Dr. Westergaard attended medical school at Johns Hopkins University. He completed a primary care internal medicine residency at the University of Colorado at Denver, where he was also a staff physician at Denver Health Medical Center. He received fellowship training in infectious diseases at Johns Hopkins Hospital and the Johns Hopkins AIDS Service, and completed clinical research training at the Bloomberg School of Public Health under the mentorship of Dr. Gregory Kirk. His current research projects involve interventions to improve quality and continuity of care for HIV-infected patients, with special emphasis on people with psychiatric illness, people who use drugs and prisoners.