No Apparent Workup for most new Indeterminate Pulmonary Nodules in US Commercially-Insured Patients.

Background: A recent study estimated that more than 1.5 million Americans have an indeterminate pulmonary nodule (IPN) identified on a chest computed tomography (CT) scan each year outside of lung cancer screening programs. However, the cost and pattern of subsequent IPN workup have not been described for real-world settings.