“…To address this, the CMS (Centers for Medicare and Medicaid Services) Hospital Price Transparency final rule has required hospitals to post standard pricing and negotiated rates for 300 common services since 2021. While the authors note that CMS reports that over two-thirds of hospitals comply with the rule, 1 this overestimates cooperation with it. Multiple analyses have demonstrated compliance rates ranging from 6% in the first year 2 to 19% in the second year.…”