In 1965, Dr. Sarmiento and four other bright and young doctors practicing as the ABM Sison Medical Group, named after the group’s mentor, Dr. Agerico B. M. Sison, decided to put up their own hospital to be able to accommodate their growing number of patients and enhance their practice through modern hospital facilities. They found a place along what is now the bustling San Miguel Avenue in Mandaluyong City, then an isolated, overgrown patch of land with cogonal grass.
Source: https://www.themedicalcity.com/tmc-institutes/apsci/about/augusto-p...