U.S. ICD-10-CM · FY 2027

Q42 ICD-10-CM Code: Congenital absence, atresia and stenosis of large intestine

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

Q42

Congenital absence, atresia and stenosis of large intestine

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where Q42 sits

  1. 1

    Chapter 17

    Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)

  2. 2

    Section

    Other congenital malformations of the digestive system (Q38-Q45)

  3. 3

    Category Q42

    Congenital absence, atresia and stenosis of large intestine

  4. 4

    Code Q42

    Congenital absence, atresia and stenosis of large intestine

More specific choices

Codes under Q42

Q42 is a non-billable category. Choose the child code that best matches the documented diagnosis.

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

Q42.8

Congenital absence, atresia and stenosis of other parts of large intestine

Q42.9

Congenital absence, atresia and stenosis of large intestine, part unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for Q42.

Code first

No “code first” instruction is listed for Q42.

Use additional code

No “use additional code” instruction is listed for Q42.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for Q42.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for Q42.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code Q42 mean?

Q42 is the FY 2027 U.S. ICD-10-CM code for “Congenital absence, atresia and stenosis of large intestine.”

Is Q42 a billable or specific ICD-10-CM code?

No. Q42 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is Q42 located in ICD-10-CM?

Q42 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Other congenital malformations of the digestive system (Q38-Q45) (Q38–Q45), under category Q42, Congenital absence, atresia and stenosis of large intestine.

What coding notes are listed for Q42?

No inclusion terms are listed for Q42 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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