I work for a behavioral health agency and we provide ABA services. A speech language pathologist is looking for a practice space and has asked to rent out a portion of our office to provide services to clients. We would like to be able to offer our current ABA clients the ability to see the SLP either concurrently or in the same day (back to back appointments). Our ABA practice bills under a group NPI with a rendering provider. The SLP will be billing as herself and is not part of our practice just renting space. Can I bill these services concurrently? Can I bill them in the same day if not able to bill at the same time? My biggest concern is the same billing address issue. Thank you for your help.