A blood bank is established for blood transfusions in the Department of Obstetrics & Gynecology in 1938. In 1939, the Blood Bank is more formally organized under the Central Laboratories. The first blood bank was founded at the Cook County Hospital in Chicago in 1936. In New York, Mt. Sinai opened a blood bank in May 1938.  (Photo taken in 1968 by Camera Associates.)

The calorimeter, used in metabolism research conducted by the Russell Sage Institute of Pathology and Cornell University Medical College, is moved to New York Hospital from Bellevue Hospital. Connected to the research is a small six-bed ward, which would later become the oldest ward dedicated to metabolism research in the country. Dr. Eugene DuBois leads the research, which began in 1913 under the leadership of Dr. Graham Lusk, chair of the Department of Physiology.

Throughout the years, the medical center has grown to become a premier health center.  Some of the people who produced pioneer research or treatments were Drs.

Both New York Hospital and Cornell University Medical College maintained individual control of their respective departments and administrative operations. The medical center was structured on a university system with five major clinical departments: medicine, surgery, pediatrics, obstetrics & gynecology, and psychiatry linked administratively. In these five clinical areas, the chairs of the college departments were the heads of the corresponding hospital departments. The pathology and radiology departments of the hospital and medical college were also linked in the same way.

The Society of the New York Hospital established the New York Hospital Training School for Nurses in 1877 at its second location on West 15th and 16th Streets.

The Central Brewing Company and several row houses that were on the site of the medical center were demolished in 1929.