Q23.81

Bicuspid aortic valve

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · Q23.81

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)

Synonyms

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

Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities

Excludes 2

inborn errors of metabolism (E70-E88)

Note

Codes from this chapter are not for use on maternal records

Official Guidelines for Q23.81

FY 2026 ›

I.C.17Chapter-specific guidanceChapter 17: Congenital malformations, deformations, and chromosomal abnormalities (Q00-QA1)

Sections that reference Q23.81

IV.QEncounters for routine health screeningsOutpatient services
… Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. …

Sections whose FY 2026 text names Q23.81, its Q23 category, or a range containing it — the chapter guidance above is the authoritative source.

Find Q23.81 in the alphabetic index

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