Wiki Medicare application questions

[SCCL5558]

I was hoping to get some clarification on what application others have filled out for Medicare. I have a Plastic Surgeon that is going to start doing on-call surgeries at a nearby hospital. He is a part of a group and none of the Physicians take insurance at the private practice. Since the one provider is going to start taking calls at the hospital, I would assume he will need to be participating with Medicare and Medi-cal in order to receive payment. Do I need to enroll the group (CMS-855B) and then also enroll the one physician (CMS 855I) just so he can be paid for the hospital charges? Will this interfere in any way with the private practice? He doesn't want to be participating with his private practice just the hospital. Hopefully this all makes sense and hopefully someone can shed some light on this for me.

Thanks for reading!