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Q42 Congenital absence, atresia and stenosis of large intestine

ICD-10-CM category Q42 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 6 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in Q42

CodeDescription
Q42.0Congenital absence, atresia and stenosis of rectum with fistula
Q42.1Congenital absence, atresia and stenosis of rectum without fistula
Q42.2Congenital absence, atresia and stenosis of anus with fistula
Q42.3Congenital absence, atresia and stenosis of anus without fistula
Q42.8Congenital absence, atresia and stenosis of other parts of large intestine
Q42.9Congenital absence, atresia and stenosis of large intestine, part unspecified

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