ICD-10-CM
ICD-10 code for Agenesis anus, anal (canal): Q42.3
The ICD-10-CM index points "Agenesis anus, anal (canal)" to Q42.3, Congenital absence, atresia and stenosis of anus without fistula. Q42.3 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in Q42
A header groups codes and is not billed. A billable code is one you can report.
- Q42Congenital absence, atresia and stenosis of large intestineHeader
- Q42.0Congenital absence, atresia and stenosis of rectum with fistulaBillable
- Q42.1Congenital absence, atresia and stenosis of rectum without fistulaBillable
- Q42.2Congenital absence, atresia and stenosis of anus with fistulaBillable
- Q42.3Congenital absence, atresia and stenosis of anus without fistulaBillable
- Q42.8Congenital absence, atresia and stenosis of other parts of large intestineBillable
- Q42.9Congenital absence, atresia and stenosis of large intestine, part unspecifiedBillable
Related conditions
Related pages
- Q42.3 code detailsNotes, nearby codes, CMS-HCC group
- Category Q42Every code under it
- Chapter 17Congenital malformations and chromosomal abnormalities
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Agenesis anus, anal (canal)?
The ICD-10-CM index points "Agenesis anus, anal (canal)" to Q42.3, Congenital absence, atresia and stenosis of anus without fistula. Q42.3 is a billable code.
Is Q42.3 billable?
Yes. Q42.3 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What chapter is Q42.3 in?
Chapter 17. Congenital malformations and chromosomal abnormalities.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.