M65.879 Other synovitis and tenosynovitis, 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.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 727.06 Tenosynovitis of foot and ankle (approximate)

Nearby codes

• M65.862 Other synovitis and tenosynovitis, left lower leg
• M65.869 Other synovitis and tenosynovitis, unspecified lower leg
• M65.87 Other synovitis and tenosynovitis, ankle and foot
• M65.871 Other synovitis and tenosynovitis, right ankle and foot
• M65.872 Other synovitis and tenosynovitis, left ankle and foot
• M65.879 Other synovitis and tenosynovitis, unspecified ankle and foot (this code)
• M65.88 Other synovitis and tenosynovitis, other site
• M65.89 Other synovitis and tenosynovitis, multiple sites
• M65.9 Synovitis and tenosynovitis, unspecified
• M65.90 Unspecified synovitis and tenosynovitis, unspecified site
• M65.91 Unspecified synovitis and tenosynovitis, shoulder