2026 ICD-10-CM Diagnosis Code Q24.9Congenital malformation of heart, unspecified

ICD-10-CM Codes›Q00-Q99›Q20-Q28›Q24

ICD-10-CM Q24.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q24.9 is a billable ICD-10-CM diagnosis code for congenital malformation of heart, unspecified. 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
Q24.9
Billable Status
Yes — Valid for Submission
Code Describes
Congenital malformation of heart, unspecified
Short Description
Congenital malformation of heart, unspecified
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 CodeQ24.9Congenital malformation of heart, unspecified

Present on Admission (POA)Billing

Q24.9 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.

  • Abnormality of left atrioventricular valve chordae tendinae
  • Acquired abnormality of aorta due to congenital heart anomaly
  • Acrocardiofacial syndrome
  • Acyanotic congenital heart disease
  • Anophthalmia and megalocornea with cardiopathy and skeletal anomalies syndrome
  • Aortic aneurysm due to congenital heart disease
  • Associated pulmonary arterial hypertension
  • Autosomal dominant intellectual disability, craniofacial anomalies, cardiac defects syndrome
  • Beemer Ertbruggen syndrome
  • Blepharophimosis, intellectual disability syndrome
  • Blue skin
  • Brachydactyly, mesomelia, intellectual disability, heart defect syndrome
  • Brain malformation, congenital heart disease, postaxial polydactyly syndrome
  • Cardiac anomaly and heterotaxy syndrome
  • Cardiac urogenital syndrome
  • Cardio-acral-facial syndrome
  • Cardiocranial syndrome Pfeiffer type
  • Cardio-facio-cutaneous syndrome
  • Cardiospondylocarpofacial syndrome
  • Cataract, congenital heart disease, neural tube defect syndrome
  • CDK13-related congenital heart defects, intellectual disability, facial dysmorphism syndrome
  • Central cyanosis
  • Choanal atresia
  • Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome
  • Cleft lip and cleft palate with intestinal malrotation and cardiopathy syndrome
  • Cleft lip and palate, craniofacial dysmorphism, congenital heart defect, hearing loss syndrome
  • Cleft palate, congenital heart defect, intellectual disability syndrome
  • Cognitive impairment, coarse facies, heart defects, obesity, pulmonary involvement, short stature, skeletal dysplasia syndrome
  • Coloboma, congenital heart disease, ichthyosiform dermatosis, intellectual disability ear anomaly syndrome
  • Complex congenital heart defect
  • Congenital abnormality of left atrioventricular valve chordae tendinae in double inlet ventricle
  • Congenital abnormality of relationship of cardiac component
  • Congenital aplasia of lung
  • Congenital cardiovascular disorders during pregnancy, childbirth and the puerperium
  • Congenital cleft hand
  • Congenital conductive hearing loss
  • Congenital dysplasia of radius
  • Congenital heart disease
  • Congenital heart disease in pregnancy
  • Congenital hypoplasia of pancreas
  • Congenital insufficiency of mitral valve
  • Congenital vertebral, cardiac, renal anomalies syndrome
  • Cyanosis of skin
  • Cyanotic attack
  • Cyanotic congenital heart disease
  • Defect of vertebral segmentation
  • Erythrocytosis due to cardiovascular disease
  • Erythrocytosis due to cyanotic congenital heart disease
  • Erythrocytosis due to tissue hypoxemia
  • Eye defects, arachnodactyly, cardiopathy syndrome
  • Facial dysmorphism, conductive hearing loss, heart defect syndrome
  • Genetic syndromic childhood obesity
  • Genitopalatocardiac syndrome
  • Grange syndrome
  • Hadziselimovic syndrome
  • Hamartoma of tongue
  • Heart defect and limb shortening syndrome
  • Heart defect, tongue hamartoma, polysyndactyly syndrome
  • Heart disease in mother complicating pregnancy, childbirth AND/OR puerperium
  • Heart failure due to end stage congenital heart disease
  • Heart-hand syndrome Slovenian type
  • Hereditary dysplasia of blood vessel
  • Hypercyanotic spell due to congenital heart disease
  • Intellectual disability, cardiac anomalies, short stature, joint laxity syndrome
  • Intellectual disability, congenital heart disease, blepharophimosis, blepharoptosis and hypoplastic teeth
  • ITPA-related lethal infantile neurological disorder with cataract and cardiac involvement
  • Lethal brain and heart developmental defects syndrome
  • Lung agenesis with heart defect and thumb anomaly syndrome
  • Marfanoid habitus, facial dysmorphism, skeletal abnormality, heart defect syndrome
  • Marfanoid physique
  • McKusick Kaufman syndrome
  • Mesomelic dysplasia of upper limb
  • Microcephaly, seizure, intellectual disability, heart disease syndrome
  • Multiple congenital cardiac defects
  • Neck webbing
  • Neurodevelopmental disorder, craniofacial dysmorphism, cardiac defect, skeletal anomalies syndrome
  • Pancreatic hypoplasia, diabetes mellitus, congenital heart disease syndrome
  • Pentose disorder
  • PHAVER syndrome
  • Polysyndactyly and cardiac malformation syndrome
  • Pulmonary arterial hypertension associated with congenital heart disease
  • Pure gonadal dysgenesis
  • Pure gonadal dysgenesis 46,XY
  • Sagittal craniosynostosis
  • Secondary hypertension due to congenital heart disorder
  • Short stature with webbed neck and congenital heart disease syndrome
  • Short stature, developmental delay, congenital heart defect syndrome
  • Situs ambiguus
  • Sonoda syndrome
  • Thomas syndrome
  • TMEM94-associated congenital heart defect, facial dysmorphism, developmental delay syndrome
  • TRAF7-associated heart defect, digital anomalies, facial dysmorphism, motor and speech delay syndrome
  • VACTEL syndrome
  • VACTERL syndrome with hydrocephalus
  • Verloove Vanhorick Brubakk syndrome
  • Vertebral abnormalities, anal atresia, cardiac abnormalities, tracheo-esophageal fistula, renal anomalies, limb defects syndrome

Tabular List NotesGuidance

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

Inclusion Terms

  • Congenital anomaly of heart
  • Congenital disease of heart

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.

    • Acyanotic heart disease(congenital)
    • Anomaly, anomalous(congenital) (unspecified type)
      • cardiac
    • Anomaly, anomalous(congenital) (unspecified type)
      • heart
    • Atelocardia
    • Blue
      • baby
    • Cyanotic heart disease
      • congenital
    • Deformity
      • heart (congenital)
    • Development
      • imperfect, congenital
        • heart
    • Disease, diseased
      • heart (organic)
        • congenital
    • Disease, diseased
      • heart (organic)
        • congenital
          • cyanotic
    • Lesion(s) (nontraumatic)
      • cardiac
        • congenital
    • Malformation(congenital)
      • heart

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

Clinical InformationClinical

  • Choanal Atresia

    a congenital abnormality that is characterized by a blocked choanae, the opening between the nose and the nasopharynx. blockage can be unilateral or bilateral; bony or membranous.

  • Age at Diagnosis of Congenital Heart Disease|Age Diagnosed

    the age of the patient when congenital heart disease was diagnosed.

  • Congenital Heart Disease

    a heart disease that is present at birth. representative examples include atrial septal defect, ventricular septal defect, tetralogy of fallot, and patent foramen ovale.

  • Family History of Congenital Heart Disease|Family History of CHD|Family history of CHD

    a history of a first-degree relative with congenital heart disease.

  • History of Congenital Heart Disease|History of CHD

    an abnormality of cardiac structure or function was present at birth.

  • Intervention for Congenital Heart Disease|Intervention(s)

    the treatment the patient had for congenital heart disease.

  • Known History of Congenital Heart Disease|Yes

    an indication that the patient has a history of congenital heart disease.

  • No History of Congenital Heart Disease|No

    an indication that the patient does not have a history of congenital heart disease.

  • Other Presenting Finding of Congenital Heart Disease|Other

    an indication that the patient had a presenting finding of congenital heart disease other than those listed.

  • Presenting Finding of Congenital Heart Disease|Presenting Finding

    the presenting findings of congenital heart disease in the patient.

  • Unknown History of Congenital Heart Disease|Unknown

    an indication that it is unknown whether the patient has a history of congenital heart disease.

  • Adult Congenital Heart Disease Internist

    an internist with additional training/certification in the treatment of adult congenital heart disease.

  • Internal Medicine Adult Congenital Heart Disease Specialist|Internal Medicine Adult Congenital Heart Disease|Internal Medicine Adult Congenital Heart Disease

    an internist with additional training/certification in the treatment of adult congenital heart disease.

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 Q24.9 to ICD-9-CMHistory

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

ICD-9-CM
746.9 Cong heart anomaly NOS
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 Q24.9Overview

Is Q24.9 (Other congenital malformations of heart) a billable code?

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

What MS-DRG does Q24.9 group to?

When congenital malformation of heart, unspecified 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 Q24.9 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 congenital malformation of heart, unspecified on inpatient claims.

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

Under the General Equivalence Mappings, congenital malformation of heart, unspecified converts to ICD-9-CM 746.9 (cong heart anomaly NOS). 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.