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Q43.6 ICD-10-CA code: Congenital fistula of rectum and anus

Q43.6 is the ICD-10-CA code for “Congenital fistula of rectum and anus” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

Q43.6

Congenital fistula of rectum and anus

ICD-10-CA · Canada · Also written Q436

Index terms

Entries in CIHI’s alphabetical index that lead to Q43.6. Searching the index by the condition the note names is how coders reach this code.

  • Fistula, fecal, congenital
  • Fistula, rectum (to skin), congenital
  • Fistula, anus, anal (infectional) (recurrent), congenital

Notes for Q43.6

As CIHI prints them, with any note Q43.6 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • Congenital fistula:• rectovaginal (Q52.2)• urethrorectal (Q64.70)pilonidal fistula or sinus (L05.-)with absence, atresia and stenosis (Q42.0, Q42.2)
  • Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)

Where Q43.6 sits

  1. 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  2. 2Block Q38-Q45Other congenital malformations of the digestive system
  3. 3Category Q43Other congenital malformations of intestine
  4. 4Valid code Q43.6Congenital fistula of rectum and anus

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 Q43.6 in the CIHI source

Frequently asked questions

What does ICD-10-CA code Q43.6 mean?

Q43.6 is the ICD-10-CA code for “Congenital fistula of rectum and anus” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is Q43.6 in ICD-10-CA?

Q43.6 sits under Q43 Other congenital malformations of intestine, within 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 Q43.6?

ICD-10-CA lists Excludes notes for Q43.6, 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 Q43.6

Q43.0Meckel diverticulumQ43.1Hirschsprung's diseaseQ43.2Other congenital functional disorders of colonQ43.3Congenital malformations of intestinal fixationQ43.4Duplication of intestineQ43.5Ectopic anusQ43.7Persistent cloacaQ43.8Other specified congenital malformations of intestineQ43.9Congenital malformation of intestine, unspecified