Our first priority is the health, wellness and safety of everyone who walks through our doors.

Bryn Mawr Medical Specialists Association is open for medically necessary office visits and procedures only. BMMSA as a corporation is taking all necessary precautions and following public health safety guidelines in regards to the COVID-19 pandemic.

TeleMedicine appointments are now available. Please contact your physicians office for eligibility, additional information, and with any concerns or questions.

As per order of the Commonwealth of Pennsylvania, any person entering our office building is required to wear a face mask at all times. Patients will not be permitted to enter the building without a face mask.

All patients should expect to be phone screened by Bryn Mawr Medical Specialists Association staff for COVID-19 symptoms or exposures prior to their appointment and again upon arrival. Patients should also expect to be temperature screened upon arrival in the office.

If your answer to any of the following questions is “Yes”, we ask that you call to reschedule your appointment.

In the past 14 days, have you developed any fever, cough or shortness of breath?
In the past 14 days, have you developed any of the following new symptoms?

  • Body aches or muscle pains?
  • Chills or repeated shaking with chills?
  • Headache?
  • Sore throat?
  • New loss of taste or of smell?
  • Have you, or anyone you have close contact with, been recently referred for COVID-19 testing?

In the past 14 days, have you traveled outside of PA? If “Yes”, please call the office to notify us of travel BEFORE your appointment. Patients recently returning from travel restricted states or countries will be asked to reschedule their appointment.

For the safety of our staff and other patients, patient family members or companions are not permitted at this time to accompany patients to their appointments (unless medically necessary or the patient is a minor). Bryn Mawr Medical Specialists Association respectfully asks family members or companions to wait outside or safely in their vehicle.

We encourage all of our patients to visit the CDC website and Main Line Health COVID-19 Response website to read more about everyday preventative measures and for the most up to date guidance regarding the Coronavirus (COVID-19). If you are concerned that you may have the Coronavirus (COVID-19), please contact your local Health Departments.

If you have any questions regarding our policy and your appointment, please call your doctor’s office.

Margaret T. Ryan, M.D.



  • Endocrinology

    Board Certified


Bryn Mawr Medical Arts Pavilion
825 Old Lancaster Road
Suite 360
Bryn Mawr, PA 19010

Phone: (610) 527-1604
(610) 525-8018

Dr. Ryan is accepting new patients and treats type 1 and type 2 diabetes, obesity, PCOS, thyroid, parathyroid, pituitary and adrenal disorders along with osteoporosis. She does not treat adrenal fatigue. She does not routinely prescribe Armour thyroid, Naturethroid, compounded hormone products or growth hormone.

Education & Training


Thomas Jefferson University Hospital
Endocrinology Fellowship


The Mount Sinai Hospital


The Mount Sinai Hospital

Medical School

New York University School of Medicine
M.D., 05/2004


Williams College
English and Biology B.A.

Current Memberships & Activities

  • Philadelphia Magazine Top Doctor 2017
  • Main Line Today Top Doctor 2011, 2014, 2015, 2016, 2017
  • Member Endocrine Society
  • Member Philadelphia Endocrine Society

Recent Clinical Studies Published

  • Ryan MT, Mandel S, Miller JL. Hashimoto’s Thyroiditis and the Brain. Practical Neurology. 2008; 7(10): 13-16.
  • 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, 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, 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 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, 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 VW, Hipszer B, Joseph, JI. Continuous Glucose Monitors for Early Hypoglycemia Detection in Hospitalized Patients. Full Manuscript in Preparation


  • Addition of Insulin to Oral therapies in Type 2 Diabetics: Discussion of Holmen et al.’s article in the recent NEJM. Endocrinology Forum, Thomas Jefferson University Hospital. October, 2007
  • Teriparatide Use in Glucocorticoid Induced Osteoporosis. Endocrinology Forum, Thomas Jefferson University Hospital. November, 2007.
  • Intensive Insulin therapy in the Medical ICU: Brunkhorst versus VanDenBerghe. Endocrinology Forum, Thomas Jefferson University Hospital. January, 2008.
  • Pioglitizone, Benefit or Harm: Discussion of the Recent PERISCOPE Trial. Endocrinology Forum, Thomas Jefferson University Hospital. April, 2008.
  • Calcium Disorders: Hypercalcemia, Causes and Management. Internal Medicine Resident Noon Conference. Thomas Jefferson University Hospital. April, 2008
  • Hashimoto’s Encephalopathy: Controversies over the syndrome’s existence, criteria for diagnosis and treatment. Endocrinology Fellows Lecture Series, Thomas Jefferson University Hospital. August, 2008.
  • Continuous Glucose Monitoring in Type 1 Diabetes. Endocrinology Forum, Thomas Jefferson University Hospital. September 2008.
  • Updates in Clinical Endocrinology 2008. Endocrinology Forum, Thomas Jefferson University Hospital. October 2008.
  • Pharmacotherapy of Diabetes Mellitus: Insulin and Non-Insulin Hypoglycemics
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