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A headshot of Michael A. Horberg, MD, MAS, FACP, FIDSA

Michael A. Horberg, MD, MAS, FACP, FIDSA


Dr. Michael Horberg has devoted much of his research to health service outcomes for HIV-infected patients, medication adherence issues in these patients, and epidemiology of the disease. His other research has concentrated on hepatitis and other sexually transmitted diseases. Dr. Horberg has taught medical students for over two decades and has dedicated his energy to supporting associations for gay and lesbian medical students and staff.

Education and Training

  • BA, summa cum laude, Boston University
  • MD, Boston University School of Medicine
  • Residency, Categorical Internal Medicine, University of Chicago/Michael Reese Hospital
  • MAS, University of California at San Francisco


Selected Prior Positions

1990-1996 Assistant Clinical Professor
University of Illinois College of Medicine in Chicago
1998-2010 Clinical Instructor
Stanford University Medical School
2003-present Director
HIV/AIDS and STDs, Kaiser Permanente and the Permanente Federation Care Management Institute
2010-2012 Clinical Assistant Professor (Affiliated) of Medicine (Infectious Diseases)
Stanford University Medical School
2010-present Fellow
Kaiser Permanente Institute for Health Policy
2011-present Executive Director Research, Community Benefit, and Medicaid Strategy
Mid-Atlantic Permanente Research Institute
2012-present Chair
Health Care Action Group, CDC Coalition on Sexual Health
2016-2018 Member
PCORnet Engagement Council, Patient-Centered Outcomes Research Institute (PCORI)


Selected Honors and Awards

1994-1996 President
Gay and Lesbian Physicians of Chicago
1997-1998 President
Gay and Lesbian Medical Association
2012-2013 Chair
HIV Medicine Association of the Infectious Disease Society of America
1997-present Fellow
American College of Physicians
2006-present Executive Committee Member
Forum for Collaborative HIV Research
2010-2014 Member
Presidential Advisory Council on HIV/AIDS (Obama appointee)
2011-present Fellow
Infectious Disease Society of America (IDSA)

Selected Publications

Peer-reviewed research manuscripts

  • Silverberg M, Leyden W, Leibowitz A, Hare C, Jang H, Sterling S, Catz S, Parthasarathy S, Horberg M, Satre D. Factors Associated with Hazardous Alcohol Use and Motivation to Reduce Drinking among HIV Primary Care Patients: Baseline Findings form the Health and Motivation Study. Addictive Behaviors 2018;84:110-117.
  • Yarborough B, Chi F, Green C, Hinman A, Mertens J, Beck A, Horberg M, Weisner C, Campbell C. Patient and System Characteristics Associated with performance on the HEDIS Measures of Alcohol and Other Drug Treatment Initiation and Engagement. Journal of Addiction Medicine 2018 March 19; e-pub ahead of print.
  • Horberg M, Hurley L, Towner W, Kadlecik P, Antoniskis A, Mogyoros M, Brachman P, Remmers C, Gambatese R, Blank J, Ellis C, Silverberg M. The HIV Care Cascade Measured Over Time and by Age, Sex, and Race in a Large National Integrated Care System. AIDS, Patient Care, and STDs, 2015; 11: 582-590.
  • Horberg M, Blank J, Rubenstein K, Certa J, Hurley L, Kadlecik P, Klein D, Silverberg M. Impact of Alternative Encounter Types on HIV Viral Suppression Rates in an Integrated Health System. AIDS, Patient Care, and STDs, 2018 (in press).
  • Horberg M, Oakes A, Hurley L, Towner W, Chao C, Silverberg M, Chantra J, Ellis C, Quesenberry C. Association of Raltegravir Use with Long-Term Health Outcomes in HIV-Infected Patients: An Observational Post-Licensure Safety Study in a Large Integrated Healthcare System. HIV Clinical Trials, 2018 (in press).