One of the organizers of the surgery department of the Soldatenkovskaia Hospital (now Botkin Hospital). Chief surgeon of the hospital, 1910. On 23 April 1922, operated on V. Lenin (this was Lenin’s second operation as a result of Dora Kaplan’s attempt on his life, August 1918).
From 1929, chief surgeon of the Kremlin Hospital. Also taught at the Teaching Hospital. Diagnosed Stalin’s paranoia in the early 1930s.