I have an appointment with an Orthopedic doctor and all I can find is that is accepts all networks. I do not find BCBS Health Select on the list. How can I know if he will accept my insurance. I am a retiree.

I have an appointment with an Orthopedic doctor and all I can find is that he accepts all networks.  I do not find BCBS Health Select on the list.  How can I know if he will accept my insurance after Medicare.  I am a retiree.