Verification And Preauthorization

Certain procedures require preauthorization. For more information please click here preauthorization section.

Preferred Provider In The U.S. Or Canada

Click here for PPO Network Information.

Please note that when using this additional search tool, you may encounter duplicate listings of some providers. This occurs because physicians may be listed under more than one medical group or ID number. In the event you are still unable to locate a Provider, please contact CMN within North America at 1-866-914-5333 or call collect at 1-905-669-4920 or email to gbgassist@gbg.com.

To Locate A Network Provider By Phone Or For Emergency Medical Assistance (24 Hours) Call

Outside USA or Canada (call collect) 1-905-669-4920
Within USA or Canada (toll free) 1-866-914-5333

For any additional questions or comments please send email to claims@gbg.com.