Pulmonary fibrosis includes a large, heterogeneous group of many different entities. Making a differential diagnosis is challenging, and patients report delays or frustrations when receiving a diagnosis. Yet, a prompt, accurate diagnosis is needed to guide treatment decisions. This case-based activity will take clinicians through the integration of clinical, radiologic, and pathologic data when differentiating pulmonary fibrosis. Expert faculty Kevin Flaherty, MD, will use a case-based approach to take participants through the differential diagnosis of two patients under evaluation for pulmonary fibrosis. This online virtual patient platform affords clinicians an opportunity to absorb relevant clinical and evidence-based information.