John O'Donnell Mangan III, 71, of Blue Bell, a health-care administrator, died Monday, July 16, at Jefferson University Hospital of a stroke.
For 14 years until retiring last month, Mr. Mangan had been an administrator for Keystone Mercy Health Plan's Provider Network Management Department.
Previously, he had a 29-year career with the Philadelphia Department of Public Health, serving in various positions, including as a district director, mental-health delegate, and assistant commissioner. In the early 1980s, he supervised the introduction of computer technology in the department, said his wife, Bernadette D'Ottavi Mangan.
Mr. Mangan graduated from Lansdale Catholic High School. He earned a bachelor's degree in 1963 from what is now St. Joseph's University, and later earned a master's degree in political science from the University of Pennsylvania and a master's degree in urban management from Drexel University. He pursued doctoral studies at Temple University.