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Colorado Health Insurance Provider Directories Before applying for individual or family health insurance coverage, please make sure that your physicians and local facilities are in-network.  Note: Please refer to our self-help page to review insurance network doctor directories for your employer-sponsored healthplan.  The links below pertain ONLY to individual & family plans.  Aetna Anthem Blue Cross and Blue Shield American Medical Security Celtic Note:  Celtic Insurance does not work well in the mountain towns such as Steamboat, Vail, & Summit County due to lack of network physicians. Golden Rule by UHC  (UHC Choice Plus or Sloans Lake Network) UHC Choice Plus Sloans Lake Humana Choice Care Kaiser Permanente Rocky Mountain Health Plans Time Insurance / Assurant Health World Insurance - Note: World Insurance uses the Great West Open Access Network