Career
He treated well-known people as Samuel Marshak, Martiros Saryan, Dmitri Shostakovich, Vyacheslav Molotov and others He was one of the doctors named in the fabricated Joseph Stalin"s Doctors" Plot in 1953 in spite of the fact that he had already died by the time when the first article about the plot was published. He was the brother of Boris Borisovich Kogan, who was also a doctor named in the Doctor"s Plot and later arrested, and jailed.