M65.261 Calcific tendinitis, 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.-)

Applies from M65.2 Calcific tendinitis

Excludes1 (never code together)

• tendinitis as classified in M75-M77
• calcified tendinitis of shoulder (M75.3)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 727.82 Calcium deposits in tendon and bursa (approximate)

Code annotations containing back-references to M65.261

Back-references to M65.2

• Type 2 Excludes: M25 Other joint disorder, not elsewhere classified ("calcification of tendon (M65.2-)")
• Type 1 Excludes: M61.4 Other calcification of muscle ("calcific tendinitis NOS (M65.2-)")

Nearby codes

• M65.25 Calcific tendinitis, thigh
• M65.251 Calcific tendinitis, right thigh
• M65.252 Calcific tendinitis, left thigh
• M65.259 Calcific tendinitis, unspecified thigh
• M65.26 Calcific tendinitis, lower leg
• M65.261 Calcific tendinitis, right lower leg (this code)
• M65.262 Calcific tendinitis, left lower leg
• M65.269 Calcific tendinitis, unspecified lower leg
• M65.27 Calcific tendinitis, ankle and foot
• M65.271 Calcific tendinitis, right ankle and foot
• M65.272 Calcific tendinitis, left ankle and foot