Education
In 1989, he completed his residency in internal medicine at University of California, San Francisco.
In 1989, he completed his residency in internal medicine at University of California, San Francisco.
Katz was raised in Brooklyn, New York, the youngest of three children. Katz received a Bachelor of Arts degree in psychology at Yale University and received a medical degree at Harvard Medical School. After his residency, Katz remained in San Francisco.
In 1991, he joined the San Francisco Department of Public Health (SFDPH), serving as chief of research and director of the Acquired Immune Deficiency Syndrome Office, director of the Emergency Medical Services Agency and director of the department’s health and safety branch.
From 1997 to 2010, Katz served as the Director of Health and Health Officer for the San Francisco Department of Public Health, where he implemented the Healthy San Francisco program, which is the United States" first municipal universal health care system. During his tenure, Katz also served as a medicine, epidemiology and biostatistics professor at the University of California, San Francisco, while operating an outpatient practice at San Francisco General Hospital"s Positive Healthcare Practice.
In 2010, Katz was recruited by the Los Angeles County Chief Executive Officer William T Fujioka to lead the Los Angeles County Department of Health Services.