ICD-10 Code J42 - Unspecified chronic bronchitis

ICD-10-CM Diagnosis Code J42

Diagnosis Code: J42 (Raw: J42)

Description: Unspecified chronic bronchitis

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code J42 is designated for Unspecified chronic bronchitis. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.