular synovitis (pigmented), left ankle and foot
• M12.279 Villonodular synovitis (pigmented), unspecified ankle and foot
• M12.28 Villonodular synovitis (pigmented), other specified site (this code)
• M12.29 Villonodular synovitis (pigmented), multiple sites
• M12.3 Palindromic rheumatism
• M12.30 Palindromic rheumatism, unspecified site
• M12.31 Palindromic rheumatism, shoulder
• M12.311 Palindromic rheumatism, right shoulder