Government audits uncovered about $12 million in net overpayments for the care of 18,090 patients sampled, though the actual losses to taxpayers are likely much higher.
UnitedHealth, which has been expanding in Oregon, is under scrutiny over issues that include its data practices.
American Medical Response said its pullout from two counties in California will primarily affect Providence, the Catholic health system.
A new report reflects how loosely the federal government regulates the way hospitals calculate their community benefits.
Hearing aid prices are dropping dramatically as a federal law takes effect.
Independent physicians in the United States are selling their practices to behemoth hospital systems or leaving the profession altogether.
SEIU-represented workers at PeaceHealth say high turnover, low pay affect patient care.