Drug-induced interstitial lung disorders, unspecified

This code signifies a diffuse lung disease characterized by inflammation and fibrosis of the lung interstitium, which is caused by an adverse reaction to a medication. The specific type of interstitial lung disorder is not identified in the medical record.

Use this code when documentation clearly links an interstitial lung disorder to a drug, but the specific pathological pattern (e.g., organizing pneumonia, hypersensitivity pneumonitis) is not specified. This code is appropriate when the physician explicitly states "drug-induced interstitial lung disease, unspecified."

• Ensure the medical record explicitly states the drug as the causative agent for the interstitial lung disorder.
• Avoid using this code if a more specific drug-induced interstitial lung disorder is documented (e.g., drug-induced hypersensitivity pneumonitis).
• Remember the Excludes1 notes; do not code this with J84.9 (interstitial pneumonia NOS) or J84.2 (lymphoid interstitial pneumonia).