ICD-9 Code 746.86 - Congenital heart block

ICD-9-CM Diagnosis Code 746.86

Diagnosis Code: 746.86 (Raw: 74686)

Description: Congenital heart block

Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)

Fiscal Year: 2026 Reference

CMS Section 111 Status: Valid for reporting.

Overview & Historical Usage

ICD-9-CM code 746.86 is designated for Congenital heart block. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.