Dr. Sadick holds five board certifications in internal medicine, dermatology, cosmetic surgery, hair restoration surgery and phlebology. Dr. Sadick is one of the world’s most respected dermatologists and the medical director and owner of Sadick Aesthetic Surgery and Dermatology with locations on Park Avenue in New York City and Great Neck, Long Island. Dr. Sadick is also the director of the Sadick Research Group, which runs multiple FDA and clinical trials each year.Dr. Sadick has authored over 250 journal publications and has written 15 books on topics such as hair disorders, fillers/toxins, facial rejuvenation, lasers, sclerotherapy and cosmetic surgery. In addition, he has written over 70 book chapters on cosmeceuticals, hair transplantation, lasers and sclerotherapy and has presented more than 450 major academic presentations throughout the world.