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.

If you are scheduled for an appointment with one of our doctors, we request that you call our office to reschedule your appointment if the answer is yes to any of the following questions:

  • Do you have a cough?
  • Do you have a fever?
  • Do you have any flu-like symptoms?
  • Do you have diarrhea?
  • Have you have traveled internationally in the past 14 days?
  • Have you had close contact with anyone who has traveled internationally in the past 14 days?

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.

Rita L. Ritsema, M.D.



  • Gastroenterology

    Board Certified in 1986
  • Internal Medicine

    Board Certified in 1989


301 West Chester Pike
Suite 204
Havertown, PA 19083

Phone: (610) 525-9570
Fax: (610) 527-8805

Education & Training

Medical School

Boston University School of Medicine, Boston, MA.


Thomas Jefferson University Hospital, Philadelphia, PA


Thomas Jefferson University Hospital, Philadelphia, PA


  • Bryn Mawr Hospital
  • Lankenau Hospital
  • Paoli Hospital
  • BMMSA Endoscopy Center

Societies & Memberships

  • American College of Physicians; 1989
  • American Gastroenterological Association; 1987

Teaching & Research

  • Clinical Instructor of Medicine
    Thomas Jefferson University Hospital, Philadelphia, PA. July 1,1986 to July 1,1987
  • Undergraduate Distinction Work in Biology (Comparative Endocrinology)
    Boston University: Sept 1,1977 to May 20,1979
    Advisor: Ian P. Callard, PhD.
  • National Science Foundation Undergraduate Research Participation Program
    Boston University: August 15,1978
    “Evolution of Hormonal Control of Vertebrate Reproduction” ( Dr. Ian P. Callard, Advisor)
  • Laboratory for Human Reproduction and Reproductive Biology
    Harvard Medical School, Boston, MA: June 1,1979 to Sept 1,1980
    Advisor: Robert E. Carraway, PhD


Carraway, R.E., Ruane, S.E., Ritsema, R.L. “Radioimmunoassay For Lys8, Asn9,Neuotensin 8-13: Tissue and Subcelluar Distribution of Immunoreactivity in Chickens.” (Submitted to the Journal of Biological Chemistry, June, 1982).

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