UnitedHealth Group shareholders proposed a resolution requesting a report on the costs and public health impact of practices that delay or limit healthcare access. The proposal focuses on prior authorization and denials of medical services, which critics say lead patients to forgo necessary care. The request comes amid heightened scrutiny of U.S. health insurers following the December killing of UnitedHealthcare CEO Brian Thompson. UnitedHealth operates UnitedHealthcare, the largest U.S. health insurer, along with Optum and medical practices.