An update on second surgical opinion programs.
D054598:Blue Cross Blue Shield Insurance Plans / Q000191:economics; D003363:Cost Control; D008484:Medicaid / Q000191:economics; D006278:Medicare / Q000191:economics; D012017:Referral and Consultation / Q000191:economics / Q000706:statistics & numerical data*; D013514:Surgical Procedures, Operative / Q000191:economics / Q000706:statistics & numerical data*; D014481:United States; D014483:United States Dept. of Health and Human Services