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ICD-10 Code Q24.9: Congenital malformation of heart, unspecified

Q24.9 is a billable ICD-10 diagnosis code used to classify Congenital malformation of heart, unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

When is it used?

  • May be used when a clinician documents congenital malformation of heart, unspecified in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
17Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
block
Q20-Q28Congenital malformations of the circulatory system
category
Q24Other congenital malformations of heart
currentQ24

Official coding notes

Inclusion terms
  • Congenital anomaly of heart
  • Congenital disease of heart

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

ENT SpecialistCardiologist

Coverage-related procedures and services

CPT 75574high
COMPUTED TOMOGRAPHIC ANGIOGRAPHY, HEART, CORONARY ARTERIES AND BYPASS GRAFTS (WHEN PRESENT), WITH CONTRAST MATERIAL, INCLUDING 3D IMAGE POSTPROCESSING (INCLUDING EVALUATION OF CARDIAC STRUCTURE AND MORPHOLOGY, ASSESSMENT OF CARDIAC FUNCTION, AND EVALUATION OF VENOUS STRUCTURES, IF PERFORMED)
Source: CMS coverage guidance
CPT 75572high
COMPUTED TOMOGRAPHY, HEART, WITH CONTRAST MATERIAL, FOR EVALUATION OF CARDIAC STRUCTURE AND MORPHOLOGY (INCLUDING 3D IMAGE POSTPROCESSING, ASSESSMENT OF CARDIAC FUNCTION, AND EVALUATION OF VENOUS STRUCTURES, IF PERFORMED)
Source: CMS coverage guidance
CPT 75573high
COMPUTED TOMOGRAPHY, HEART, WITH CONTRAST MATERIAL, FOR EVALUATION OF CARDIAC STRUCTURE AND MORPHOLOGY IN THE SETTING OF CONGENITAL HEART DISEASE (INCLUDING 3D IMAGE POSTPROCESSING, ASSESSMENT OF LEFT VENTRICULAR [LV] CARDIAC FUNCTION, RIGHT VENTRICULAR [RV] STRUCTURE AND FUNCTION AND EVALUATION OF VASCULAR STRUCTURES, IF PERFORMED)
Source: CMS coverage guidance
CPT 75571high
COMPUTED TOMOGRAPHY, HEART, WITHOUT CONTRAST MATERIAL, WITH QUANTITATIVE EVALUATION OF CORONARY CALCIUM
Source: CMS coverage guidance
HCPCS J0153high
INJECTION, ADENOSINE, 1 MG (NOT TO BE USED TO REPORT ANY ADENOSINE PHOSPHATE COMPOUNDS)
Source: CMS coverage guidance
HCPCS J0280high
INJECTION, AMINOPHYLLIN, UP TO 250 MG
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
Q24.9

Common synonyms

Congenital malformation of heart, unspecifiedCongenital malformation of heart

Frequently asked questions

Code details

CodeQ24.9
SystemICD10
Display nameCongenital malformation of heart, unspecified
ChapterCongenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
BlockCongenital malformations of the circulatory system

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Acyanotic heart disease(congenital)Anomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)AtelocardiaBlueCyanotic heart diseaseDeformityDevelopmentDisease, diseasedDisease, diseasedLesion(s) (nontraumatic)Malformation(congenital)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code Q24.9 for Congenital malformation of heart, unspecified | HealthAssure