Q42
Congenital absence, atresia and stenosis of large intestine
Q42 is a non-billable ICD-10-CM code category for congenital absence, atresia and stenosis of large intestine. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Q42.0 Congenital absence, atresia and stenosis of rectum with fistula; Q42.1 Congenital absence, atresia and stenosis of rectum without fistula; Q42.2 Congenital absence, atresia and stenosis of anus with fistula; Q42.3 Congenital absence, atresia and stenosis of anus without fistula and 2 more. Its coding notes include 1 Excludes2 entry.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Includes
Further defines or gives examples of the content of the category.
- congenital obstruction, occlusion and stricture of large intestine
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records
More specific codes under Q42 6
- Q42.0Congenital absence, atresia and stenosis of rectum with fistulaBillable
- Q42.1Congenital absence, atresia and stenosis of rectum without fistulaBillable
- Q42.2Congenital absence, atresia and stenosis of anus with fistulaBillable
- Q42.3Congenital absence, atresia and stenosis of anus without fistulaBillable
- Q42.8Congenital absence, atresia and stenosis of other parts of large intestineBillable
- Q42.9Congenital absence, atresia and stenosis of large intestine, part unspecifiedBillable