AIM Specialty Health®* (AIM) created new contact center phone numbers for Medicare providers to call for prior authorization requests. The new phone numbers are listed below.


Note: The old number is not available for requests after August 15, 2022, so please use this new number to submit new prior authorization AIM requests.

Health plan


New number

Anthem Blue Cross




As always, the best way to reach AIM is to use the ProviderPortalSM. It is:

  • Self-service.
  • Available 24/7.
  • Customizable with physician information.
  • Easy to use and allows real-time determinations.


The ProviderPortal is a fast and efficient way to start a case. It also allows your team to:

  • Check order status and view order history. 
  • Print/save PDF of order summary. 
  • Use multiple staff members to enter/view the practice’s orders. 
  • Increase payment certainty.
  • Reference desk training and tutorials, including clinical criteria and CPT® lists.


If not already registered, your first step is to register your practice in the ProviderPortal at



Featured In:
September 2022 Anthem Blue Cross Provider News - California