Third party contracting and buying groups across the United States.
D007348:Insurance, Health / Q000639:trends*; D007349:Insurance, Health, Reimbursement / Q000639:trends*; D007356:Insurance, Pharmaceutical Services / Q000639:trends*; D010593:Pharmaceutical Services / Q000639:trends*; D011243:Preferred Provider Organizations / Q000639:trends*; D014481:United States