Dr. Horberg is Executive Director Research, Community Benefit and Medicaid Strategy of the Mid-Atlantic Permanente Medical Group (MAPMG) and the director of the Mid-Atlantic Permanente Research Institute (MAPRI). In that capacity, he is responsible for all research activities in Kaiser Permanente Mid-Atlantic States, as well as the Community Benefit leader for MAPMG. Dr. Horberg serves as director of HIV/AIDS program-wide for Kaiser Permanente and as Clinical Lead for HIV/AIDS for the Care Management Institute. Dr. Horberg has served on the Presidential Advisory Council on HIV/AIDS, having co-chaired the Access to Care and Improved Outcomes Committee. Dr. Horberg is a Fellow of the American College of Physicians and the Infectious Disease Society of America (IDSA). He is Past-Chair of the Board of Directors of the HIV Medicine Association of IDSA. He presently serves on the IDSA Quality Performance Committee. Dr. Horberg is a commissioner of the State of Maryland Natalie M. LaPrade Medical Cannabis Commission. Additionally, he is a Fellow of Kaiser Permanente Institute for Health Policy. He is past-president of the national Gay and Lesbian Medical Association.

His HIV research interests are health service outcomes for HIV-infected patients (including HIV quality measures and care improvement, and determinants of optimized multidisciplinary care for maximized HIV outcomes), medication adherence issues in these patients, and epidemiology of the disease. He also now serves as the MAPRI principal investigator for the Kaiser Permanente Research Bank (national genomics initiative). Other research interests include other sexually transmitted diseases and hepatitis. Dr. Horberg has published over ninety-five manuscripts and delivered over one hundred presentations at scientific meetings; all are in peer-reviewed literature or conferences. He has chaired multiple Expert Panels on HIV-related provider performance measures (including ones sponsored by CMS, NCQA, and IDSA), and has served on NIH and CDC peer-review panels.

Dr. Horberg graduated from Boston University’s College of Liberal Arts and School of Medicine (with honors of Summa cum Laude and Phi Beta Kappa) and completed his internal medicine residency at Michael Reese Hospital in Chicago (University of Chicago affiliate). He received his Master of Advanced Studies (Clinical Research) from University of California San Francisco. Dr. Horberg is married to Chip, and they live in DC.