About
Dr. Kossow earned her B.A. in Psychology Magna Cum Laude with Honors from Bryn Mawr College and her medical degree from the University of Pennsylvania School of Medicine. She then finished her senior year at Graduate Hospital in Philadelphia. After residency, Graduate Hospital invited her to join its Department of Internal Medicine as an attending physician. She relocated to the Princeton area in 1993 and has practiced internal medicine in the Mercer and Middlesex county areas ever since.
Dr. Kossow holds board certification in Internal Medicine from the American Board of Internal Medicine, with recertifications in 2000 and 2008, and board certification in Lifestyle Medicine from the American College of Lifestyle Medicine. She serves as a Clinical Assistant Professor of Medicine at Robert Wood Johnson Medical School and has taught residents and students since 1994. New Jersey Monthly has named her among the Top Doctors in New Jersey, including in 2017. She co-authored two peer-reviewed publications and places strong value on the doctor-patient relationship and preventive care.
Education & Training
Undergraduate
B.A. Psychology, Magna Cum Laude with Honors, Bryn Mawr College, 1984
Medical School
University of Pennsylvania School of Medicine, M.D., 1988
Residency
Washington Hospital Center and Graduate Hospital, Philadelphia
Additional Training
Clinical Assistant Professor of Medicine, Robert Wood Johnson Medical School
Certifications
Who is Dr. Kossow right for?
Dr. Kossow is a strong fit for adults who want a long-term relationship with an experienced internist. Patients focused on preventive care and chronic disease management benefit from her dual expertise. Her background in lifestyle medicine makes her a good match for those addressing health through behavior and nutrition. Adults seeking a physician with deep roots in the Princeton region will find her practice well established.
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Frequently Asked Questions
Dr. Kossow specializes in internal medicine, preventive medicine, and lifestyle medicine. She holds board certification in both internal medicine and lifestyle medicine. Her clinical focus includes weaving evidence-based lifestyle counseling into primary care.
Yes. Dr. Kossow holds board certification in Internal Medicine from the American Board of Internal Medicine, with recertifications in 2000 and 2008. She also holds board certification in Lifestyle Medicine from the American College of Lifestyle Medicine.
D. from the University of Pennsylvania School of Medicine in 1988. She completed her residency at Washington Hospital Center and Graduate Hospital in Philadelphia. After residency, Graduate Hospital appointed her as an attending physician in its Department of Internal Medicine.
Yes. Dr. Kossow serves as a Clinical Assistant Professor of Medicine at Robert Wood Johnson Medical School. She has taught medical residents and students since 1994.
Yes. New Jersey Monthly has named Dr. Kossow among the Top Doctors in New Jersey on multiple occasions, including in 2017. She has also co-authored two peer-reviewed publications.
Dr. Kossow has practiced internal medicine in the Mercer and Middlesex county areas since 1993. She relocated to the Princeton region after completing her residency and early attending work in Philadelphia.
Lifestyle medicine is a core part of Dr. Kossow's approach to primary care. She integrates evidence-based lifestyle counseling into her internal medicine practice. She holds formal board certification in Lifestyle Medicine from the American College of Lifestyle Medicine.
Doctor profile last updated March 21, 2026