ICD-10 Code J84.84 – Other interstitial lung diseases of childhood (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J84.84 – Other interstitial lung diseases of childhood
What it is
This code identifies interstitial lung disease in children that does not fit a more specific diagnosis. It covers chronic diffuse lung disorders affecting the lung interstitium, based on the clinician’s documentation.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include persistent cough, shortness of breath, exercise intolerance, and imaging or specialist assessment consistent with interstitial lung disease.
When to use this code
Use J84.84 when the provider documents other interstitial lung disease of childhood and no more specific ICD-10-CM code applies. It is appropriate when the record confirms a pediatric interstitial process but does not name a distinct subtype. Check documentation if the diagnosis is uncertain or still under evaluation.
Do not use for
Do not use this code for interstitial lung disease with a more specific documented diagnosis. Avoid it when the condition is an acute infection, asthma, or another non-interstitial respiratory disorder.
Coding tip
Code the most specific documented pediatric lung diagnosis first; use J84.84 only when the record supports a nonspecific “other” interstitial lung disease.