M25.1Non-Billable (Header)Fistula of jointChild CodesM25.10Fistula, unspecified jointM25.11Fistula, shoulderM25.12Fistula, elbowM25.13Fistula, wristM25.14Fistula, handM25.15Fistula, hipM25.16Fistula, kneeM25.17Fistula, ankle and footM25.18Fistula, other specified siteCode Hierarchy└M25Other joint disorder, not elsewhere classified└M25.1Fistula of joint└M25.1Fistula of joint