ICD-10 Code J70.3 – Chronic drug-induced interstitial lung disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J70.3 – Chronic drug-induced interstitial lung disorders
What it is
Use this code for chronic interstitial lung disease caused by a medication or chemical exposure. It identifies a long-term lung injury pattern linked to a drug, not a primary lung disorder.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe persistent cough, shortness of breath, and imaging or clinical findings consistent with interstitial lung disease after drug exposure.
When to use this code
Assign J70.3 when the provider documents chronic interstitial lung disease due to a drug or other chemical agent. Use it when the causal agent and chronic lung involvement are clearly linked in the record.
Do not rely on suspicion alone; the chart should support a drug-induced etiology. If the documentation only states pneumonitis, fibrosis, or pulmonary reaction without chronic interstitial involvement, Check documentation.
Do not use for
Do not use this code for acute drug-induced lung reactions, nonspecific pulmonary symptoms, or interstitial lung disease with no documented drug cause. Check documentation for the exact diagnosis.
Coding tip
Code the chronic drug-induced lung disorder only when the provider links the condition to the offending agent in the medical record.