HomePhysiciansMargaret T. Ryan, MD
Phone: (646) 760-3256
Fax: (646) 974-9714

Mon - 9:00am - 5:00pm
Tue - 9:00am - 5:00pm
Wed - 9:00am - 5:00pm
Thu - 9:00am - 5:00pm
Fri - 9:00am - 5:00pm

110 East 60th Street
Suite 802
New York, NY 10022


Dr. Meg Ryan has been working in private practice endocrinology since 2009. She joined Well by Messer in 2023 after relocating from Philadelphia, where she was in private practice for 13 years and was the head of the Division of Endocrinology at Riddle Memorial Hospital. Dr. Ryan has extensive experience managing obesity, PCOS and the menopausal transition as well as other common endocrine issues including thyroid dysfunction, osteoporosis, diabetes and pituitary disorders. She was included in Castle Connolly’s Top Doctors list for the Philadelphia Metro area from 2013-2024 and has been the recipient of the Castle Connolly Exceptional Woman in Medicine Award since 2020.

Dr. Ryan’s goal is to help people find ways to live better and feel their best. She collaborates with patients to achieve what matters most to patients (which is not necessarily the same as what matters most to physicians). Dr. Ryan is particularly excited to be working in weight management today because of the amazing medical breakthroughs in the field over the past several years.



Adrenal adenomas (adrenal masses), Amenorrhea/oligomenorrhea (absent or infrequent menstrual periods), Cushing’s disease (elevated cortisol levels), Difficulty losing weight, Gender-affirming hormone treatment, Gestational diabetes, Gynecomastia (breast formation in males), Hyperaldosteronism (elevated aldosterone levels), Hypercalcemia/hypocalcemia (high and low calcium levels), Hyperlipidemia (high cholesterol levels), Hyperparathyroidism (high parathyroid hormone levels), Hyperthyroidism, Hypothyroidism, Hypoglycemia (low blood glucose levels), Menopausal Transition, Osteopenia (precursor to osteoporosis), Osteoporosis, Pheochromocytoma (elevated adrenaline levels), Pituitary adenomas (pituitary masses), Polycystic ovary syndrome, Prolactinomas (elevated levels of the hormone that produces breast milk), Thyroid cancer, Thyroid nodules, Type 1 diabetes, Type 2 diabetes



Referral Status

From Patients

From Physician

From Website

Medicare Status

Not known at this time


Williams College

Medical School

NYU School of Medicine


Mount Sinai Hospital, Internal Medicine


Thomas Jefferson University Hospital, Endocrinology, Diabetes and Metabolism

Professional Achievements
Board Certifications
  • Endocrinology, Diabetes and Metabolism
  • Internal Medicine
  • Endocrinology Top Doctor in the Philadelphia Metro Area 2013-2024
  • Exceptional Woman in Medicine Award 2020-2023
  • Endocrine Society Student Achievement Award 2004
  • Ryan MT, Jabbour SA. Sodium Glucose Cotransporter 2 Inhibitors. In: Metabolic Syndrome: Underlying mechanisms and Drug Therapies. Wiley and Sons, 2011. p. 359-376

  • Ryan MT, Savarese V, Jabbour SA. Severe, acute dermatoses due to metabolic, endocrine and nutritional disorders. In: Wolf R, Davidovici B, Parish JL, Parish LC (eds): Emergency Dermatology. Cambridge University Press. 2010

  •  Ryan MT, Savarese VW, Hipszer B, McCullen MK, Jose T, Joseph JI. Continuous Glucose Monitoring Improved Detection of Hypoglycemia in Hospitalized Patients. Abstract Poster Presentation at: AACE 19th Annual Meeting and Clinical Congress. April 2010

  •  Ryan MT, Savarese VW, Hipszer B, Joseph JI. Brief Report: Continuous Glucose Monitor (CGM) shows potential for early hypoglycemia detection in hospitalized patients. Diabetes Technology and Therapeutics. 2009; 11(11): 745-747

  •  Ryan MT, Furlong K, Jabbour SA. A Late Presentation of Thyrotoxicosis from functioning metastases in Metastatic Thyroid Carcinoma. EndoTrends, Endocrine Fellows Foundation. 2009; 16(2): 12-13

  •  Ryan MT, Mandel S, Miller JL. Hashimoto’s Thyroiditis and the Brain. Practical Neurology. 2008; 7(10): 13-16