J42 Unspecified chronic bronchitis

Billable ICD-10-CM code, FY2026.

Applicable to

• Chronic bronchitis NOS
• Chronic tracheitis
• Chronic tracheobronchitis

Excludes1 (never code together)

• 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.-)

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)

Applies from J42 Unspecified chronic bronchitis

Applicable to

• Chronic bronchitis NOS
• Chronic tracheitis
• Chronic tracheobronchitis

Excludes1 (never code together)

• 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.-)

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)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders
• CMS-HCC V22: HCC 111 — Chronic Obstructive Pulmonary Disease
• RxHCC V08: HCC 229 — Chronic Obstructive Pulmonary Disease, Bronchiectasis, and Other Asthma
• ESRD V24: HCC 111

MS-DRG index

Defines the logic of DRG(s) 190-192 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 491.9 Unspecified chronic bronchitis

Code annotations containing back-references to J42

Back-references to J42

• Type 2 Excludes: J04.1 Acute tracheitis ("chronic tracheitis (J42)")
• Type 2 Excludes: J20 Acute bronchitis ("chronic bronchitis NOS (J42)")
• Type 2 Excludes: J20 Acute bronchitis ("chronic tracheobronchitis (J42)")
• Type 1 Excludes: J37.1 Chronic laryngotracheitis ("chronic tracheitis (J42)")
• Type 2 Excludes: J41 Simple and mucopurulent chronic bronchitis ("chronic bronchitis NOS (J42)")
• Type 2 Excludes: J44 Other chronic obstructive pulmonary disease ("chronic bronchitis NOS (J42)")
• Type 2 Excludes: J44 Other chronic obstructive pulmonary disease ("chronic tracheitis (J42)")
• Type 2 Excludes: J44 Other chronic obstructive pulmonary disease ("chronic tracheobronchitis (J42)")

Back-references to J42

• Type 2 Excludes: J04.1 Acute tracheitis ("chronic tracheitis (J42)")
• Type 2 Excludes: J20 Acute bronchitis ("chronic bronchitis NOS (J42)")
• Type 2 Excludes: J20 Acute bronchitis ("chronic tracheobronchitis (J42)")
• Type 1 Excludes: J37.1 Chronic laryngotracheitis ("chronic tracheitis (J42)")
• Type 2 Excludes: J41 Simple and mucopurulent chronic bronchitis ("chronic bronchitis NOS (J42)")
• Type 2 Excludes: J44 Other chronic obstructive pulmonary disease ("chronic bronchitis NOS (J42)")
• Type 2 Excludes: J44 Other chronic obstructive pulmonary disease ("chronic tracheitis (J42)")
• Type 2 Excludes: J44 Other chronic obstructive pulmonary disease ("chronic tracheobronchitis (J42)")

Diagnosis Index entries for J42

• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › with › tracheitis (l5 years of age and above) › chronic
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › chemical (acute) (subacute) › chronic
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › chemical (acute) (subacute) › due to fumes or vapors
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › chronic
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › chronic › with › tracheitis (chronic)
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › chronic › chemical (due to fumes or vapors)
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › chronic › due to › chemicals, gases, fumes or vapors (inhalation)
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › senile (chronic)
• Bronchorrhea › chronic (infective) (purulent)
• Infection, infected, infective (opportunistic) › trachea, chronic
• Pharyngotracheitis, chronic
• Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral) › with › bronchitis (15 years of age and above) › chronic
• Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral) › chronic
• Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral) › chronic › with › bronchitis (chronic)
• Tracheopharyngitis (acute) › chronic

Nearby codes

• J42 Unspecified chronic bronchitis (this code)