UnitedHealth Group Inc. will pay $350 million to resolve class action lawsuits over reimbursement for its out-of-network medical services. UnitedHealth hailed the proposed class-action settlement as resolving numerous lawsuits around the country by patients and doctors claiming that the out-of-network payments were too low for many years. The settlement comes two days after UnitedHealth struck an agreement with the New York state attorney general following a probe into the independence of its database used to set reimbursement rates for patients’ medical bills.