2026 ICD-10-CM Diagnosis Code Q24.5Malformation of coronary vessels

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q24

ICD-10-CM Q24.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q24.5 is a billable ICD-10-CM diagnosis code for malformation of coronary vessels. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 306 through 307. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac and circulatory congenital anomalies.

Code Identity

ICD-10-CM Code
Q24.5
Billable Status
Yes — Valid for Submission
Code Describes
Malformation of coronary vessels
Short Description
Malformation of coronary vessels
Same as the full description in the CMS dataset.
Parent Code
Q24
Other congenital malformations of heart

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ20-Q28Congenital malformations of the circulatory system
CategoryQ24Other congenital malformations of heart
This CodeQ24.5Malformation of coronary vessels

Present on Admission (POA)Billing

Q24.5 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Aberrant course of left anterior descending coronary artery from right coronary artery crossing right ventricular outflow tract
  • Abnormal coronary artery course
  • Abnormal ostium of coronary artery
  • Abnormal ostium of coronary sinus
  • Abnormality of right superior vena cava
  • Aneurysm of coronary vessels
  • Anomalous communication of coronary artery
  • Anomalous coronary artery with acute angulation of less than 45 degrees relative to aorta
  • Anomalous coronary artery without acute angulation of less than 45 degrees relative to aorta
  • Anomalous coronary venous return
  • Anomalous course of coronary artery across right ventricular outflow tract
  • Anomalous course of coronary artery anterior to aorta
  • Anomalous course of coronary artery anterior to pulmonary trunk
  • Anomalous course of coronary artery anterior to pulmonary trunk and aorta
  • Anomalous course of coronary artery posterior to aorta
  • Anomalous course of coronary artery posterior to pulmonary trunk
  • Anomalous course of coronary artery posterior to pulmonary trunk and aorta
  • Anomalous course of coronary artery through infundibular septum
  • Anomalous intramural course of proximal portion of coronary artery above aortic sinus
  • Anomalous intramural course of proximal portion of coronary artery across commissure of aortic valve
  • Anomalous intramural course of proximal portion of coronary artery within aortic sinus
  • Anomalous origin of accessory coronary artery from aortic sinus
  • Anomalous origin of accessory coronary artery from pulmonary artery
  • Anomalous origin of circumflex artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of left anterior descending coronary artery and right coronary artery from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of conus artery from separate aortic sinus orifice
  • Anomalous origin of coronary arteries from anterior aortic sinus
  • Anomalous origin of coronary arteries from both aortic sinuses of bicuspid valve
  • Anomalous origin of coronary artery
  • Anomalous origin of coronary artery from aorta
  • Anomalous origin of coronary artery from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of coronary artery from aortic sinus to right of nonfacing aortic sinus
  • Anomalous origin of coronary artery from left pulmonary artery
  • Anomalous origin of coronary artery from non-facing sinus
  • Anomalous origin of coronary artery from pulmonary arterial tree
  • Anomalous origin of coronary artery from right pulmonary artery
  • Anomalous origin of dual left anterior descending coronary arteries
  • Anomalous origin of dual left anterior descending coronary arteries from right coronary artery and left coronary artery
  • Anomalous origin of large conus artery from right coronary artery
  • Anomalous origin of left anterior descending artery and right coronary artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of circumflex artery from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of left anterior descending artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of circumflex artery and right coronary artery from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of left anterior descending coronary artery from pulmonary artery
  • Anomalous origin of left anterior descending coronary artery from right coronary artery aortic sinus
  • Anomalous origin of left anterior descending from right coronary artery
  • Anomalous origin of left circumflex artery from right coronary artery
  • Anomalous origin of left circumflex coronary artery from pulmonary artery
  • Anomalous origin of left circumflex coronary artery from right coronary aortic sinus
  • Anomalous origin of left coronary artery
  • Anomalous origin of left coronary artery and right coronary artery from pulmonary artery
  • Anomalous origin of left coronary artery and right coronary artery with dual orifices from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of left coronary artery and right coronary artery with dual orifices from aortic sinus to right of nonfacing aortic sinus
  • Anomalous origin of left coronary artery from pulmonary artery
  • Anomalous origin of left coronary artery from right coronary aortic sinus
  • Anomalous origin of left coronary artery from right coronary artery
  • Anomalous origin of right coronary artery
  • Anomalous origin of right coronary artery and circumflex artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of left anterior descending artery from aortic sinus to left on nonfacing aortic sinus
  • Anomalous origin of right coronary artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of left coronary artery from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of right coronary artery from left anterior descending coronary artery
  • Anomalous origin of right coronary artery from left circumflex coronary artery
  • Anomalous origin of right coronary artery from left coronary artery
  • Anomalous origin of right coronary artery from left coronary artery aortic sinus
  • Anomalous origin of right coronary artery from left coronary artery aortic sinus and anomalous origin of left coronary artery from right coronary artery aortic sinus
  • Anomalous origin of right coronary artery from pulmonary artery
  • Anomalous origin of single coronary artery from aortic sinus to left of nonfacing aortic sinus
  • Anomalous origin of single coronary artery from aortic sinus to right of nonfacing aortic sinus
  • Anomalous origin of single coronary artery from left coronary artery aortic sinus
  • Anomalous origin of single coronary artery from nonfacing aortic sinus
  • Anomalous origin of single coronary artery from right coronary artery aortic sinus
  • Anomalous origin of sinus node coronary artery from separate aortic sinus orifice
  • Anomalous valve of coronary sinus
  • Aortic left ventricular tunnel
  • Aortic left ventricular tunnel with right coronary artery from tunnel
  • Aortic tunnel
  • Aortopulmonary coronary arterial course
  • Atresia of systemic vein
  • Balanced coronary system
  • Calcification of coronary artery
  • Circumflex runs posterior to aorta
  • Circumflex runs posterior to pulmonary trunk
  • Common coronary artery orifice
  • Completely unroofed coronary sinus defect in left atrium
  • Congenital abnormal number of coronary ostia
  • Congenital abnormality of great veins and coronary sinus
  • Congenital abnormality of hepatic vein
  • Congenital absence of coronary artery
  • Congenital absence of coronary sinus
  • Congenital anomaly of coronary artery
  • Congenital atresia of cardiac vein
  • Congenital atresia of coronary ostium
  • Congenital atresia of left main stem coronary artery
  • Congenital atresia of right coronary artery orifice
  • Congenital coronary aneurysm
  • Congenital coronary arteriovenous fistula
  • Congenital coronary artery calcification
  • Congenital coronary artery fistula
  • Congenital coronary artery fistula to left atrium
  • Congenital coronary artery fistula to left ventricle
  • Congenital coronary artery fistula to pulmonary artery
  • Congenital coronary artery fistula to right atrium
  • Congenital coronary artery fistula to right ventricle
  • Congenital coronary artery sclerosis
  • Congenital coronary sinus stenosis
  • Congenital occlusion of coronary sinus
  • Congenital stenosis of coronary artery
  • Congenital stenosis of coronary ostium
  • Congenital stenosis of distal coronary artery
  • Congenital stricture of artery
  • Coronary artery arising from main pulmonary artery
  • Coronary artery fistula to left atrium
  • Coronary artery fistula to left ventricle
  • Coronary artery fistula to right atrium
  • Coronary artery fistula to right ventricle
  • Coronary artery orifice abnormally low
  • Coronary artery patency - finding
  • Coronary artery patent
  • Coronary artery runs between aorta and pulmonary trunk
  • Coronary orifice abnormally high
  • Coronary orifice asymmetrical
  • Coronary ostium stenosis
  • Coronary sinus defect in left atrium
  • Coronary sinus drainage cephalad to left superior caval vein
  • Coronary sinus drainage cephalad to right superior caval vein
  • Coronary sinus orifice atresia
  • Coronary sinus to left ventricle fistula
  • Coronary stricture
  • Diverticulum of coronary sinus
  • Double barrel dual coronary artery orifices within aortic sinus
  • Dual coronary orifice
  • Fistula of coronary sinus
  • Hepatic vein to coronary sinus
  • Interruption of coronary artery
  • Intramural coronary artery course
  • Left dominant coronary system
  • Malposition of coronary artery orifice
  • Obstruction of coronary sinus
  • Occlusion of coronary sinus
  • Right dominant coronary system
  • Right superior caval vein connecting to coronary sinus
  • Single coronary artery
  • Single coronary artery dividing into right coronary artery and left coronary artery
  • Single left coronary artery supplying all of heart with usual distribution of right coronary artery derived from distal left coronary artery
  • Single right coronary artery supplying all of heart with usual distribution of left coronary artery derived from distal right coronary artery
  • Stricture of artery
  • Systemic to coronary collateral artery
  • Systemic to pulmonary collateral artery from coronary artery
  • Truncal arteriovenous fistula
  • Variant coronary origin from aortic sinus
  • Variant dominance of coronary circulation
  • Venous valvular anomaly
  • Widely spaced right coronary artery and left coronary artery orifices within single aortic sinus

Tabular List NotesGuidance

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

Inclusion Terms

  • Congenital coronary (artery) aneurysm

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Aberrant(congenital)
      • artery (peripheral)
        • coronary
    • Abnormal, abnormality, abnormalities
      • coronary artery
    • Absence(of) (organ or part) (complete or partial)
      • artery (congenital) (peripheral)
        • coronary
    • Accessory(congenital)
      • blood vessels NEC
        • coronary
    • Accessory(congenital)
      • coronary artery
    • Agenesis
      • artery (peripheral)
        • coronary
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • congenital (peripheral)
        • coronary
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • coronary (arteriosclerotic) (artery)
        • arteriovenous, congenital
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • coronary (arteriosclerotic) (artery)
        • congenital
    • Anomaly, anomalous(congenital) (unspecified type)
      • arteriovenous NEC
        • coronary
    • Anomaly, anomalous(congenital) (unspecified type)
      • artery (peripheral)
        • coronary
    • Anomaly, anomalous(congenital) (unspecified type)
      • communication
        • coronary artery
    • Anomaly, anomalous(congenital) (unspecified type)
      • coronary artery or vein
    • Anomaly, anomalous(congenital) (unspecified type)
      • distribution, coronary artery
    • Anomaly, anomalous(congenital) (unspecified type)
      • valve (heart) NEC
        • coronary sinus
    • Anomaly, anomalous(congenital) (unspecified type)
      • valve (heart) NEC
        • sinus coronario
    • Anomaly, anomalous(congenital) (unspecified type)
      • vein (s) (peripheral)
        • coronary
    • Atresia, atretic
      • artery NEC
        • coronary
    • Bridge, myocardial
    • Deformity
      • artery (congenital) (peripheral) NOS
        • coronary (acquired)
          • congenital
    • Deformity
      • coronary artery (acquired)
        • congenital
    • Disease, diseased
      • coronary (artery)
        • congenital
    • Distortion(s) (congenital)
      • coronary
    • Distribution vessel, atypical
      • coronary artery
    • Fistula(cutaneous)
      • arteriovenous (acquired) (nonruptured)
        • congenital (peripheral)
          • coronary
    • Fistula(cutaneous)
      • arteriovenous (acquired) (nonruptured)
        • coronary
          • congenital
    • Fistula(cutaneous)
      • coronary, arteriovenous
        • congenital
    • Hypoplasia, hypoplastic
      • artery (peripheral)
        • coronary
    • Malformation(congenital)
      • coronary vessels
    • Malposition
      • congenital
        • artery (peripheral)
          • coronary
    • Narrowing
      • artery
        • coronary
          • congenital
    • Single
      • coronary artery
    • Stricture
      • artery
        • congenital (peripheral)
          • coronary
    • Stricture
      • artery
        • coronary
          • congenital

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL001
Cardiac and circulatory congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

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.

Convert Q24.5 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
746.85 Coronary artery anomaly
Approximate The match is approximate rather than exact.

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 Q24.5Overview

Is Q24.5 (Other congenital malformations of heart) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report malformation of coronary vessels on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q24.5 group to?

When malformation of coronary vessels is the principal diagnosis on an inpatient stay, it groups to MS-DRG 306, 307, with relative weights from 0.9132 to 1.5758 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q24.5 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for malformation of coronary vessels on inpatient claims.

What is the ICD-9 equivalent of Q24.5?

Under the General Equivalence Mappings, malformation of coronary vessels converts to ICD-9-CM 746.85 (coronary artery anomaly). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.