Health Affairs' Rob Lott interviews Dan Arnold of Brown University to discuss his recent paper exploring higher payments within UnitedHealth’s Optum network, which found UHC Paid Optum providers more than non-Optum Providers using price transparency data. Order the November 2025 issue of Health Affairs.Currently, more than 70 percent of our content is freely available - and we'd like to keep it that way. With your support, we can continue to keep our digital publication Forefront and podcast