J40
✓ Billable
Bronchitis, not specified as acute or chronic
ICD-10-CM · FY2026 · Diseases of the Respiratory System
Code
J40
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Respiratory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Also known as
- Bronchitis NOS
- Bronchitis with tracheitis NOS
- Catarrhal bronchitis
- Tracheobronchitis NOS
Excludes1 — never code together
- acute bronchitis (J20.-)
- allergic bronchitis NOS (J45.909)
- asthmatic bronchitis NOS (J45.9-)
- bronchitis due to chemicals, gases, fumes and vapors (J68.0)
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 J40?
ICD-10-CM code J40 represents Bronchitis, not specified as acute or chronic. It is a billable diagnosis code in the Diseases of the Respiratory System chapter, effective October 1, 2025 – September 30, 2026.
Is J40 billable?
Yes. J40 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is J40 in?
J40 belongs to the Diseases of the Respiratory System chapter (J00–J99) of ICD-10-CM.
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