All ICD10 Codes

J40-J4A

Non-Billable
ChapterJ00–J99
Rankblock
Official Description

Chronic lower respiratory diseases (J40-J4A)

Use a more specific code (2 billable, 6 non-billable)
J40Bronchitis, not specified as acute or chronicJ41Simple and mucopurulent chronic bronchitishas subcodesJ42Unspecified chronic bronchitisJ43Emphysemahas subcodesJ44Other chronic obstructive pulmonary diseasehas subcodesJ45Asthmahas subcodesJ47Bronchiectasishas subcodesJ4AChronic lung allograft dysfunctionhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 10: Diseases of the Respiratory System (J00-J99).

CH10 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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. Use a different code.)
  • bronchitis due to chemicals, gases, fumes and vapors (J68.0)
Excludes2(Not included here. Code separately if applicable.)
  • cystic fibrosis (E84.-)

Clinical Hierarchy

BillableHas subcodes
CH10Diseases of the respiratory system (J00-J99)
J40-J4AChronic lower respiratory diseases (J40-J4A)Not billable
J40Bronchitis, not specified as acute or chronicBillable
J41Simple and mucopurulent chronic bronchitisSubcodes
J42Unspecified chronic bronchitisBillable
J43EmphysemaSubcodes
J44Other chronic obstructive pulmonary diseaseSubcodes
J45AsthmaSubcodes
J47BronchiectasisSubcodes
J4AChronic lung allograft dysfunctionSubcodes

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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