2027 ICD-10-CM Diagnosis Code Q24Other congenital malformations of heart

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q24

ICD-10-CM Q24
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Q24 is a non-billable ICD-10-CM category code for other congenital malformations of heart, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Q24.0, Q24.1, Q24.2, and Q24.3.

Code Identity

ICD-10-CM Code
Q24
Billable Status
No — Non-Billable Category
Code Describes
Other congenital malformations of heart
Short Description
Other congenital malformations of heart
Same as the full description in the CMS dataset.
Chapter
Q20-Q28
Congenital malformations of the circulatory system

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ20-Q28Congenital malformations of the circulatory system
CategoryQ24Other congenital malformations of heart
This CodeQ24Other congenital malformations of heart

Specific Coding for Other congenital malformations of heartOverview

Non-specific codes like Q24 require more characters. Use one of these billable codes instead:

  • Use Q24.0 for Dextrocardia

  • Use Q24.1 for Levocardia

  • Use Q24.2 for Cor triatriatum

  • Use Q24.3 for Pulmonary infundibular stenosis

  • Use Q24.4 for Congenital subaortic stenosis

  • Use Q24.5 for Malformation of coronary vessels

  • Use Q24.6 for Congenital heart block

  • Use Q24.8 for Other specified congenital malformations of heart

  • Use Q24.9 for Congenital malformation of heart, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Q24: 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.

  • endocardial fibroelastosis (I42.4)

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 Q24, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and Q24 is one of the codes named.

  • Q87.88 CTNNB1 syndrome
    congenital heart malformations (Q20.0-Q24.9) names Q20.0-Q24.9, which includes this code

Patient EducationClinical

Congenital Heart Defects

Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a fetus's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect.

The full article covers:

  • What are congenital heart defects?
  • What causes congenital heart defects?
  • Who is more likely to have a baby with a congenital heart defect?
  • What are the symptoms of congenital heart defects?
  • What other problems do congenital heart defects cause?
  • How are congenital heart defects diagnosed?
  • What are the treatments for congenital heart defects?

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 Q24Overview

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

Q24 is the ICD-10-CM category for other congenital malformations of heart, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Q24 (Other congenital malformations of heart) a billable code?

No. This is a category header that groups the codes for other congenital malformations of heart, and headers cannot be submitted on claims. Claims for other congenital malformations of heart need a more specific code from this category, such as Q24.0, Q24.1, and Q24.2.

Can Q24 be reported with I42.4?

Not as a rule. The Excludes1 note on Q24 lists "endocardial fibroelastosis (I42.4)". 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).