Tracking this diagnosis for someone you care for? Eleplan keeps diagnoses, medications and appointments in one plan.
Start free with EleplanQ23
Non-billableCongenital malformations of aortic and mitral valves
Q23 is the ICD-10-CM code for Congenital malformations of aortic and mitral valves. It is a non-billable category code — use a more specific child code such as Q23.0 for billing.
- Status
- Header (non-billable)
- Chapter
- Q00-Q99
- Subcodes
- 7
- Edition
- FY2026
Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
What this means — in plain language
MedlinePlus · NIHWhat are congenital heart defects? Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a fetus's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect . Congenital heart defects can change the way the heart pumps blood. They may make blood…
Read more about Congenital Heart Defects at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
19 rare diseases filed under this code
Orphanet · INSERMICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. This code is shared — showing 12 of 19.
Orphadata Science: Free access data from Orphanet. © INSERM 1999. 3 of these are exact ICD-10 matches; the rest are broader-bucket mappings.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition