Q42.8

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

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

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 Q42.8

FY 2026 ›
I.C.17Chapter-specific guidanceChapter 17: Congenital malformations, deformations, and chromosomal abnormalities (Q00-QA1)

Sections that reference Q42.8

Sections whose FY 2026 text names Q42.8, its Q42 category, or a range containing it — the chapter guidance above is the authoritative source.

Find Q42.8 in the alphabetic index

18 index paths lead to this code