M25.4Non-Billable (Header)Effusion of jointExcludes 1 — Do NOT code togetherhydrarthrosis in yaws (A66.6)intermittent hydrarthrosis (M12.4-)other infective (teno)synovitis (M65.1-)Child CodesM25.40Effusion, unspecified jointM25.41Effusion, shoulderM25.42Effusion, elbowM25.43Effusion, wristM25.44Effusion, handM25.45Effusion, hipM25.46Effusion, kneeM25.47Effusion, ankle and footM25.48Effusion, other siteCode Hierarchy└M25Other joint disorder, not elsewhere classified└M25.4Effusion of joint└M25.4Effusion of joint