Dr. Marchalik graduated Magna Cum Laude and Phi Beta Kappa from Barnard College, Columbia University. She obtained her medical degree from Georgetown University School of Medicine, where she was inducted into the Alpha Omega Alpha Honor Society. During her time in medical school, she was accepted into a highly prestigious one-year fellowship at the National Institutes of Health as a part of the Medical Research Scholars Program. She completed her Dermatology residency and fellowship in Dermatopathology at Johns Hopkins University. Dr. Marchalik's interests include general dermatology with a focus on complex medical dermatology, cutaneous lymphoma, and alopecia (hair loss).