Des Moines Register: More than 425,000 poor or disabled Iowans will soon have to switch health insurance carriers. UnitedHealthcare, which manages health care for more than two-thirds of Iowans on Medicaid, is leaving the market, Gov. Kim Reynolds’ office announced late Friday afternoon. The departure, to come in the next few months, came after Iowa officials broke off contract negotiations due to what Reynolds termed “unreasonable and unsustainable” demands from UnitedHealthcare.