ICD-10-CM 2027 diagnosis code

Q40Other congenital malformations of upper alimentary tract

Not billable — use a more specific code

Q40 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q40

Q40 is the ICD-10-CM diagnosis code for other congenital malformations of upper alimentary tract. It belongs to block Q38-Q45 (other congenital malformations of the digestive system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Q40.0 (stenosis), Q40.1 (hernia), Q40.2 (stomach), Q40.3 (unspecified), Q40.8 (tract) and Q40.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Q40

Notes that apply from higher levels

Instructions written at a parent level also apply to Q40.

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Code history

2016
2017
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2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about Q40

Is Q40 billable?: No. Q40 is a header code. Report one of its more specific subcodes instead.