The Department of Public Health, Division of Disease Control (DDC), extensively reviews disease reports of the city’s reportable conditions to provide an assessment of disease burden in our city. The annual report provides an epidemiological summary of the conditions reported to DDC. The criteria for reporting cases is based on the U.S. Centers for Disease Control and Prevention case definitions for the year.

There are currently 70 medical conditions that health care providers or laboratories must report to the DDC. This document highlights the most commonly reported conditions in Philadelphia. It also includes conditions of special public health importance. It serves as an important resource to summarize Philadelphia disease trends and DDC disease surveillance activities for the year.

For more DDC data and reports, visit the Heath Information Portal.