Enrollment in the TEFRA risk program: InterStudy's data differ markedly from HCFA's.
D014487:Centers for Medicare and Medicaid Services, U.S.; D003625:Data Collection / Q000379:methods; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D006302:Health Services Research / Q000592:standards*; D006801:Humans; D007357:Insurance, Physician Services / Q000706:statistics & numerical data*; D006278:Medicare / Q000706:statistics & numerical data*; D012107:Research Design; D012307:Risk Factors; D013659:Tax Equity and Fiscal Responsibility Act; D013660:Taxes; D014481:United States