ICD-10 Code J84.17 – Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J84.17 – Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere
What it is
This code identifies fibrotic interstitial lung disease that is attributed to another underlying condition. Use it when the record shows lung scarring and the cause is documented elsewhere in the chart.
Clinical signs
Common findings include progressive shortness of breath, dry cough, crackles, and imaging evidence of interstitial fibrosis. Clinical features vary; refer to documentation.
When to use this code
Use J84.17 when the clinician documents interstitial pulmonary fibrosis secondary to a known disease, exposure, or other classified condition. The underlying cause should be documented, and you may need an additional code for that condition. Do not assign it for unspecified pulmonary fibrosis without an attributed cause.
Do not use for
Do not use this code for idiopathic pulmonary fibrosis or other primary fibrotic lung diseases. Check documentation if the fibrosis is not clearly linked to another condition.
Coding tip
Confirm the causal condition in the note before coding, and sequence the underlying disease when required.