Q20.5 — Discordant atrioventricular connection
Q20.5 is a billable, specific ICD-10-CM code for discordant atrioventricular connection. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Corrected transposition
- Levotransposition
- Ventricular inversion
Risk adjustment
Q20.5 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
Q20.5 is named in 28 Medicare coverage policies — 28 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52458Automatic External Defibrillators - Policy Article
- A52458Automatic External Defibrillators - Policy Article
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
How Q20.5 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 Q20.5.
- Corrected transposition
- Levotransposition
- Discordant connection›atrioventricular(congenital)
- Inversion›ventricular
- Transposition›corrected
- Ventricle, ventricular›inversion
- Communication›between›left ventricle and right atrium
Related codes at this level
Codes that share Q20. If Q20.5 is not quite right, the correct code is usually one of these.
- Q20.0Common arterial trunk
- Q20.1Double outlet right ventricle
- Q20.2Double outlet left ventricle
- Q20.3Discordant ventriculoarterial connection
- Q20.4Double inlet ventricle
- Q20.6Isomerism of atrial appendages
- Q20.8Other congenital malformations of cardiac chambers and connections
- Q20.9Congenital malformation of cardiac chambers and connections, unspecified
Questions about Q20.5
- Is Q20.5 a billable ICD-10-CM code?
- Yes. Q20.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q20.5 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).