 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.In 2012, Katz was awarded the National Center for Healthcare Leadership's Gail L. Warden Leadership Excellence Award for his contributions to the health care field.