AutoICD API

Q21.8

Billable

Other congenital malformations of cardiac septa

Other congenital malformations of cardiac septa

Status

Billable / Specific

Parent Code

Q21

ICD-11 Mapping

1 equivalent

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Eisenmenger's defect
  • Pentalogy of Fallot

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

Excludes 2

Conditions not included here, but the patient may have both

Code Also

A second code may be required; sequencing depends on circumstances

Related Codes(6)
Q21.0

Ventricular septal defect

BillableQ21.1

Atrial septal defect

Q21.2

Atrioventricular septal defect

Q21.3

Tetralogy of Fallot

BillableQ21.4

Aortopulmonary septal defect

BillableQ21.9

Congenital malformation of cardiac septum, unspecified

Billable
ICD-11 Equivalents(1)

ICD-11 Equivalents

View full mapping

Corresponding ICD-11 codes from the WHO crosswalk mapping

LA8ZStructural developmental anomaly of heart or great vessels, unspecifiedequivalentPrimary
Also Known As / Clinical Terms(100)

SNOMED CT

UMLS

Clinical Terms

  • Pentalogy of Fallot
  • Left ventricle outflow tract obstruction due to deviated septum
  • Common atrioventricular valve with unbalanced commitment of valve to ventricle
  • Congenital aneurysm of heart
  • Right ventricular outflow tract obstruction due to aneurysm of membranous septum
  • Premature closure of foramen ovale
  • Pentalogy of Fallot (disorder)
  • Eisenmenger's complex (disorder)
  • fallot's pentalogy
  • eisenmengers complex
  • Eisenmenger's complex
  • Eisenmenger Complex
  • Ventricular septal aneurysm
  • Eisenmenger Syndrome
  • pentalogy fallot
  • Restriction of fetal foramen ovale
  • Eisenmenger's syndrome (disorder)
  • Congenital interventricular septum aneurysm
  • Eisenmengers Syndrome
  • Closure of foetal foramen ovale
  • Posterior deviation of infundibular septum of obstructive aortic arch type
  • Common atrioventricular valve with unbalanced commitment of valve to right ventricle
  • Tetralogy of Fallot
  • Spontaneous closure of ventricular septal defect due to prolapse of cusp of aortic valve
  • Syndrome, Eisenmenger's
  • Subpulmonic stenosis, ventricular septal defect, overriding aorta, AND right ventricular hypertrophy
  • Closure of fetal foramen ovale
  • Complex, Eisenmenger
  • eisenmenger's syndrome
  • Congenital aneurysm of membranous septum
  • TOF - Tetralogy of Fallot
  • Restriction of foetal foramen ovale
  • Syndrome, Eisenmenger
  • Left ventricular outflow tract obstruction due to malaligned outlet septum
  • Spontaneous closure of ventricular septal defect
  • Fallot's tetralogy
  • Complex, Eisenmenger's
  • Aneurysm of membranous septum
  • Congenital aneurysm of membranous portion of interventricular septum
  • Premature restriction of foramen ovale
  • Ventricular septal defect, spontaneous closure
  • Eisenmenger's defect
  • Bulbus cordis and cardiac septal closure anomalies
Frequently Asked Questions
What is the ICD-10 code for other congenital malformations of cardiac septa?

The ICD-10-CM code for other congenital malformations of cardiac septa is Q21.8. The full clinical description is "Other congenital malformations of cardiac septa". Q21.8 is a billable/specific code that can be used on insurance claims and medical billing.

What does ICD-10 code Q21.8 mean?

ICD-10-CM code Q21.8 represents “Other congenital malformations of cardiac septa”. It is classified under Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities and is a billable/specific code that can be used on a claim.

Is Q21.8 a billable code?

Yes, Q21.8 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is Q21.8 in?

Q21.8 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).

What codes cannot be used with Q21.8?

Q21.8 has Excludes1 notes indicating codes that cannot be used together with it, including: acquired cardiac septal defect (I51.0).

What SNOMED CT codes does Q21.8 map to?

Q21.8 maps to 16 SNOMED CT concepts: 264503005, 268174004, 19249002, 871624004, 871622000, and 11 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for Q21.8?

Q21.8 is linked to 3 UMLS Concept Unique Identifiers: C0013743, C0344883, C0477995. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

How does Q21.8 relate to ICF functioning codes?

ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like other congenital malformations of cardiac septa affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.

What is the ICD-11 equivalent of Q21.8?

Q21.8 maps to the ICD-11 code: LA8Z (Structural developmental anomaly of heart or great vessels, unspecified).

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.