J40-J4A

Non-Billable
ChapterJ00–J99
Rankblock
Official Description

Chronic lower respiratory diseases (J40-J4A)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 10: Diseases of the Respiratory System (J00-J99).

CH10 Parent Instructions

Excludes2(Not included here)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • smoke inhalation (T59.81-)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
  • code, where applicable, 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)

Instructional Notes

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

Clinical Hierarchy

CH10Diseases of the respiratory system (J00-J99)
J40-J4AChronic lower respiratory diseases (J40-J4A)
J40Bronchitis, not specified as acute or chronic
J41Simple and mucopurulent chronic bronchitis
J42Unspecified chronic bronchitis
J43Emphysema
J44Other chronic obstructive pulmonary disease
J45Asthma
J47Bronchiectasis
J4AChronic lung allograft dysfunction

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to J40-J4A:

chapterCH10
Diseases of the respiratory system (J00-J99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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