M25.261 Flail joint, right knee

Billable ICD-10-CM code, FY2026.

Applies from M25 Other joint disorder, not elsewhere classified

Excludes2 (not included here)

• abnormality of gait and mobility (R26.-)
• acquired deformities of limb (M20-M21)
• calcification of bursa (M71.4-)
• calcification of shoulder (joint) (M75.3)
• calcification of tendon (M65.2-)
• difficulty in walking (R26.2)
• temporomandibular joint disorder (M26.6-)

MS-DRG index

Defines the logic of DRG(s) 564-566 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 718.86 Other joint derangement, not elsewhere classified, lower leg (approximate)

Nearby codes

• M25.25 Flail joint, hip
• M25.251 Flail joint, right hip
• M25.252 Flail joint, left hip
• M25.259 Flail joint, unspecified hip
• M25.26 Flail joint, knee
• M25.261 Flail joint, right knee (this code)
• M25.262 Flail joint, left knee
• M25.269 Flail joint, unspecified knee
• M25.27 Flail joint, ankle and foot
• M25.271 Flail joint, right ankle and foot
• M25.272 Flail joint, left ankle and foot