Q20.5

Billable

ChapterQ00–Q99

Ranksubcategory

Official Description

Discordant atrioventricular connection

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

Instructional Notes

Includes

Corrected transposition
Levotransposition
Ventricular inversion

General instructions are available for the parent sections:

View CH17 Notes View Q20 Notes

Clinical Hierarchy

CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Q20-Q28Congenital malformations of the circulatory system (Q20-Q28)

Q20Congenital malformations of cardiac chambers and connections

Q20.5Discordant atrioventricular connection

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q20.5:

categoryQ20

Congenital malformations of cardiac chambers and connections

View context instructions

chapterCH17

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Q20.5. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

7 raw paths

Communication1 unique routes

between

left ventricle and right atrium→Q20.5

Corrected transposition1 unique routes

Direct index entry→Q20.5

Discordant connection1 unique routes

atrioventricular (congenital)→Q20.5

Inversion1 unique routes

ventricular→Q20.5

Levotransposition1 unique routes

Direct index entry→Q20.5