M67.231 Synovial hypertrophy, not elsewhere classified, right forearm

Billable ICD-10-CM code, FY2026.

Applies from M67 Other disorders of synovium and tendon

Excludes1 (never code together)

• palmar fascial fibromatosis [Dupuytren] (M72.0)
• tendinitis NOS (M77.9-)
• xanthomatosis localized to tendons (E78.2)

Applies from M67.2 Synovial hypertrophy, not elsewhere classified

Excludes1 (never code together)

• villonodular synovitis (pigmented) (M12.2-)

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 727.89 Other disorders of synovium, tendon, and bursa (approximate)

Nearby codes

• M67.22 Synovial hypertrophy, not elsewhere classified, upper arm
• M67.221 Synovial hypertrophy, not elsewhere classified, right upper arm
• M67.222 Synovial hypertrophy, not elsewhere classified, left upper arm
• M67.229 Synovial hypertrophy, not elsewhere classified, unspecified upper arm
• M67.23 Synovial hypertrophy, not elsewhere classified, forearm
• M67.231 Synovial hypertrophy, not elsewhere classified, right forearm (this code)
• M67.232 Synovial hypertrophy, not elsewhere classified, left forearm
• M67.239 Synovial hypertrophy, not elsewhere classified, unspecified forearm
• M67.24 Synovial hypertrophy, not elsewhere classified, hand
• M67.241 Synovial hypertrophy, not elsewhere classified, right hand
• M67.242 Synovial hypertrophy, not elsewhere classified, left hand