11073 Background: Financial burden of cancer care in the United States is substantial. Prior studies have explored price trends at the level of individual cancer drugs but not that of clinical indications, which can be impacted not only by changes in drug prices but also changes in standard-of-care. This study evaluates temporal trends in the cost of providing the contemporary best guideline-concordant therapy for each cancer indication. Methods: We analyzed trends in the cost of the standard-of-care treatments for the 20 most prevalent cancer types, using NCCN Guidelines to identify the standard-of-care (SOC) treatment for each indication. Our primary comparison of interest was the cost of providing the SOC treatment regimen for each indication in 2021 vs. 2017. All solid tumor treatment indications present in the NCCN Guidelines at both study time points, 7/1/2017 and 7/1/2021, were included. Indications that involved radiotherapy or stem cell transplant among the treatment options were excluded. Costs of all recommended treatment options for each included indication were calculated using Medicare reimbursement rates. We included costs of the antineoplastic agents themselves as well as necessary supportive medications. Costs were inflation-adjusted to 2021 USD. We identified the SOC treatment for every indication at both time points by referring to NCCN Evidence Blocks and identifying the regimen(s) with the highest scores (prioritizing Efficacy, then Safety, then Quality, then Consistency, in that order). If multiple SOC treatments for a single indication had identical scores, we chose the least-costly treatment. Results: 83 clinical indications across 16 solid tumor cancer types (bladder, brain, breast, colon, kidney, liver, lung, melanoma, oropharyngeal, ovary, pancreas, prostate, rectal, soft tissue, stomach, and uterus) were included. Median SOC cost was $8,364 (IQR = $3,838, $15,783) in 2017, compared to a median of $4,290 (IQR = $1,438, $14,947) in 2021. 57 indications (68.7%) had lower SOC costs in 2021 vs 2017, with median change of -$935 (IQR = -$4,432, +$452), representing a 31% decrease (IQR = -50%, 8%). Gastric cancer perioperative chemotherapy had the biggest absolute cost decrease at $65,612 (-90%), while extensive stage small cell lung cancer had the biggest absolute increase at $37,213 (706%). 45 indications (54.2%) had the same SOC regimen across this study period, of which 75.6% saw price drops. Of the 38 indications with new SOCs, 60.5% had lower costs. Conclusions: Majority of the best SOC treatments decreased in cost over a 4 year period. Although introduction of newly approved drugs can cause large price increases for some indications, more commonly the financial cost of delivering the standard-of-care treatment for a given cancer trended down due to slower-than-inflation price increases and new generic entrants.
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