Kessler Rehabilitation Center is New Jersey's premier provider of comprehensive outpatient physical therapy services Kessler Rehabilitation Center is New Jersey's premier provider of comprehensive outpatient services. With a network of 75 outpatient physical therapy centers located throughout the state, Kessler specializes in the treatment of sports, orthopedic, hand and work-related injuries. Our team of more than 200 physical, occupational and speech therapists, along with other rehabilitation specialists, focus on providing exceptional care and unparalleled customer service.