Zachary Bregman, MD

Dr. Daria Vasilyeva is an assistant professor at Columbia University's College of Dental Medicine in the Division of Oral and Maxillofacial Pathology. Dr. Vasilyeva completed residency training in Oral and Maxillofacial Pathology at New York-Presbyterian Hospital/Columbia University, an advanced fellowship in Oral Medicine at The MetroHealth System/Case Western Reserve University, and holds a PhD in Science Education from Columbia University’s Graduate School of Education, Teachers College. Dr. Vasilyeva is a member of the Columbia University Oral Diagnostics Biopsy Service, and participates in the clinical oral medicine and oral pathology service at ColumbiaDoctors Midtown. Dr. Vasilyeva's clinical expertise includes diagnosis and treatment of oral mucosal diseases, oral cancer, salivary gland disorders, orofacial pain conditions including temporomandibular joint (TMJ) disorders, and obstructive sleep apnea. Their principal research interests are in collaborative practices in education and healthcare, and digital pathology in research and diagnosis. Dr. Vasilyeva teaches oral pathology at the undergraduate and graduate levels, and has published in both the dental and medical literature.

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 is dermatopathology trained and interests include general dermatology with a focus on alopecia (hair loss).

As a psychologist within Employee Health and Wellness and the Department of Psychiatry and Behavioral Sciences at Memorial Sloan Kettering Cancer Center (MSK), I provide essential psychological support to all employees.