ICD-10-CM 2027 diagnosis code

Q45Other congenital malformations of digestive system

Not billable — use a more specific code

Q45 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 Q45

Q45 is the ICD-10-CM diagnosis code for other congenital malformations of digestive system. 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: Q45.0 (pancreas), Q45.1 (pancreas), Q45.2 (cyst), Q45.3 (duct), Q45.8 (system) and Q45.9 (unspecified).

The conditions in its Excludes2 note aren't part of Q45, but may be coded alongside it if the patient has both: congenital diaphragmatic hernia (Q79.0) and congenital hiatus hernia (Q40.1).

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 Q45

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

congenital diaphragmatic hernia (Q79.0)
congenital hiatus hernia (Q40.1)

Notes that apply from higher levels

Instructions written at a parent level also apply to Q45.

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

Code history

2016
2017
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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 Q45

Is Q45 billable?: No. Q45 is a header code. Report one of its more specific subcodes instead.