Q42 – Congenital absence, atresia and stenosis of large intestine
ICD-10-CM 2027 diagnosis code · Other congenital malformations of the digestive system
ICD-10-CM code
Q42
- Code
Q42(claims format:Q42)- Description
- Congenital absence, atresia and stenosis of large intestine
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q38-Q45 Other congenital malformations of the digestive system
Billable codes under Q42
Q42 is a header code and cannot be used on claims. Choose the most specific code:
- Q42.0 – Congenital absence, atresia and stenosis of rectum with fistulaBillable
- Q42.1 – Congenital absence, atresia and stenosis of rectum without fistulaBillable
- Q42.2 – Congenital absence, atresia and stenosis of anus with fistulaBillable
- Q42.3 – Congenital absence, atresia and stenosis of anus without fistulaBillable
- Q42.8 – Congenital absence, atresia and stenosis of other parts of large intestineBillable
- Q42.9 – Congenital absence, atresia and stenosis of large intestine, part unspecifiedBillable
Notes for Q42
Includes:
- congenital obstruction, occlusion and stricture of large intestine
Frequently asked questions
What is ICD-10 code Q42?
Q42 is the ICD-10-CM code for congenital absence, atresia and stenosis of large intestine, in the block Q38-Q45 (Other congenital malformations of the digestive system).
Is Q42 a billable code?
No. Q42 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.