ICD-10 Code J84.8 – Other specified interstitial pulmonary diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J84.8 – Other specified interstitial pulmonary diseases
What it is
J84.8 identifies interstitial lung disease that does not fit a more specific ICD-10-CM category. Use it for documented pulmonary interstitial disorders when the provider names a distinct condition not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Common findings in interstitial lung disease include chronic cough, shortness of breath, and imaging evidence of diffuse interstitial involvement.
When to use this code
Use J84.8 when the record clearly documents an interstitial pulmonary disease that is specified, but no more precise code is available. It may apply when the diagnosis is confirmed by the provider and the condition is not indexed elsewhere.
Choose this code only after reviewing the chart for a more specific interstitial lung disorder. If the documentation is vague or incomplete, check documentation before assigning J84.8.
Do not use for
Do not use this code for interstitial lung diseases with a specific ICD-10-CM code, such as those separately indexed in the classification. Do not use it when the diagnosis is uncertain or only suspected.
Coding tip
Code J84.8 only when the provider’s wording supports a specific “other specified” interstitial lung diagnosis and no better code is documented.