Q20.1 (Double outlet right ventricle) compared with Q20.2 (Double outlet left ventricle), from the official CMS tabular data. Q20.1 and Q20.2 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. Q20.1 and Q20.2 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| Q20.1Double outlet right ventricle | Q20.2Double outlet left ventricle | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Double outlet right ventricle is a billable ICD-10-CM diagnosis code (Q20.1). | Double outlet left ventricle is a billable ICD-10-CM diagnosis code (Q20.2). |
| Includes | Taussig-Bing syndrome | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources