J42

Billable

Unspecified chronic bronchitis

J42 is the ICD-10-CM code for Unspecified chronic bronchitis. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
J00-J99
Edition
FY2026

J00-J99 Diseases of the respiratory system

Includes

  • Chronic bronchitis NOS
  • Chronic tracheitis
  • Chronic tracheobronchitis

Excludes1 — not coded here

  • bronchiolitis obliterans and bronchiolitis obliterans syndrome (J44.81)
  • chronic asthmatic bronchitis (J44.-)
  • chronic bronchitis with airways obstruction (J44.-)
  • chronic emphysematous bronchitis (J44.-)
  • chronic obstructive pulmonary disease NOS (J44.9)
  • simple and mucopurulent chronic bronchitis (J41.-)

Use additional code

  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Frequently asked questions

What is ICD-10 code J42?
J42 is the ICD-10-CM code for "Unspecified chronic bronchitis". It falls under J00-J99 Diseases of the respiratory system.
Is J42 a billable code?
Yes — J42 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from J42?
Excludes1 (not coded here): bronchiolitis obliterans and bronchiolitis obliterans syndrome (J44.81); chronic asthmatic bronchitis (J44.-); chronic bronchitis with airways obstruction (J44.-); chronic emphysematous bronchitis (J44.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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