HMOs remain a riskier proposition than PPOs.
D003625:Data Collection; D006279:Health Maintenance Organizations / Q000191:economics* / Q000706:statistics & numerical data; D007349:Insurance, Health, Reimbursement / Q000706:statistics & numerical data*; D011243:Preferred Provider Organizations / Q000191:economics* / Q000706:statistics & numerical data; D012306:Risk; D014481:United States