J42Billable
Unspecified chronic bronchitis
- Chapter
- 10. Diseases of the respiratory system
- Category
- J42
- Effective date
- October 1, 2026
Frequently asked questions
What is ICD-10 code J42?
J42 is an ICD-10-CM diagnosis code for Unspecified chronic bronchitis.
Is J42 a billable code?
Yes. J42 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is J42 in?
J42 falls under Chapter 10: Diseases of the respiratory system.
When did J42 become effective?
J42 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.