Dr. William Towner headshot

William Towner, MD, FACP, FIDSA

Physician Director

Division of Clinical Trials Research

Principal Investigator

Los Angeles Medical Center

Infectious Diseases



Dr. William Towner is the physician director for Clinical Trials and leads the Clinician Investigator Program for the Southern California Permanente Medical Group. He also serves in a leadership role for HIV Services for Kaiser Permanente Southern California. He has been extensively involved in research on infectious diseases since 2000. His current clinical trial research focuses on HIV, HIV pre-exposure prophylaxis, and vaccine safety and effectiveness.

He is also an associate professor in the Department of Clinical Science of the Kaiser Permanente Bernard J. Tyson School of Medicine.

Dr. Towner has served as principal investigator for 150 clinical trials at Kaiser Permanente. This work has directly informed the scientific community about the effectiveness and safety of emerging medications. He also conducts outcomes research in infectious disease and related vaccines.

Areas of Focus

  • HIV clinical trials
  • Delivery of HIV pre-exposure prophylaxis
  • Infectious disease vaccine safety and effectiveness


University of Southern California
Los Angeles, California
University of California, Los Angeles
Los Angeles, California

Honors and Awards

  • Fellow, American College of Physicians
  • Fellow, Infectious Diseases Society of America