Our Doctors

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Marie F. Pennanen,  MD, FACS

Breast Surgeon

Director, Chevy Chase Breast Center

At the Chevy Chase Breast Center our aim is to perform the most effective breast surgery in the finest aesthetic way.  What sets us apart is not only our experience, but our personalized and collaborative approach to comprehensive care in a private, reassuring setting. Patients come from all over the world to receive exceptional care with us.

All of our surgeons are Board Certified and recognized by their peers as Washingtonian Top Doctors.

Our Clinical Staff


Thomas G. Zorc, MD, FACS

Breast and General Surgeon

Elizabeth O'Leary, MD, FACS

Breast and General Surgeon

Elizabeth Donovan, PA-C

Physician's Assistant

Mindy Hong, PA-C

Physician's Assistant

Lori Zorc, EdD, RN, ANP-BC, CBPN-IC

Nurse Practitioner

Certified Nurse Navigator

Dace Person, ANP-BC

Nurse Practitioner

Tricia Vogel, RN

Registered Nurse