ICD-10 Code J84.10 – Pulmonary fibrosis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J84.10 – Pulmonary fibrosis, unspecified
What it is
J84.10 identifies pulmonary fibrosis when the record does not specify the cause or type. Use it for documented fibrotic lung disease involving scarring of the lung tissue.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include progressive shortness of breath, dry cough, and imaging or exam evidence consistent with interstitial lung scarring.
When to use this code
Use this code when the provider documents pulmonary fibrosis but does not name a more specific interstitial lung disease or cause. It also fits cases where the chart says “fibrosis of lung” without further detail. If the etiology is stated, code the more specific diagnosis when available.
Do not use for
Do not use J84.10 when the documentation identifies a specific fibrotic disorder, such as idiopathic pulmonary fibrosis or postinflammatory fibrosis. Check documentation if the record links fibrosis to another defined condition.
Coding tip
Query for the exact type or cause of fibrosis before defaulting to unspecified.