Q23.8
Other congenital malformations of aortic and mitral valves
Header / non-billable
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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
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 Q23.8
FY 2026 ›Sections that reference Q23.8
Sections whose FY 2026 text names Q23.8, its Q23 category, or a range containing it — the chapter guidance above is the authoritative source.