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Q42 ICD-10-CA category: Congenital absence, atresia and stenosis of large intestine

Q42 isn’t a code on its own. Choose one of the 6 codes beneath it, the one the documentation supports.

Official description

Q42

Congenital absence, atresia and stenosis of large intestine

ICD-10-CA · Canada

Codes in Q42

Q42 isn’t a code on its own. Open the code that matches what the note documents.

Q42.0Congenital absence, atresia and stenosis of rectum with fistulaQ42.1Congenital absence, atresia and stenosis of rectum without fistulaQ42.2Congenital absence, atresia and stenosis of anus with fistulaQ42.3Congenital absence, atresia and stenosis of anus without fistulaQ42.8Congenital absence, atresia and stenosis of other parts of large intestineQ42.9Congenital absence, atresia and stenosis of large intestine, part unspecified

Notes for Q42

As CIHI prints them, with any note Q42 takes from the headings above it.

Includes

  • Congenital obstruction, occlusion and stricture of large intestine

Excludes

Conditions classified elsewhere.

  • Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)

Where Q42 sits

  1. 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  2. 2Block Q38-Q45Other congenital malformations of the digestive system
  3. 3Category Q42Congenital absence, atresia and stenosis of large intestine

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See Q42 in the CIHI source

Frequently asked questions

Is Q42 a valid ICD-10-CA code?

No. Q42 (Congenital absence, atresia and stenosis of large intestine) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 6 codes; record the one the documentation supports.

Where is Q42 in ICD-10-CA?

Q42 sits under Q38-Q45 Other congenital malformations of the digestive system, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).

What coding notes apply to Q42?

ICD-10-CA lists Includes, Excludes notes for Q42, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside Q42

Q38Other congenital malformations of tongue, mouth and pharynxQ39Congenital malformations of oesophagusQ40Other congenital malformations of upper alimentary tractQ41Congenital absence, atresia and stenosis of small intestineQ43Other congenital malformations of intestineQ44Congenital malformations of gallbladder, bile ducts and liverQ45Other congenital malformations of digestive system