John Jay Shannon, MD. CEO of Cook County Health & Hospitals System (Chicago). Dr. Shannon joined John H. Stroger, Jr. Hospital of Cook County in 1990 after completing his medical training in pulmonary and critical care medicine. He rose in the ranks to direct Stroger's Adult Asthma Clinic before heading south to serve as associate chair of the department of medicine and chief of the division of pulmonary and critical care medicine at Dallas-based Parkland Health & Hospital System. Dr. Shannon was promoted to CMO of Parkland, where he served for five years, before rejoining Cook County Health & Hospital Systems in 2013 as chief of clinical integration. In 2014, the CCHHS Board of Directors unanimously appointed Dr. Shannon CEO to oversee the two-hospital system, which cares for more than 300,000 patients each year.
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