M65.961 Unspecified synovitis and tenosynovitis, right lower leg

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

• M65.95 Unspecified synovitis and tenosynovitis, thigh
• M65.951 Unspecified synovitis and tenosynovitis, right thigh
• M65.952 Unspecified synovitis and tenosynovitis, left thigh
• M65.959 Unspecified synovitis and tenosynovitis, unspecified thigh
• M65.96 Unspecified synovitis and tenosynovitis, lower leg
• M65.961 Unspecified synovitis and tenosynovitis, right lower leg (this code)
• M65.962 Unspecified synovitis and tenosynovitis, left lower leg
• M65.969 Unspecified synovitis and tenosynovitis, unspecified lower leg
• M65.97 Unspecified synovitis and tenosynovitis, ankle and foot
• M65.971 Unspecified synovitis and tenosynovitis, right ankle and foot
• M65.972 Unspecified synovitis and tenosynovitis, left ankle and foot