Congenital absence, atresia and stenosis of large intestine (Q42)

The ICD-10 code Q42 covers congenital conditions involving the absence, atresia (closure), or narrowing (stenosis) of the large intestine. These codes are specifically used to document birth defects affecting various parts of the large bowel, including the rectum and anus, with or without associated fistulas.

This group includes detailed subcodes such as Q42.0 for congenital absence or narrowing of the rectum with fistula, and Q42.1 for similar conditions without fistula. Codes Q42.2 and Q42.3 describe congenital anomalies of the anus, either with or without fistula. Other parts of the large intestine, including the appendix, are categorized under Q42.8. When the specific part is not specified, Q42.9 applies. These codes help medical coders accurately capture diagnoses such as congenital rectal or anal stenosis, anorectal stricture, anal atresia, and other large intestine malformations, assisting in clear clinical communication and appropriate treatment planning. Searches for the ICD-10 code for congenital absence or atresia of the large intestine will reference these exact codes to identify precise defects present at birth.