CMS shells out millions in improper ambulance transport payments.
D000552:Ambulances / Q000191:economics*; D014487:Centers for Medicare and Medicaid Services, U.S. / Q000458:organization & administration*; D005375:Financial Audit; D006801:Humans; D012051:Reimbursement Mechanisms; D014187:Transportation of Patients / Q000191:economics*; D014481:United States