title: Prior authorization. Policy statement.
mesh_terms: D004632:Emergency Medical Services / Q000191:economics / Q000592:standards; D006291:Health Policy; D006801:Humans; D007348:Insurance, Health; D007349:Insurance, Health, Reimbursement; D017057:Medically Uninsured; D028701:Patient Rights / Q000592:standards; D014481:United States