J42 ICD-10-CA code: Unspecified chronic bronchitis
J42 is the ICD-10-CA code for “Unspecified chronic bronchitis” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
J42Unspecified chronic bronchitis
ICD-10-CA · Canada
Index terms
Entries in CIHI’s alphabetical index that lead to J42. Searching the index by the condition the note names is how coders reach this code.
- Laryngotracheobronchitis, chronic
- Pharyngotracheitis (acute), chronic
- Tracheopharyngitis (acute), chronic
- Bronchorrhea, chronic (infective) (purulent)
- Infection, infected (opportunistic), trachea, chronic
- Tracheobronchitis (15 years of age and above), chronic
- Tracheobronchitis (15 years of age and above), senile (chronic)
- Infection, infected (opportunistic), respiratory (tract) NEC, lower (acute), chronic
- Tracheitis (acute) (catarrhal) (infantile) (membranous) (plastic) (pneumococcal) (viral), chronic
- Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) (with tracheitis)(15 years of age and above), chronic
- Tracheitis (acute) (catarrhal) (infantile) (membranous) (plastic) (pneumococcal) (viral), chronic, with, bronchitis (chronic)
- Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) (with tracheitis)(15 years of age and above), senile (chronic)
- Tracheitis (acute) (catarrhal) (infantile) (membranous) (plastic) (pneumococcal) (viral), with, bronchitis (15 years of age and above), chronic
- Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) (with tracheitis)(15 years of age and above), chronic, with, tracheitis (chronic)
Notes for J42
As CIHI prints them, with any note J42 takes from the headings above it.
Includes
- Chronic:• bronchitis NOS• tracheitis• tracheobronchitis
Excludes
Conditions classified elsewhere.
- Chronic:• asthmatic bronchitis (J44.-)• bronchitis• simple and mucopurulent (J41.-)• with airways obstruction (J44.-)• emphysematous bronchitis (J44.-)• obstructive pulmonary disease NOS (J44.9)
- Cystic fibrosis (E84.-)respiratory infection NOS (J98.7)From J40-J47 Chronic lower respiratory diseases
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 10: Diseases of the respiratory system (J00-J99)
Note
- When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g., tracheobronchitis to bronchitis in J40).From Chapter 10: Diseases of the respiratory system (J00-J99)
Where J42 sits
- 1ChapterChapter 10: Diseases of the respiratory system (J00-J99)
- 2Block J40-J47Chronic lower respiratory diseases
- 3Valid code J42Unspecified chronic bronchitis
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code J42 mean?
J42 is the ICD-10-CA code for “Unspecified chronic bronchitis” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is J42 in ICD-10-CA?
J42 sits under J40-J47 Chronic lower respiratory diseases, within Chapter 10: Diseases of the respiratory system (J00-J99).
What coding notes apply to J42?
ICD-10-CA lists Includes, Excludes, Note notes for J42, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.