2026 ICD-10-CM Diagnosis Code Q40Other congenital malformations of upper alimentary tract

ICD-10-CM Codes›Q00-Q99›Q38-Q45›Q40

ICD-10-CM Q40
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q40 is a non-billable ICD-10-CM category code for other congenital malformations of upper alimentary tract, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q40.0, Q40.1, Q40.2, and Q40.3.

Code Identity

ICD-10-CM Code
Q40
Billable Status
No — Non-Billable Category
Code Describes
Other congenital malformations of upper alimentary tract
Chapter
Q38-Q45
Other congenital malformations of the digestive system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ38-Q45Other congenital malformations of the digestive system
CategoryQ40Other congenital malformations of upper alimentary tract
This CodeQ40Other congenital malformations of upper alimentary tract

Specific Coding for Other congenital malformations of upper alimentary tractOverview

Non-specific codes like Q40 require more characters. Use one of these billable codes instead:

  • Use Q40.0 for Congenital hypertrophic pyloric stenosis

  • Use Q40.1 for Congenital hiatus hernia

  • Use Q40.2 for Other specified congenital malformations of stomach

  • Use Q40.3 for Congenital malformation of stomach, unspecified

  • Use Q40.8 for Other specified congenital malformations of upper alimentary tract

  • Use Q40.9 for Congenital malformation of upper alimentary tract, unspecified

Patient EducationClinical

Birth Defects

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Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q40Overview

Is Q40 (Other congenital malformations of upper alimentary tract) a billable code?

No. This is a category header that groups the codes for other congenital malformations of upper alimentary tract, and headers cannot be submitted on claims. Claims for other congenital malformations of upper alimentary tract need a more specific code from this category, such as Q40.0, Q40.1, and Q40.2.