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.

Lawrence S. Mendelson, M.D., F.A.C.C.



  • Diplomate, Cardiovascular Diseases, American Board of Internal Medicine

  • Diplomate, Internal Medicine, American Board of Internal Medicine

  • National Board of Echocardiography

    Certification 2001
  • Board of Nuclear Cardiology

    Certification 2008
  • Federal DEA License

  • Pennsylvania State Medical Licensure

  • Diplomate, National Board of Medical Examiners



Bryn Mawr Medical Arts Pavilion
825 Old Lancaster Rd.
Suite 410
Bryn Mawr, PA 19010

Main Line Health Center at Newtown Square
3855 West Chester Pike
Suite 250
Newtown Square, PA 19073

Phone: (610) 527-1165
Fax: (610) 527-6611

  • In practice since: 1996

Education & Training

Undergraduate Education

Bachelor of Arts, Biology, University of Pennsylvania (Philadelphia, PA) : 1986

Medical Education

Doctorate of Medicine: SUNY Health Science Center, Brooklyn, NY : 1990


Internal Medicine, Thomas Jefferson University Hospital (Philadelphia, PA) : 1993


Cardiology, Thomas Jefferson University Hospital (Philadelphia, PA) : 1996


  • Director, Bryn Mawr Hospital Heart Station
  • Bryn Mawr Hospital
  • American College of Cardiology : 1995
  • American Medical Association : 1993
  • American College of Physicians : 1991
  • Director, Bryn Mawr Hospital, Chest Pain Center, Bryn Mawr, PA 19010

Honors & Awards:

Honors, SUNY Health Science Center at Brooklyn : 1986-1987
Magna Cum Laude Graduate, University of Pennsylvania (Philadelphia, PA) : 1986
Dean’s List, University of Pennsylvania (Philadelphia, PA) : 1982-1986

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