Q23.0
Billable codeCongenital stenosis of aortic valve
The ICD-10 code for congenital stenosis of aortic valve is Q23.0.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
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 aortic atresia
- Congenital aortic stenosis NOS
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Laterality-specific codes exist for this condition — confirm the affected side is documented.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Q23.1Congenital insufficiency of aortic valve
- Q23.2Congenital mitral stenosis
- Q23.3Congenital mitral insufficiency
- Q23.4Hypoplastic left heart syndrome
- Q23.8Other congenital malformations of aortic and mitral valvesnon-billable header
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
- Q23.0Congenital stenosis of aortic valve
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 7463
Associated MS-DRGs
Q23.0 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.