FY2024
Effective from
- Code-level rules changed
Atrial septal defect
Category — select a more specific code
CDC/NCHS · FY2024acquired cardiac septal defect (I51.0)
ostium primum atrial septal defect (type I) (Q21.20)
For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗First observed · 2015-10-01
Latest recorded change · FY2024
Effective from
Atrial septal defect
Category — select a more specific code
CDC/NCHS · FY2024| All editions | Effective from | Code history |
|---|---|---|
| FY2016 | 2015-10-01 | First observed |
| FY2017 | 2016-10-01 | No tabular change |
| FY2018 | 2017-10-01 | No tabular change |
| FY2019 | 2018-10-01 | Inherited rules changed |
| FY2020 | 2019-10-01 | No tabular change |
| FY2020 · April | 2020-04-01 | No tabular change |
| FY2021 | 2020-10-01 | No tabular change |
| FY2021 · 01-01 | 2021-01-01 | No tabular change |
| FY2022 | 2021-10-01 | No tabular change |
| FY2022 · 04-01 | 2022-04-01 | No tabular change |
| FY2023 | 2022-10-01 | Specificity changed · Code-level rules changed |
| FY2023 · 04-01 | 2023-04-01 | No tabular change |
| FY2024 | 2023-10-01 | Code-level rules changed |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | No tabular change |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
Historical mapping only; not an automatic code substitution.
ostium primum atrial septal defect (type I) (Q21.20)
Codes from this chapter are not for use on maternal records
acquired cardiac septal defect (I51.0)
Q21.10Atrial septal defect, unspecifiedBillable / specificQ21.11Secundum atrial septal defectBillable / specificQ21.12Patent foramen ovaleBillable / specificQ21.13Coronary sinus atrial septal defectBillable / specificQ21.14Superior sinus venosus atrial septal defectBillable / specificQ21.15Inferior sinus venosus atrial septal defectBillable / specificQ21.16Sinus venosus atrial septal defect, unspecifiedBillable / specificQ21.19Other specified atrial septal defectBillable / specificOther entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| Q21.0 | Ventricular septal defect | Billable / specific |
| Q21.2 | Atrioventricular septal defect | Category · further specificity required |
| Q21.3 | Tetralogy of Fallot | Billable / specific |
| Q21.4 | Aortopulmonary septal defect | Billable / specific |
| Q21.8 | Other congenital malformations of cardiac septa | Billable / specific |
| Q21.9 | Congenital malformation of cardiac septum, unspecified | Billable / specific |
Official titles and instructions are preserved in their source language. Official sources ↗
Code also · atrial septal defect (Q21.1-)