PAYOR / EMPLOYER IAC/Security Life Ins./Insurers Admin. Corp. II IAC/Security Life Ins./Insurers Administrative IATSE Local #16 Health & Welfare Trust Fund IBA Health and Life Assurance Company IBEW Local 332 Health & Welfare Trust Fund IBEW Local 595 Health & Welfare Trust IBEW Local No. 1340 Health Fund IBEW/NECA Sound & Communications Health & Welfare Trust Idex Corporations Imagematrix Corporation Imageware, Inc. Impac Hotel Group Imperial Printing INC Independent Life Insurance Co. Indian Lumbermans Industrial Time & Systems Ink Company Inland Container Inland Mortgage Insignia Financial Group, Inc. Insurance Claims Management Systems, Inc. Insurance Claims Services Insurance Design Administrators Insurer's Administrative Corporation Insurex Insurnational Insurance Administrators, Inc. Integrated Health Services, Inc Intellution Interactive Medical Systems, Inc. Intercare Benefit Systems Intercare Benefits Systems Intercare Health Plans Intercontinental Corporation Inter-County Health Plan, Inc. Inter-County Hospitalization Plan Intermountain Administrators Intermountain Lumber Company International International Managed Care Services International Accident Facilities, Inc. International Assoc. of Bridge, Structual & Ornamental International Benefit Services Corporation International Group Services International Group Services International Group Services International Language Engineering International Life Investors Insurance, Co. International Medical group International Medical Group, Inc. International Rectifier Internet Communications Corp. Interplan INTERPLAN CORPORATION PPO & WC (Cont’d): INTERPLAN CORPORATION PPO & WC (Cont’d): Interstate Highway Construction Interwest Group IntirionInventory Auditors, Inc. IOA Re IOA Re IOA –RE Irwin Financial Isec Incorporated IT Corporation IT Corporation ITT Hartford Life Ins. Co. IXL Manufacturing Company

NETWORK Up & Up(Health Payors Organizations, Ltd., PPO) Interplan Corporation PPO & WC National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) Galaxy PPO National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) Galaxy PPO Galaxy PPO Galaxy PPO National Preferred Provider Network (NPPN) Interplan Corporation PPO & WC National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) First Health PPO, POS & WC Up & Up(Health Payors Organizations, Ltd., PPO) National Provider Network National Preferred Provider Network (NPPN) Bce Emergis PPO (Formerly Bps Healthcare) Galaxy PPO Preferred Health Network PPO National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) Beech Street Of California Admar Corporation First Health PPO, POS & WC Beech Street Of California Beech Street Of California Health Payors Organization, Ltd., PPO Health Payors Organization, Ltd., PPO Admar Corporation National Preferred Provider Network (NPPN) Preferred Health Network PPO Galaxy PPO Health Payors Organization, Ltd., PPO Up & Up(Health Payors Organizations, Ltd., PPO) Galaxy PPO Beech Street Of California Bce Emergis PPO (Formerly Bps Healthcare) National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) Health Payors Organization, Ltd., PPO Galaxy PPO First Health PPO, POS & WC Galaxy PPO National Preferred Provider Network (NPPN) Pacific Health Alliance PPO & EPO Interplan Corporation PPO & WC Interplan Corporation PPO & WC National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) Health Payors Organization, Ltd., PPO Pacific Health Alliance PPO & EPO Galaxy PPO National Preferred Provider Network (NPPN) National Preferred Provider Network (NPPN) First Health PPO, POS & WC First Health PPO, POS & WC Up & Up(Health Payors Organizations, Ltd., PPO) National Preferred Provider Network (NPPN) Beech Street Of California MCS Patient Centered Health Care Network PPO National Preferred Provider Network (NPPN) Admar Corporation National Preferred Provider Network (NPPN) Beech Street Of California