The Betty Lou Ourisman Breast Health Center at MedStar Georgetown University Hospital offers a full range of sophisticated, proven and promising diagnostic and treatment options, as well as prevention, support rehabilitation and follow up services that support comprehensive treatment for breast disease.

Using a collaborative approach, our experienced team develops treatment plans for both cancerous and non-cancerous conditions based upon your unique diagnosis, overall condition and personal preference. MedStar Georgetown University Hospital is part of the MedStar Breast Health Program which offers geographically dispersed outpatient sites located throughout the region.


Eleni Tousimis, MD, FACS

Robert Warren, MD, MBA, FACP

Shawna Willey, MD, FACS

Other Specialists

Minna Manalo Bacarra, MSN, CRNP, is the lead Nurse Practitioner for the MedStar Breast Health Program. She received her BSN from the University of Virginia in 1994, and MSN from the Institute of Health Professions at Massachusetts General Hospital in 1999, with dual-certification as an Adult and Women's Health Care Nurse Practitioner. Ms. Manalo has previous experience in adult internal medicine at MGH in Boston. In August 2003, she became a certified breast health specialist. Her clinical practice as a certified Nurse Practitioner at MedStar Georgetown University Hospital involves collaborating with our breast surgery team to care for patients with breast cancer. Additionally, she has an independent practice evaluating and treating women at risk for developing breast cancer, as well as other breast health disorders. She also has a passion for clinical research, patient navigation and community outreach.

Lauren C. Collins-Chase, MSN-FNP/MPH, FNP-C, CRNP, BSN, RN, is a certified Nurse Practitioner in the MedStar Breast Health Program at MedStar Georgetown University Hospital and MedStar Health at Lafayette Centre. She received her bachelor's degree in nursing from York College of Pennsylvania in 2011. Ms. Ayres obtained her Master of Science in nursing from The Johns Hopkins School of Nursing and Master of Public Health from The Johns Hopkins Bloomberg School of Public Health in 2017.