Mark Sullivan, president & CEO of Catholic Health, has joined the American Hospital Association’s (AHA) Section for Health Care Systems Council, representing health systems across the nation. The 25-member council represent some of the country’s premier health systems, including Cleveland Clinic, Vanderbilt University and New York-Presbyterian. The council represents health system members, which make up about 65 percent of AHA member hospitals. The council is responsible for advising the AHA…