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PURPOSE:   With an increase in biomarker-directed therapies, tissue biopsy to identify targetable genomic and immunologic alterations has become the mainstay of managing patients with non–small-cell lung cancer (NSCLC); however, little is known about the associated economic impact and complication rate. This study assesses the frequency, complications, and costs of diagnostic and postprogression biopsy.METHODS:   This retrospective, observational study was conducted using administrative claims data from more than 30 million commercially insured individuals in the United States (2006 to 2014). Data were analyzed for the overall population and by time of biopsy (diagnostic or postprogression biopsy).RESULTS:   Of 20,013 eligible patients, 13,411 (67%) received a diagnostic biopsy, whereas only 2,056 (10%) received a postprogression biopsy (mean cost, $9,977 and $16,806, respectively). Complication rates were similar at diagnosis and after progression, on the day of biopsy (10% v 7%, respectively) and within 30 days (63% v 61%, respectively). Mean costs were higher among patients with a complication compared with those without a complication on the day of biopsy (diagnostic biopsy, $12,030 v $6,508, respectively; postprogression biopsy, $22,593 v $7,812, respectively), within 7 days of biopsy (diagnostic biopsy, $13,657 v $7,765, respectively; postprogression biopsy, $23,969 v $8,932, respectively), and within 30 days of biopsy (diagnostic biopsy, $24,968 v $15,988, respectively; postprogression biopsy, $30,293 v $12,494, respectively; P &lt; .001 for all comparisons).CONCLUSION:   From 2006 to 2014, postprogression biopsies were not common practice in NSCLC. Complication rates were similar at diagnosis and after progression, with mean costs higher among patients with a complication than those without a complication. With increasing demands for effective novel targeted therapies and safe testing methods, these data may be valuable in determining the budget impact and comparing complication rates with newer, less invasive molecular testing methods, including plasma circulating tumor DNA testing.

journal of oncology practice

Complications and Economic Burden Associated With Obtaining Tissue for Diagnosis and Molecular Analysis in Patients With Non–Small-Cell Lung Cancer in the United States