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Sibley Physician Group - Breast Surgery

Breast Surgery

Colette M. Magnant, M.D., FACS
Bonnie Sun, M.D.
Ida Trice, R.N., M.S., FNP-BC
Patient Information and Resources


Colette M. Magnant, M.D., FACS

Colette M. Magnant, MD
Dr. Magnant, Director of Sibley’s Breast Cancer Program, has had 22 years of surgical experience, with 17 dedicated exclusively to breast surgery. Dr. Magnant performs services to ensure compliance with standards of the Joint Commission, serves on medical staff committees, provides administrative leadership, and evaluates and makes recommendations for the continued improvement of Sibley’s multi-disciplinary approach in the diagnosis, care and treatment of breast disease. She has held several academic appointments including Associate Professor of Surgery and Director of Trauma Services at Georgetown University Medical Center.
Special Interest: Breast Surgery
Medical School: Medical College of Virginia
Internship: General Surgery, Indiana University Medical Center
Residency: General Surgery, Georgetown University Medical Center
Board Certification: National Board of Medical Examiners, American Board of Surgery American College of Surgeons, American Board of Surgery, Oral Examiner
Professional Organizations: American College of Surgeons, Washington Academy of Surgery, Southern Medical Association, Society of Surgical Oncology, Pan American Trauma Society, Association for Academic Surgery, District of Columbia Medical Society
Honors, Publications and Other Information: Dr. Magnant, a founding physician of Sibley’s Sullivan Center for Breast Health, is also the recipient of several research grants, has published numerous articles and book chapters in peer reviewed journals and is an invited speaker at scientific conferences and seminars.

Dr. Magnant accepts most insurance carriers.  To make an appointment, call 202-243-5230. 

Bonnie Sun, M.D.

Bonnie Sun, M.D.Dr. Sun is a board-certified and fellowship-trained breast surgeon specializing in breast cancer. From the NCI-designated Norris Cancer Center at University of Southern California in Los Angeles, she returns to the Johns Hopkins School of Medicine as an academic faculty member. She is dedicated to patient care, teaching and research. Her research focuses on optimizing techniques that reduce the risk of recurrence, improve cosmetic outcome and increase quality of life after surgery. Dr. Sun has particular interest in prevention and early detection, oncoplastic surgery, advanced breast cancer as well as benign breast disease. She has a deep understanding of the challenges facing women with breast cancer and employs a comprehensive, multidisciplinary approach in its treatment. 
Undergraduate Degree: Johns Hopkins University
Medical Degree: Penn State University School of Medicine
Residency: University of Southern California, General Surgery
Fellowship: University of Southern California, Breast Surgery
Board Certification:  American Board of Surgery
Appointment: Assistant Professor of Surgery, Johns Hopkins School of Medicine
Medical Societies: American Medical Association, American College of Surgeons, Society of Surgical Oncology, American Society of Clinical Oncology, American Society of Breast Surgeons, Society of Graduate Surgeons
Recognition and Honors: Advanced Trauma Life Support, Pathology Honor Society, Phi Beta Kappa National Honor Society, Golden Key Honor Society
Publications: Dr. Sun has published numerous articles in peer reviewed journals and has presented at the American Society of Breast Surgeons annual meeting.

Dr. Sun accepts most insurance carriers.  To make an appointment, call 202-243-5230.

Learn more about Bonnie Sun, M.D.

Click here to read our Q&A with Dr. Sun and learn more about her approach to breast cancer treatment.


Ida Vaclavik 

Ida Trice, RNIda Vaclavik is a board certified nurse practitioner with a special interest and expertise in breast health.  Before joining Sibley in 2011, Ida worked for 5 years in women's health at Washington Hospital Center. Prior to that, she worked as an R.N. at Virginia Commonwealth University. Ida currently practices in the Sibley Physician Group Breast Surgery office.  

Ida has a high risk clinic and follows patients who have an increased risk for developing breast cancer due to their personal or family history.  In addition to the high risk clinic, she sees patients for a variety of breast complaints including a history of breast cancer, a new breast mass and abnormal imaging.  Ida is also involved in the coordination of the Breast Cancer Survivorship Program and assists the surgeons' clinical management of surgical patients.

Undergraduate Degree: Bachelor of Science in Nursing, Virginia Commonwealth University
Graduate Degree: Masters of Science, Georgetown University
Board Certification: Board-certified Family Nurse Practitioner

Ida Vaclavik accepts most insurance carriers.  To make an appointment, call 202-243-5230.

Patient Information and Resources

Breast Surgery Program
5255 Loughboro Rd. NW
4th Floor Renaissance Building
Washington, DC 20016
Phone: 202-243-5230

Patient Forms:

Sullivan Breast Center
Learn more about the Sullivan Breast Center, a nationally respected comprehensive breast health and breast cancer treatment center.
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