2026 ICD-10-CM Diagnosis Code Q31Congenital malformations of larynx

ICD-10-CM Codes›Q00-Q99›Q30-Q34›Q31

ICD-10-CM Q31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q31 is a non-billable ICD-10-CM category code for congenital malformations of larynx, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q31.0, Q31.1, Q31.2, and Q31.3.

Code Identity

ICD-10-CM Code
Q31
Billable Status
No — Non-Billable Category
Code Describes
Congenital malformations of larynx
Chapter
Q30-Q34
Congenital malformations of the respiratory system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ30-Q34Congenital malformations of the respiratory system
CategoryQ31Congenital malformations of larynx
This CodeQ31Congenital malformations of larynx

Specific Coding for Congenital malformations of larynxOverview

Non-specific codes like Q31 require more characters. Use one of these billable codes instead:

  • Use Q31.0 for Web of larynx

  • Use Q31.1 for Congenital subglottic stenosis

  • Use Q31.2 for Laryngeal hypoplasia

  • Use Q31.3 for Laryngocele

  • Use Q31.5 for Congenital laryngomalacia

  • Use Q31.8 for Other congenital malformations of larynx

  • Use Q31.9 for Congenital malformation of larynx, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • congenital laryngeal stridor NOS P28.89

Patient EducationClinical

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

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 Q31Overview

Is Q31 (Congenital malformations of larynx) a billable code?

No. This is a category header that groups the codes for congenital malformations of larynx, and headers cannot be submitted on claims. Claims for congenital malformations of larynx need a more specific code from this category, such as Q31.0, Q31.1, and Q31.2.