J42: Unspecified chronic bronchitis

J42 is a billable/specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Unspecified chronic bronchitis.

Inclusion term

Chronic bronchitis NOS
Chronic tracheitis
Chronic tracheobronchitis

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)

Type 1 excludes

Bronchiolitis obliterans and bronchiolitis obliterans syndrome (J44.81)
Chronic asthmatic bronchitis (J44.-)
Chronic bronchitis with airways obstruction (J44.-)
Chronic emphysematous bronchitis (J44.-)
Chronic obstructive pulmonary disease NOS (J44.9)
Simple and mucopurulent chronic bronchitis (J41.-)

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Versions

2026
No changes
2025
No changes
2024
Code changed
- Type 1 excludes
  ~~chronic asthmatic bronchitis (J44.-)~~
  ~~chronic bronchitis with airways obstruction (J44.-)~~
  ~~chronic emphysematous bronchitis (J44.-)~~
  ~~chronic obstructive pulmonary disease NOS (J44.9)~~
  ~~simple and mucopurulent chronic bronchitis (J41.-)~~
  bronchiolitis obliterans and bronchiolitis obliterans syndrome (J44.81)
  chronic asthmatic bronchitis (J44.-)
  chronic bronchitis with airways obstruction (J44.-)
  chronic emphysematous bronchitis (J44.-)
  chronic obstructive pulmonary disease NOS (J44.9)
  simple and mucopurulent chronic bronchitis (J41.-)
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
Code changed
- 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 use (Z87.891)~~
  ~~occupational exposure to environmental tobacco smoke (Z57.31)~~
  ~~tobacco dependence (F17.-)~~
  ~~tobacco use (Z72.0)~~
  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)
2016
New code

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Inclusion term

Use additional code

Type 1 excludes

Versions

2026

2025

2024

Type 1 excludes

2023

2022

2021

2020

2019

2018

2017

Use additional code

2016

Inclusion term

Use additional code

Type 1 excludes

Versions

2026

2025

2024

Type 1 excludes

2023

2022

2021

2020

2019

2018

2017

Use additional code

2016