Q23.81 – Bicuspid aortic valve

ICD-10-CM 2027 diagnosis code · Congenital malformations of the circulatory system

Billable code

ICD-10-CM code Q23.81

Code: Q23.81 (claims format: Q2381)
Description: Bicuspid aortic valve
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: Q23 › Q23.8

Notes for Q23.81

Applicable to:

Congenital bicuspid aortic valve
Unicuspid (congenital) aortic valve (at birth)

Code also:

, if applicable, acquired aortic valve disorders, such as:
aortic (valve) insufficiency (nonrheumatic) (I35.1)
aortic (valve) stenosis (nonrheumatic) (I35.0)
aortic (valve) stenosis with insufficiency (nonrheumatic) (I35.2)

Index terms for Q23.81

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Q23.8

Frequently asked questions

What is ICD-10 code Q23.81?

Q23.81 is the ICD-10-CM code for bicuspid aortic valve, in the block Q20-Q28 (Congenital malformations of the circulatory system).

Is Q23.81 a billable code?

Yes. Q23.81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Q23.81 belong to?

It belongs to category Q23 – Congenital malformations of aortic and mitral valves.

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.