J40 – Bronchitis, not specified as acute or chronic

ICD-10-CM 2027 diagnosis code · Chronic lower respiratory diseases

Billable code

ICD-10-CM code J40
Code
J40 (claims format: J40)
Description
Bronchitis, not specified as acute or chronic
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
10. Diseases of the respiratory system (J00-J99)
Block
J40-J4B Chronic lower respiratory diseases

Notes for J40

Applicable to:
  • Bronchitis NOS
  • Bronchitis with tracheitis NOS
  • Catarrhal bronchitis
  • Tracheobronchitis NOS
Excludes1 (not coded here):
  • 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)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block J40-J4B

Excludes1 (not coded here):
  • bronchitis due to chemicals, gases, fumes and vapors (J68.0)
Excludes2 (not included here):
  • cystic fibrosis (E84.-)

Index terms for J40

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code J40?

J40 is the ICD-10-CM code for bronchitis, not specified as acute or chronic, in the block J40-J4B (Chronic lower respiratory diseases).

Is J40 a billable code?

Yes. J40 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.