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ICD-10/J40

J40 ICD-10-CM Code: Bronchitis, not specified as acute or chronic

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.

  • MS-DRG 202 — BRONCHITIS AND ASTHMA WITH CC/MCC (MDC 04)
  • MS-DRG 203 — BRONCHITIS AND ASTHMA WITHOUT CC/MCC (MDC 04)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Bronchitis, not specified as acute or chronic is a billable ICD-10-CM diagnosis code (J40).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for J40 in the official ICD-10-CM tabular list.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Bronchitis NOS
  • Bronchitis with tracheitis NOS
  • Catarrhal bronchitis
  • Tracheobronchitis NOS

Excludes1 — Not Coded Here

Conditions that can never be reported with this code; the two are mutually exclusive.

  • acute bronchitis (J20.-)
  • allergic bronchitis NOS (J45.909)
  • asthmatic bronchitis NOS (J45.9-)
  • bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

  • cystic fibrosis (E84.-)

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional 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)

Indexed Clinical Terms (4)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous)
  • Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous), catarrhal (l5 years of age and above)
  • Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous), with, tracheitis (l5 years of age and above)
  • Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral), with, bronchitis (15 years of age and above)