Martin Kršák, MD, MSC, MBA, FASAM, is a physician board-certified in Internal Medicine, Infectious Diseases, and Addiction Medicine.
Before joining MedNOW Clinics, he worked as a primary care physician at the Colorado Department of Corrections (CDOC). Before CDOC, he worked as faculty with the Division of Infectious Diseases at the University of Colorado School of Medicine.
Preceding his relocation to Colorado, he practiced at Lemuel Shattuck Hospital in Jamaica Plain, Massachusetts, a Department of Public Health hospital serving indigent, incarcerated, marginalized, and substance-misusing populations.
Dr. Kršák’s special professional interests include mental health care in primary care settings, including the utilization of ketamine-assisted and psychedelic-assisted therapies. He is interested in the broader utilization of telemedicine and digital monitoring devices in healthcare, and the impact of various medical interventions on public health and healthcare economics. Dr. Kršák also contributes to clinical research and medical student teaching, holding positions as clinical associate professor of medicine with the University of Colorado School of Medicine and as Editor-in-Chief at Sage Open Chronic Disease scientific journal.
Dr. Kršák grew up in Slovakia (former Czechoslovakia) and received his medical doctorate (M.D.) at Jessenius Medical Faculty, Comenius University in Martin, Slovakia. He completed Internal Medicine residency at Caritas (later renamed to Steward) Carney Hospital in Dorchester, MA (a Tufts University affiliate), and his infectious diseases training at the Tufts University ID fellowship program (Tufts Medical Center, Lahey Hospital and Lemuel Shattuck Hospital). At Tufts, he completed his Master of Science (M.Sc.) degree in Clinical and Translational Medical Science. He also completed a master’s degree in business administration (M.B.A.) at the University of Colorado in Denver in December 2025.