M65.039 Abscess of tendon sheath, 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.-)

Applies from M65.0 Abscess of tendon sheath

Use additional code

• code (B95-B96) to identify bacterial agent.

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

• M65.022 Abscess of tendon sheath, left upper arm
• M65.029 Abscess of tendon sheath, unspecified upper arm
• M65.03 Abscess of tendon sheath, forearm
• M65.031 Abscess of tendon sheath, right forearm
• M65.032 Abscess of tendon sheath, left forearm
• M65.039 Abscess of tendon sheath, unspecified forearm (this code)
• M65.04 Abscess of tendon sheath, hand
• M65.041 Abscess of tendon sheath, right hand
• M65.042 Abscess of tendon sheath, left hand
• M65.049 Abscess of tendon sheath, unspecified hand
• M65.05 Abscess of tendon sheath, thigh