Q42.3
Congenital absence, atresia and stenosis of anus without fistula
Risk-adjusting (HCC)Billable code
HCC risk adjustment mapping
CMS-HCC V28
HCC78
Intestinal Obstruction/Perforation
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
This code · Q42.3
Synonyms
Imperforate anus
Inherited from Q42Congenital absence, atresia and stenosis of large intestine
Includes
congenital obstruction, occlusion and stricture of large intestine
Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities
Excludes 2
inborn errors of metabolism (E70-E88)
Note
Codes from this chapter are not for use on maternal records
Official Guidelines for Q42.3
FY 2026 ›Sections that reference Q42.3
Sections whose FY 2026 text names Q42.3, its Q42 category, or a range containing it — the chapter guidance above is the authoritative source.
Find Q42.3 in the alphabetic index
12 index paths lead to this code
- Absence › anus
- Agenesis › anus, anal
- Atresia, atretic › ani, anus, anal
- Hypoplasia, hypoplastic › anus, anal
- Imperforate › anus
- Impervious › anus
- Persistence, persistent › anal membrane
- Septum, septate › anal
- Occlusion, occluded › anus › congenital
- Stenosis, stenotic › anus, anal › congenital
- Stricture › anus › congenital
- Stricture › anus › infantile