About
Dr. Sarah Fishman is a board-certified endocrinologist in private practice in Midtown Manhattan. She earned both her MD and PhD at Mount Sinai School of Medicine. She then completed her internal medicine residency and endocrinology fellowship at Lenox Hill Hospital, where she holds an academic appointment as associate professor.
Dr. Fishman also holds board certification in obesity medicine and a Certified Nutrition Support Clinician credential. Her clinical focus spans diabetes and insulin resistance, thyroid disease, osteoporosis, PCOS, pituitary and adrenal disorders, and metabolic health. She has conducted research on biomarkers that identify diabetes patients at elevated cardiovascular risk. During the peak of the COVID-19 pandemic, she served as the in-house endocrinologist at Lenox Hill Hospital, working alongside critical care teams to develop endocrine protocols. She mentors residents and endocrine fellows and has contributed expert commentary to publications including Forbes, Allure, and Parade. Outside the office, she enjoys DIY projects with her kids, NYC parks, and an active synagogue community.
Education & Training
Medical School
Mount Sinai School of Medicine
Residency
Internal Medicine, Lenox Hill Hospital
Fellowship
Endocrinology, Lenox Hill Hospital
Certifications
Conditions Treated
Who is Dr. Fishman right for?
Dr. Fishman is an excellent fit for adults managing complex endocrine conditions such as diabetes, thyroid disorders, PCOS, or adrenal and pituitary disease. Patients seeking medically supervised weight loss with nutrition guidance and body contouring options will find her approach comprehensive. Those who want remote monitoring through CGM technology benefit from her ability to track trends between visits. Adults navigating reproductive hormone concerns, osteoporosis, or metabolic health questions also align well with her clinical scope.
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Frequently Asked Questions
Dr. Fishman treats a wide range of endocrine conditions. These include type 1 and type 2 diabetes, insulin resistance, hypothyroidism, hyperthyroidism, Hashimoto's thyroiditis, Graves' disease, thyroid nodules and cancer, osteoporosis, PCOS, adrenal disorders, pituitary disorders, calcium disorders, and reproductive hormone conditions such as menopause and low testosterone. She also treats obesity as a primary medical condition.
Yes. Dr. Fishman holds board certification in obesity medicine. She also carries the Certified Nutrition Support Clinician credential. Her foundational training in internal medicine and endocrinology took place at Lenox Hill Hospital.
Dr. Fishman takes a technology-forward approach to diabetes care. She uses continuous glucose monitoring systems and insulin pumps to track patients closely. Her remote monitoring capability lets her identify dangerous glucose trends as they occur, even between office visits. Her research background focuses on biomarkers that predict cardiovascular risk in patients with diabetes.
Yes. Dr. Fishman offers medically supervised weight loss programs that combine her obesity medicine expertise with clinical nutrition support. She collaborates with registered dieticians on personalized meal planning and eating recommendations. The practice also offers non-invasive metabolic analysis and non-surgical body contouring as complements to weight loss care.
Dr. Fishman earned her MD and PhD at Mount Sinai School of Medicine. She completed her internal medicine residency and endocrinology fellowship at Lenox Hill Hospital, where she now serves as an associate professor. She actively mentors residents and endocrine fellows.
Yes. Dr. Fishman has researched biomarkers that identify diabetes patients at higher cardiovascular risk. She has also studied the use of continuous glucose monitors in hospitalized patients and led projects to improve physician and nurse empathy toward patients with diabetes. During COVID-19, she helped develop endocrine protocols for critically ill patients at Lenox Hill Hospital.
Yes. Dr. Fishman uses continuous glucose monitoring technology, including the FreeStyle Libre system, to monitor patients remotely. She offers a CGM data upload portal so she can review readings between visits. This allows her to spot harmful trends and respond before they escalate.
Yes. Thyroid disease is a core part of Dr. Fishman's clinical practice. She evaluates and manages thyroid nodules, thyroid cancer, Hashimoto's thyroiditis, Graves' disease, hypothyroidism, and hyperthyroidism. Her endocrinology training and ongoing academic work keep her current on evolving thyroid care standards.
Doctor profile last updated August 17, 2026