Is Q20.3 a billable ICD-10-CM code?

Yes. Q20.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q20.3 sit in the tabular list?

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

Q20.3

Q20.3 — Discordant ventriculoarterial connection

Billable / specific codeICD-10-CMPOA exempt

Q20.3 is a billable, specific ICD-10-CM code for discordant ventriculoarterial connection. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Dextrotransposition of aorta
Transposition of great vessels (complete)

Risk adjustment

Q20.3 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

Q20.3 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 Q20.3 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 Q20.3.

Dextraposition, aorta
Dextrotransposition, aorta
Discordant connection›ventriculoarterial
Transposition›aorta(dextra)
Transposition›great vessels(complete) (partial)
Transposition›vessels, great(complete) (partial)

Related codes at this level

Codes that share Q20. If Q20.3 is not quite right, the correct code is usually one of these.

Questions about Q20.3

Is Q20.3 a billable ICD-10-CM code?: Yes. Q20.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q20.3 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).