Physician reimbursement.
D054598:Blue Cross Blue Shield Insurance Plans; D005245:Fee Schedules; D005251:Fees, Medical; D049672:History, 19th Century; D049673:History, 20th Century; D007357:Insurance, Physician Services / Q000266:history*; D008484:Medicaid / Q000191:economics; D006278:Medicare / Q000191:economics; D012051:Reimbursement Mechanisms; D014481:United States