J70.2

Billable

Acute drug-induced interstitial lung disorders

HCC Category Mapping

V24HCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders

0.268

ESRDHCC 112 — Fibrosis of Lung and Other Chronic Lung Disorders

0.000

What This Code Means

This condition occurs when certain medications cause sudden inflammation and scarring in the lung tissue, making it difficult to breathe. It develops quickly after taking the offending drug and can improve if the medication is stopped.

Coding Tips

•Always identify and code the specific drug causing the reaction using the appropriate T36-T50 poisoning code as a secondary diagnosis
•Ensure the onset is documented as acute (sudden) rather than chronic to distinguish from J70.3; review clinical notes for timing between drug initiation and symptom development

Clinical Significance

Acute drug-induced interstitial lung disease is an important iatrogenic condition where medications cause sudden lung inflammation and potential fibrosis. It is significant for risk adjustment in V24 because it captures a serious adverse drug reaction requiring urgent medical management including drug discontinuation, supportive care, and monitoring for disease progression.

Documentation Requirements

✓Identification of the specific causative drug (amiodarone, methotrexate, bleomycin, nitrofurantoin, etc.)
✓Temporal relationship between drug initiation/dose change and symptom onset
✓Chest imaging showing interstitial changes (ground-glass opacities, consolidation)
✓Pulmonary function tests if available
✓Drug reaction adverse effect coding using T36-T50 codes
✓Clinical response to drug discontinuation
✓Documentation specifying acute onset (not chronic)

Excludes 1 — Do NOT code together

interstitial pneumonia NOS (J84.9)
lymphoid interstitial pneumonia (J84.2)

Use Additional Code

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Commonly Confused Codes

J70.3 (Chronic drug-induced interstitial lung disorders) — chronic vs. acute; different treatment timelines J70.4 (Drug-induced interstitial lung disorders, unspecified) — use J70.2 when acute onset is documented J84.10 (Pulmonary fibrosis, unspecified) — use J70.2/J70.3 when a drug etiology is established J82.81 (Chronic eosinophilic pneumonia) — some drug reactions cause eosinophilic patterns

Code Hierarchy

└J70Respiratory conditions due to other external agents └J70.2Acute drug-induced interstitial lung disorders

└J70.2Acute drug-induced interstitial lung disorders