Q43.6 – Congenital fistula of rectum and anus

ICD-10-CM 2027 diagnosis code · Other congenital malformations of the digestive system

Billable code

ICD-10-CM code Q43.6

Code: Q43.6 (claims format: Q436)
Description: Congenital fistula of rectum and anus
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: Q43

Notes for Q43.6

Excludes1 (not coded here):

congenital fistula of anus with absence, atresia and stenosis (Q42.2)
congenital fistula of rectum with absence, atresia and stenosis (Q42.0)
congenital rectovaginal fistula (Q52.2)
congenital urethrorectal fistula (Q64.73)
pilonidal fistula or sinus (L05.-)

Index terms for Q43.6

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Q43

Q43.0 – Meckel's diverticulum (displaced) (hypertrophic)Billable
Q43.1 – Hirschsprung's diseaseBillable
Q43.2 – Other congenital functional disorders of colonBillable
Q43.3 – Congenital malformations of intestinal fixationBillable
Q43.4 – Duplication of intestineBillable
Q43.5 – Ectopic anusBillable
Q43.7 – Persistent cloacaBillable
Q43.8 – Other specified congenital malformations of intestineBillable
Q43.9 – Congenital malformation of intestine, unspecifiedBillable

Frequently asked questions

What is ICD-10 code Q43.6?

Q43.6 is the ICD-10-CM code for congenital fistula of rectum and anus, in the block Q38-Q45 (Other congenital malformations of the digestive system).

Is Q43.6 a billable code?

Yes. Q43.6 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Q43.6 belong to?

It belongs to category Q43 – Other congenital malformations of intestine.

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.