Professor, Doctor of medical Sciences, Head of the Department of Polyclinic therapy MSMSU. L. B. Lazebnik is included in the Presidium of the clinical section of the European branch of the International Association of gerontology and to the Presidium of the International Association of gastroenterologists. He has supervised 14 doctoral and 70 master's theses, is the author of 796 scientific works, 9 monographs, 14 inventions, develops research directions in the areas of gerontology, internal medicine, cardiology, gastroenterology, healthcare organization.