Q23.81

Billable code

Bicuspid aortic valve

The ICD-10 code for bicuspid aortic valve is Q23.81.

Clinical notes

Code also

Two codes may be needed to fully describe a condition, but unlike Code First/Use Additional Code, the sequencing order is not mandated by convention.

, 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)

Also known as

Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.

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

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Related codes in this category

Q23.82Congenital mitral valve cleft leaflet
Q23.88Other congenital malformations of aortic and mitral valves
Q23.81Bicuspid aortic valve

Associated MS-DRGs

Q23.81 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.