AutoICD API

Q21.20

Billable

Atrioventricular septal defect, unsp as to part or complete

Atrioventricular septal defect, unspecified as to partial or complete

Status

Billable / Specific

Parent Code

Q21.2

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Atrioventricular canal, NOS
  • Endocardial cushion defect NOS
  • Ostium primum atrial septal defect (type I) NOS

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

Related Codes(3)
Q21.21

Partial atrioventricular septal defect

BillableQ21.22

Transitional atrioventricular septal defect

BillableQ21.23

Complete atrioventricular septal defect

Billable
Also Known As / Clinical Terms(205)

SNOMED CT

UMLS

Clinical Terms

  • Spontaneous closure of atrial component of atrioventricular septal defect
  • Houlston Ironton Temple syndrome
  • ECD
  • Endocardial cushion defects
  • Thickened atrioventricular valve leaflet in atrioventricular septal defect
  • Atrioventricular septal defect with atrioventricular valve regurgitation through right anterosuperior superior bridging leaflet commissure
  • Atrioventricular septal defect with atrioventricular valve regurgitation through right anterosuperior inferior mural commissure
  • Atrioventricular septal defect with dominant right ventricle
  • Complete atrioventricular canal defect
  • Atrioventricular septal defect with ventricular imbalance
  • Atrioventricular septal defect, blepharophimosis, radial and anal defect syndrome
  • Primum atrial septal defect
  • Abnormality of atrioventricular valve leaflet in atrioventricular septal defect
  • Congenital absence of atrial septum
  • ASD1 - Primum atrial septal defect
  • Atrioventricular septal defect: atrial and ventricular components
  • Deficiency of atrioventricular valve leaflet in atrioventricular septal defect
  • Ventricular septal defect, spontaneous closure
  • Atrioventricular septal defect with ventricular component under superior bridging leaflet with chords at crest ventricular septum
  • Congenital abnormality of atrioventricular valve papillary muscle in atrioventricular septal defect
  • Defects, Endocardial Cushion
  • Noncoapting atrioventricular valve leaflet in atrioventricular septal defect
  • Common atrioventricular canal (disorder)
  • Persistent Atrioventricular Canal
  • Complete atrioventricular septal defect
  • Endocardial cushion defect
  • Complete atrioventricular canal
  • Complete common AV canal
  • Defect, Endocardial Cushion
  • Atrioventricular septal defect - isolated atrial component
  • Atrioventricular septal defect with ventricular component under inferior bridging leaflet with chords to crest ventricular septum
  • Ostium primum atrial septal defect (type I) NOS
  • atrioventricular canal
  • Atrioventricular septal defect with atrioventricular valve regurgitation through right septal commissure
  • Common atrioventricular valve
  • Atrioventricular septal defect with ventricular component and interchordal shunting under inferior bridging leaflet
  • Endocardial cushion defect (disorder)
  • Endocardial cushion defect, complete type
  • Endocardial cushion defect, unspecified type
  • Atrioventricular septal defect - Rastelli C
  • Atrioventricular septal defect with ventricular component and shunting under connecting tongue with separate orifices
  • Partial atrioventricular septal defect
  • Residual interatrial communication
  • Spontaneous closure of ventricular septal defect due to accessory tissue of atrioventricular valve
  • Ostium primum defect
  • Atrioventricular septal defect with balanced ventricles
  • Gelatinous atrioventricular valve leaflet in atrioventricular septal defect
  • Atrioventricular septal defect - ventricular component under inferior bridging leaflet
  • Atrioventricular septal defect with atrioventricular valve regurgitation through right inferior bridging leaflet inferior mural commissure
  • Atrioventricular septal defect with atrioventricular valve regurgitation through left superior bridging leaflet lateral mural commissure
  • Common atrium
  • Cushion Defect, Endocardial
  • Atrioventricular septal defect with dominant left ventricle
  • Atrioventricular septal defect with atrioventricular valve regurgitation through left inferior bridging leaflet lateral mural commissure
  • Common atrioventricular-type ventricular septal defect
  • Atrial septum primum defect
  • Ostium primum atrial septal defect (type I)
  • Atrioventricular septal defect - ventricular component
  • Atrioventricular canal, NOS
  • Persistent ostium primum
  • Endocardial cushion defect NOS
  • canal atrioventricular
  • Partial atrioventricular septal defect with isolated ventricular component
  • Atrioventricular septal defect - ventricular component under superior bridging leaflet
  • Atrioventricular septal defect with atrioventricular valve regurgitation through left septal commissure
  • Atrioventricular septal defect with additional muscular ventricular septal defect
  • Atrioventricular septal defect with ventricular imbalance consisting of dominant right ventricle and hypoplastic left ventricle
  • Atrioventricular septal defect with ventricular component and interchordal shunting under superior bridging leaflet
  • Spontaneous closure of ventricular septal defect
  • Atrioventricular septal defect - isolated ventricular component
  • Atrioventricular septal defect with ventricular imbalance consisting of dominant left ventricle and hypoplastic right ventricle
  • Congenital AVSD (atrioventricular septal defect)
  • Congenital abnormality of atrioventricular valve leaflet in atrioventricular septal defect
  • Flail atrioventricular valve leaflet in atrioventricular septal defect
  • Ventricular imbalance
  • Atrioventricular septal defect with ventricular component under superior bridging leaflet without chordal attachment to ventricular septal crest
  • Common atrioventricular canal
  • Atrioventricular septal defect with separate atrioventricular orifices
  • Atrioventricular septal defect with restrictive ventricular component
  • Fenestration of atrioventricular valve leaflet in atrioventricular septal defect
  • 1 ASD - Primum atrial septal defect
  • ASD I - Primum atrial septal defect
  • Congenital abnormality of atrioventricular valves in atrioventricular septal defect
  • Atrioventricular septal defect associated with tetralogy of Fallot
  • Atrioventricular septal defect - Rastelli A
  • Atrioventricular septal defect with ventricular component under free floating superior bridging leaflet and chords to papillary muscle at right ventricular free wall
  • Atrioventricular canal type ventricular septal defect
  • Atrioventricular septal defect with atrial and ventricular components and separate atrioventricular valves
  • Atrioventricular septal defect with atrioventricular valve regurgitation
  • Cor triloculare biventriculare
  • Congenital atrioventricular septal defect
  • Spontaneous closure of ventricular component of atrioventricular septal defect
  • Atrioventricular septal defect with ventricular component under superior bridging leaflet with chords to papillary muscle on right ventricular side septum
  • Atrioventricular septal defect - Rastelli B
  • Cushion Defects, Endocardial
  • Mass associated with atrioventricular valve leaflet in atrioventricular septal defect
Frequently Asked Questions
What is the ICD-10 code for atrioventricular septal defect, unsp as to part or complete?

The ICD-10-CM code for atrioventricular septal defect, unsp as to part or complete is Q21.20. The full clinical description is "Atrioventricular septal defect, unspecified as to partial or complete". Q21.20 is a billable/specific code that can be used on insurance claims and medical billing.

What does ICD-10 code Q21.20 mean?

ICD-10-CM code Q21.20 represents “Atrioventricular septal defect, unspecified as to partial or complete”. 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 Q21.20 a billable code?

Yes, Q21.20 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is Q21.20 in?

Q21.20 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).

What codes cannot be used with Q21.20?

Q21.20 has Excludes1 notes indicating codes that cannot be used together with it, including: acquired cardiac septal defect (I51.0).

What SNOMED CT codes does Q21.20 map to?

Q21.20 maps to 55 SNOMED CT concepts: 253373002, 449388008, 17718000, 360481003, 253419007, and 50 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for Q21.20?

Q21.20 is linked to 4 UMLS Concept Unique Identifiers: C0014116, C0221215, C5675464, C2910128. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

How does Q21.20 relate to ICF functioning codes?

ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like atrioventricular septal defect, unsp as to part or complete 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 Q21.20?

There is no direct ICD-11 mapping available for Q21.20 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.

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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.