Q25.40 — Congenital malformation of aorta unspecified
Q25.40 is a billable, specific ICD-10-CM code for congenital malformation of aorta unspecified. It is valid for submission on a claim.
Risk adjustment
Q25.40 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
Q25.40 is named in 16 Medicare coverage policies — 16 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
- A56625Billing and Coding: Echocardiography
How Q25.40 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q25.40.
- Anomaly, anomalous›aorta NEC(arch)
- Deformity›aorta(arch) (congenital)
- Malformation›aorta
Related codes at this level
Codes that share Q25.4. If Q25.40 is not quite right, the correct code is usually one of these.
Questions about Q25.40
- Is Q25.40 a billable ICD-10-CM code?
- Yes. Q25.40 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q25.40 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).