By the numbers. Insurers/managed care.
D054598:Blue Cross Blue Shield Insurance Plans / Q000706:statistics & numerical data; D003625:Data Collection; D005249:Fees and Charges / Q000706:statistics & numerical data / Q000639:trends; D019981:Health Care Sector / Q000706:statistics & numerical data* / Q000639:trends; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data; D008329:Managed Care Programs / Q000145:classification / Q000191:economics / Q000706:statistics & numerical data*; D011243:Preferred Provider Organizations / Q000706:statistics & numerical data; D014481:United States