Long Island Osteoporosis and Arthritis Center. We are "The Specialist" in Musculoskeletal Diseases and Osteoporosis. We are located in Central Nassau County with three convenient locations to service patients from Queens, Nassau and Suffolk Counties. Our staff consists of Board Certified Rheumatologists, Physiatrists and Neuromuscular specialists who offer state of the art therapies as a "Center of Excellence". Please visit our website for a list of our approved insurance carriers and additional locations.