Dr Mark is a dermatologist in New York and he is associated with Mount Sinai hospital and mount Sinai berth Israel hospital. He has done his medical school at Harvard Medical school. After that, he did his residency in internal medicine, from 1978-1981 at Icahn School of Medicine at Mount Sinai hospital. Dr Mark completed his residency in dermatology from 1981-1983 at Icahn School of Medicine at Mount Sinai. Dr Mark is in practice in the field of dermatology for over 20 years. He has received his certification from the American Board of Dermatology in the field of dermatology. He also received certification from the American Board of Internal medicine and a NY State Medical License.