About
Dr. Caroline Messer is the founder of Well by Messer and Fifth Avenue Endocrinology. She comes from a long line of doctors and enjoys focusing on preventive care. Dr. Messer earned her undergraduate degree from Yale University. She then completed her medical degree, internal medicine residency, and endocrinology fellowship at Mount Sinai. She holds board certifications in internal medicine and endocrinology. She also has certifications in densitometry and endocrine neck ultrasound. Dr. Messer serves as a Clinical Assistant Professor at the Mount Sinai School of Medicine.
Education & Training
Undergraduate
Yale University
Medical School
Mount Sinai School of Medicine
Residency
Residency in Internal Medicine at Mount Sinai Hospital
Fellowship
Fellowship in Endocrinology, Diabetes and Metabolism at Mount Sinai Hospital
Certifications
Who is Dr. Messer right for?
Dr. Messer is an excellent choice for patients seeking an expert in endocrinology and preventive medicine. She works well with individuals who want a proactive approach to their health. Patients with concerns about metabolic health, diabetes, and thyroid conditions benefit from her extensive training. She provides thorough, evidence-based care to help patients achieve long-term vitality.
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Frequently Asked Questions
Dr. Caroline Messer is a double board-certified endocrinologist. She specializes in endocrinology, diabetes, and metabolism, with a particular interest in preventive care. She founded Well by Messer to provide comprehensive, personalized medical services.
Dr. Messer received her education and training from several top institutions. She graduated from Yale University. She then earned her medical degree from the Mount Sinai School of Medicine, where she also completed her residency and fellowship.
Yes, Dr. Caroline Messer holds multiple board certifications. She is board certified in both Internal Medicine and in Endocrinology, Diabetes and Metabolism. Additionally, she holds certifications in Clinical Densitometry and Endocrine Neck Ultrasound (ECNU).
Yes, Dr. Messer is a Clinical Assistant Professor at the Mount Sinai School of Medicine. She also serves as an Assistant Professor at the Hofstra School of Medicine. These roles allow her to contribute to medical education.
Dr. Messer is committed to providing superior, personalized care. She comes from a family of doctors and has a passion for preventive medicine. Her approach focuses on helping patients achieve lasting health and confidence through dedicated medical guidance.
Patients interested in proactive and preventive health management are a great fit for Dr. Messer. Her expertise in endocrinology makes her an ideal physician for managing thyroid disorders, diabetes, and other metabolic conditions. She builds strong relationships with her patients.
Doctor profile last updated June 12, 2026
