M25.46 Effusion, knee

Non-billable header with 3 child codes.

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-)

Applies from M25.4 Effusion of joint

Excludes1 (never code together)

• hydrarthrosis in yaws (A66.6)
• intermittent hydrarthrosis (M12.4-)
• other infective (teno)synovitis (M65.1-)

Codes under M25.46

• M25.461 Effusion, right knee
• M25.462 Effusion, left knee
• M25.469 Effusion, unspecified knee

Code annotations containing back-references to M25.46

Back-references to M25.4

• Type 1 Excludes: R22 Localized swelling, mass and lump of skin and subcutaneous tissue ("swelling of joint (M25.4-)")

Diagnosis Index entries for M25.46

• Effusion › joint › knee

Nearby codes

• M25.449 Effusion, unspecified hand
• M25.45 Effusion, hip
• M25.451 Effusion, right hip
• M25.452 Effusion, left hip
• M25.459 Effusion, unspecified hip
• M25.46 Effusion, knee (this code)
• M25.461 Effusion, right knee
• M25.462 Effusion, left knee
• M25.469 Effusion, unspecified knee
• M25.47 Effusion, ankle and foot
• M25.471 Effusion, right ankle