AETNA Health, Inc. 
Anthem Blue Cross Blue Shield
Banner Health Plan 
Beech Street
Choice Care Network (Aka Humana) 
CIGNA
Colorado Access 
Colorado Child Health Plan
Corvel Corporation 
Evercare
(United Health Is The Parent Company)
First Health Network (Coventry Health Care/First Health Network) 
GEHA (GEHA/PPO USA Network)
Great-West Healthcare 
HMO Colorado, Inc.
HMS Colorado 
Hospice Of Larimer County
Humana Insurance Company 
Mountain Medical Affiliates (Mma Network Retired 12/31/06 – Transitioned To Sloans Lake Group Health)
Multiplan 
Mutual Of Omaha
PacifiCare Behavioral Health, Inc. 
PacifiCare Health Plan Administrators
PacifiCare Hmo Msma Risk 
Physicians Health Partners
Pinnacol Assurance 
Poudre Valley Health System
(United Physicians Of Northern Colorado/United Medical Alliance)
Private Healthcare Systems 
Railroad Medicare
Rocky Mountain Health Plan 
Secure Horizons/Msma Risk
Sloan's Lake Management Corp. 
The Colorado Network
Tricare 
United Behavioral Health, Inc.
United Healthcare 
United Medical Alliance
United Payors & United Providers
(See Multiplan) 
Woodward Governor Company