Q21.12 – Patent foramen ovale
ICD-10-CM 2027 diagnosis code · Congenital malformations of the circulatory system
ICD-10-CM code
Q21.12
- Code
Q21.12(claims format:Q2112)- Description
- Patent foramen ovale
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q20-Q28 Congenital malformations of the circulatory system
- Parent codes
- Q21 › Q21.1
Notes for Q21.12
Applicable to:
- Persistent foramen ovale
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Q21 – Congenital malformations of cardiac septa
Excludes1 (not coded here):
- acquired cardiac septal defect (I51.0)
Q21.1 – Atrial septal defect
Excludes2 (not included here):
- ostium primum atrial septal defect (type I) (Q21.20)
Index terms for Q21.12
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Foramen ovale
- Patent, foramen, ovale
- Patent, foramen, botalli
- Nonclosure, foramen, ovale
- Nonclosure, foramen, botalli
- Closure, foramen ovale, imperfect
- Anomaly, anomalous, foramen, ovale
- Imperfect, closure, foramen, ovale
- Anomaly, anomalous, foramen, Botalli
- Imperfect, closure, foramen, botalli
- Persistence, persistent, foramen, ovale
- Cyanosis, due to, patent foramen botalli
- Persistence, persistent, foramen, Botalli
- Cyanosis, due to, persistent foramen ovale
Related codes in Q21.1
- Q21.10 – Atrial septal defect, unspecifiedBillable
- Q21.11 – Secundum atrial septal defectBillable
- Q21.13 – Coronary sinus atrial septal defectBillable
- Q21.14 – Superior sinus venosus atrial septal defectBillable
- Q21.15 – Inferior sinus venosus atrial septal defectBillable
- Q21.16 – Sinus venosus atrial septal defect, unspecifiedBillable
- Q21.19 – Other specified atrial septal defectBillable
Frequently asked questions
What is ICD-10 code Q21.12?
Q21.12 is the ICD-10-CM code for patent foramen ovale, in the block Q20-Q28 (Congenital malformations of the circulatory system).
Is Q21.12 a billable code?
Yes. Q21.12 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Q21.12 belong to?
It belongs to category Q21 – Congenital malformations of cardiac septa.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.