M65.079 Abscess of tendon sheath, unspecified ankle and foot

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

• M65.062 Abscess of tendon sheath, left lower leg
• M65.069 Abscess of tendon sheath, unspecified lower leg
• M65.07 Abscess of tendon sheath, ankle and foot
• M65.071 Abscess of tendon sheath, right ankle and foot
• M65.072 Abscess of tendon sheath, left ankle and foot
• M65.079 Abscess of tendon sheath, unspecified ankle and foot (this code)
• M65.08 Abscess of tendon sheath, other site
• M65.1 Other infective (teno)synovitis
• M65.10 Other infective (teno)synovitis, unspecified site
• M65.11 Other infective (teno)synovitis, shoulder
• M65.111 Other infective (teno)synovitis, right shoulder