M65.939 Unspecified synovitis and tenosynovitis, unspecified forearm

Billable ICD-10-CM code, FY2026.

Applies from M65 Synovitis and tenosynovitis

Excludes1 (never code together)

• chronic crepitant synovitis of hand and wrist (M70.0-)
• current injury - see injury of ligament or tendon by body region
• soft tissue disorders related to use, overuse and pressure (M70.-)

MS-DRG index

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

Nearby codes

• M65.922 Unspecified synovitis and tenosynovitis, left upper arm
• M65.929 Unspecified synovitis and tenosynovitis, unspecified upper arm
• M65.93 Unspecified synovitis and tenosynovitis, forearm
• M65.931 Unspecified synovitis and tenosynovitis, right forearm
• M65.932 Unspecified synovitis and tenosynovitis, left forearm
• M65.939 Unspecified synovitis and tenosynovitis, unspecified forearm (this code)
• M65.94 Unspecified synovitis and tenosynovitis, hand
• M65.941 Unspecified synovitis and tenosynovitis, right hand
• M65.942 Unspecified synovitis and tenosynovitis, left hand
• M65.949 Unspecified synovitis and tenosynovitis, unspecified hand
• M65.95 Unspecified synovitis and tenosynovitis, thigh