Is ICD-10-CM code Q24 billable?

No, Q24 (Other congenital malformations of heart) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Q24 belong to?

Q24 belongs to Chapter 17 of the ICD-10-CM tabular list: Q00–Q99 (Congenital Malformations, Deformations and Chromosomal Abnormalities).

Q24Not billable, use a more specific code below

Other congenital malformations of heart

In Congenital malformations of the circulatory system (Q20-Q28), chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities

9 billable codes under Q24: 3 are an MCC, 4 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Excludes1: not coded here, use a different code

endocardial fibroelastosis (I42.4)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Assign Q00-QA1 codes for documented congenital anomalies or genetic disorders at any age, coding non-inherent manifestations separately and sequencing Z38 first on the birth admission.

Read Section I.C.17 (page 74)

All codes under Q24

Q24 can't be used on a claim. Pick a billable code below; grey headings group them.

Q24 MS-DRGs

As the principal diagnosis, the billable codes under Q24 group to MS-DRG 306, 307, 308, 309, or 310 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 306 Cardiac Congenital and Valvular Disorders with MCC (8 of 9 codes)
DRG 307 Cardiac Congenital and Valvular Disorders without MCC (8 of 9 codes)
DRG 308 Cardiac Arrhythmia and Conduction Disorders with MCC (1 of 9 codes)
DRG 309 Cardiac Arrhythmia and Conduction Disorders with CC (1 of 9 codes)
DRG 310 Cardiac Arrhythmia and Conduction Disorders without CC/MCC (1 of 9 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.