Is Q24.4 a billable ICD-10-CM code?

Yes. Q24.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q24.4 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).

Q24.4

Q24.4 — Congenital subaortic stenosis

Billable / specific codeICD-10-CMPOA exempt

Q24.4 is a billable, specific ICD-10-CM code for congenital subaortic stenosis. It is valid for submission on a claim.

Other codes that can never be billed with Q24.4

These codes carry an Excludes1 note pointing at Q24.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q24.4 alone.

Q23.0Congenital stenosis of aortic valve

Risk adjustment

Q24.4 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

Q24.4 is named in 26 Medicare coverage policies — 26 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)
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)

How Q24.4 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 Q24.4.

Stenosis, stenotic›subaortic(congenital)
Stricture›subaortic
Anomaly, anomalous›heart›valve NEC›aortic›stenosis›subaortic

Related codes at this level

Codes that share Q24. If Q24.4 is not quite right, the correct code is usually one of these.

Questions about Q24.4

Is Q24.4 a billable ICD-10-CM code?: Yes. Q24.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q24.4 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).