2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Congenital malformations of larynx
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q31: its own notes plus those printed at Chapter 17. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • congenital laryngeal stridor NOS (P28.89)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • inborn errors of metabolism (E70-E88)

Notes

General instructions on how these codes are used.

From Chapter 17 (Q00-QA1) Congenital malformations, deformations and chromosomal abnormalities applies to 900 codes
  • Codes from this chapter are not for use on maternal records

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Q31, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming Q31: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block Q10-Q18 Congenital malformations of eye, ear, face and neck
    congenital malformation of larynx (Q31.-)

Code Also 1

These codes say Q31 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • P28 Other respiratory conditions originating in the perinatal period
    if applicable, congenital malformations of the respiratory system (Q30-Q34) names Q30-Q34, which includes this code

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Q31Overview

What is the ICD-10 code for congenital malformations of larynx?

Q31 is the ICD-10-CM category for congenital malformations of larynx, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can Q31 be reported with P28.89?

Not as a rule. The Excludes1 note on Q31 lists "congenital laryngeal stridor NOS (P28.89)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).