The B.A.C.K. Center. Harvard University / Beth Israel Hospital,Departments of Orthopaedics and Neurosurgery, Boston Massachusetts Fellowship Spine Surgery. View Profile. S. Farhan Zaidi, MD. Pain Management Physician. Physical Medicine & Rehabilitation. Residency in Physical Medicine and Rehabilitation Albert Einstein College of Medicine..Doctors‧About Us‧Photo Gallery‧Services‧Other Providers‧Virtual Telemed Appointment.