ICD-10 Code J68.4 – Chronic respiratory conditions due to chemicals, gases, fumes and vapors (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J68.4 – Chronic respiratory conditions due to chemicals, gases, fumes and vapors
What it is
This code identifies chronic lung or airway problems caused by long-term exposure to irritating chemicals, gases, fumes, or vapors. Use it when the documentation links the respiratory condition to an inhaled occupational or environmental exposure.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include persistent cough, shortness of breath, wheezing, or chronic airway irritation after repeated exposure to an offending substance.
When to use this code
Use J68.4 when the provider documents a chronic respiratory condition due to inhalation of chemicals, gases, fumes, or vapors. It fits cases where the exposure is the stated cause and the condition is ongoing rather than acute. Check documentation for the specific agent and respiratory diagnosis.
Do not use for
Do not use this code for acute inhalation injuries, poisoning, or unspecified respiratory symptoms without a documented chronic exposure-related cause. If the record does not clearly connect the condition to the inhaled substance, check documentation.
Coding tip
Code the chronic respiratory diagnosis only when the chart explicitly ties it to chemical, gas, fume, or vapor exposure.