title: By the numbers. A majority of unsubsidized seniors with prescription drug coverage are enrolled in HMOs.
authors.forename: W P
authors.initials: WP
authors.lastname: Welch
mesh_terms: D000368:Aged; D003625:Data Collection; D005260:Female; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D006801:Humans; D019458:Insurance Coverage / Q000706:statistics & numerical data; D007356:Insurance, Pharmaceutical Services / Q000706:statistics & numerical data*; D008297:Male; D020398:Medicare Part C; D014481:United States