About
Dr. Melissa Sum is a board-certified internist and endocrinologist, and a Fellow of the American Association of Clinical Endocrinology (FACE). She graduated summa cum laude and Phi Beta Kappa from Columbia College with honors in chemistry, then earned her medical degree from Columbia University. She completed her internal medicine residency at Barnes-Jewish Hospital/Washington University, serving an additional year as Medical Chief Resident. She then returned to Columbia for an NIH Fellowship in Endocrinology, where she was selected as a Women's Health Scholar and worked at the Center for Menopause, Hormonal Disorders, and Women's Health.
Dr. Sum later joined NYU, rising to Associate Professor and serving as Medical Director of the Diabetes and Endocrine Associates practice. She also served as Content Director of the endocrinology module for first-year medical students at NYU Grossman School of Medicine, earning NYU's Rising Educator, Pre-Clerkship Educator of the Year, and Faculty Teacher of the Year honors. She specializes in longitudinal medical care, metabolic health, endocrine disorders, and women's health including menopause and hormonal conditions. She treats every patient with the same care she would give a family member, taking time to understand each person's goals, nutrition, exercise habits, and values.
Education & Training
Undergraduate
Columbia College, summa cum laude, Phi Beta Kappa, honors in chemistry
Medical School
Columbia University
Residency
Internal Medicine, Barnes-Jewish Hospital/Washington University; additional year as Medical Chief Resident
Fellowship
NIH Fellowship in Endocrinology, Columbia University; selected as Women's Health Scholar at the Center for Menopause, Hormonal Disorders, and Women's Health
Certifications
Conditions Treated
Who is Dr. Sum right for?
Dr. Sum is a strong fit for adults managing endocrine or metabolic conditions. Patients with diabetes, thyroid disorders, menopause, or hormonal imbalances benefit from her specialized training. Women navigating perimenopause or complex hormonal health find her background at the Center for Menopause and Hormonal Disorders particularly relevant. She also works well with patients who want a thorough, relationship-centered approach to preventive care.
Similar Doctors Nearby
Dr. Bojana Jankovic WeatherlyMD FACP MSc FMCP-M MSCP
hypothyroidism, Hashimoto's thyroiditis, IBS +25 more
Dr. Meryl KahanMD
perimenopause, menopause, hormonal imbalance +14 more
Dr. Kathleen LégerMD
hormonal imbalances, kidney disease, critical illness +5 more
Frequently Asked Questions
Dr. Sum treats a broad range of endocrine and metabolic conditions. Her focus includes diabetes, thyroid disorders, menopause, hormonal imbalances, and metabolic health. She also provides longitudinal primary care, preventive medicine, and women's health services.
Yes. Dr. Sum holds board certification in both internal medicine and endocrinology. She also holds the Fellow of the American Association of Clinical Endocrinology designation, known as FACE.
Dr. Sum earned her undergraduate degree from Columbia College and her medical degree from Columbia University. She completed her internal medicine residency at Barnes-Jewish Hospital and Washington University, then returned to Columbia for an NIH Fellowship in Endocrinology.
Dr. Sum treats every patient with the same care she would give a family member. She takes time to understand each person's nutrition, exercise habits, goals, and values. Her care plans are lifestyle-focused and tailored to long-term wellness.
Yes. Dr. Sum has deep expertise in women's hormonal health, including menopause and related conditions. During her NIH fellowship, Columbia selected her as a Women's Health Scholar and placed her at the Center for Menopause, Hormonal Disorders, and Women's Health.
Dr. Sum served as Associate Professor at NYU and as Medical Director of the Diabetes and Endocrine Associates practice. NYU honored her with multiple teaching awards, including Faculty Teacher of the Year. She also served as Content Director of the endocrinology module for first-year students at NYU Grossman School of Medicine.
MD² Gramercy Park opens in spring 2026. Prospective patients can reach out now to learn more about joining the practice before doors open.
Doctor profile last updated March 21, 2026