By the numbers. Financially vulnerable beneficiaries depend on Medicare HMOs.
Welch
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D000368:Aged; D003625:Data Collection; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D006801:Humans; D020398:Medicare Part C / Q000706:statistics & numerical data*; D011203:Poverty / Q000706:statistics & numerical data*; D014481:United States