Predict the future with claims data plus pharmacy information.
The technology and know-how are out there to give adminstrators a reasonable guess at future clinical costs for a given population. All you have to do is ask.
D003625:Data Collection; D016527:Drug Costs / Q000639:trends*; D005544:Forecasting; D007345:Insurance Claim Review; D008329:Managed Care Programs / Q000191:economics / Q000639:trends; D017146:Models, Organizational; D010593:Pharmaceutical Services / Q000191:economics / Q000706:statistics & numerical data*; D012044:Regression Analysis; D014481:United States