ICD-10-CM 2027
ICD-10 code for chemical chronic bronchiolitis
From the official ICD-10-CM alphabetic index entry “Bronchiolitis (acute) (infective) (subacute) › chemical (chronic)”. Page updated September 29, 2026.
About coding chemical chronic bronchiolitis
The ICD-10-CM code for chemical chronic bronchiolitis is J68.4 (Chronic respiratory conditions due to chemicals, gases, fumes and vapors). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on J68.4.
Within J68 (respiratory conditions due to inhalation of chemicals, gases, fumes and vapors), J68.4 is specifically for chronic respiratory conditions due to chemicals, gases, fumes and vapors. Related codes cover bronchitis and pneumonitis due to chemicals, gases, fumes and vapors (J68.0), pulmonary edema due to chemicals, gases, fumes and vapors (J68.1), upper respiratory inflammation due to chemicals, gases, fumes and vapors, not elsewhere classified (J68.2), other acute and subacute respiratory conditions due to chemicals, gases, fumes and vapors (J68.3), other respiratory conditions due to chemicals, gases, fumes and vapors (J68.8) and unspecified respiratory condition due to chemicals, gases, fumes and vapors (J68.9).
Don't report J68.4 together with the conditions in its Excludes1 note: chronic pulmonary edema due to chemicals, gases, fumes and vapors (J68.1).
More specific chemical chronic bronchiolitis codes (official index)
- acute J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
Don't confuse with (Excludes1 for J68.4)
- chronic pulmonary edema due to chemicals, gases, fumes and vapors (J68.1)
Common questions about chemical chronic bronchiolitis ICD-10 codes
What is the ICD-10 code for chemical chronic bronchiolitis?
- J68.4 — Chronic respiratory conditions due to chemicals, gases, fumes and vapors. More specific codes apply when the documentation supports them: J68.0.
What is the ICD-10 code for acute chemical chronic bronchiolitis?
- J68.0 — Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors.
Is J68.4 billable?
- Yes. J68.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J68.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J68.4 as a principal diagnosis.
Is J68.4 a CC or MCC?
- No. J68.4 is neither a CC nor an MCC under MS-DRG v44.0.