2018-2019 Board of Directors

Walton A. Taylor, MD, FACS

Dr. Walton Taylor is a practicing surgeon in Dallas, Texas. In addition to his position on the board of directors, Dr. Taylor has, since 2009, chaired the Society's Continuing Medical Education Committee. Under his leadership, that committee has been responsible for the Society's successful application to the American Council for Continuing Medical Education, resulting in its designation as an accredited continuing medical education provider and, in 2013, earning the honor of accreditation with commendation. He has also chaired the development and implementation of the Society's Breast Education and Self-Assessment Program, which was designed to help surgeons obtain the self-assessment credits necessary to fulfill the requirements for the American Board of Surgery's Maintenance of Certification part 2. Previously Dr. Taylor, who joined the Society in 2002, served on the Society's Coding and Reimbursement Committee.

The Dallas native graduated from Vanderbilt University, after which he attended medical school at the University of Texas Medical Branch. He completed his residency at UT Southwestern and affiliate hospitals. Dr. Taylor has been voted one of the "Best Doctors in Dallas" annually since 2010.


Jill R. Dietz, MD, FACS

Jill Dietz, MD, is Director of Breast Center Operations at University Hospitals Case Medical Center and Associate Professor of Surgery at Case Western Reserve University School of Medicine. Her office is located at the UH Case Medical Center Chagrin Highlands Breast Center, Beachwood, Ohio.

Dr. Dietz is a Diplomat of the American Board of Surgery and received ABS recertification in 2010. She joined the UH Case Medical Center staff in 2014.

Dr. Dietz earned her undergraduate degree at Allegheny College, Meadville, Pennsylvania, and her Doctor of Medicine from Jefferson Medical College of Thomas Jefferson University, Philadelphia, Pennsylvania. She completed a fellowship in breast surgical oncology and a general surgery residency at Cleveland Clinic, Cleveland, Ohio.

A dedicated researcher, Dr. Dietz has received numerous grants for and has been the Principal Investigator on multiple research studies focused on understanding breast cancer risks. Her areas of research have included infections after surgery, oncoplastic techniques and the role that genetic factors play in developing breast cancer. Dr. Dietz has published multiple peer-reviewed manuscripts related to her research and produced chapters for nearly a dozen textbooks. She has given more than 50 oral presentations at regional and national medical meetings and has been the face and voice of community education about breast cancer on several local and national media outlets.

She is currently a member of the American Society of Breast Surgeons Board of Directors, is on the publications and corporate relations committee, and Society of Surgical Oncology (SSO) SCORE education committee. In addition, Dr. Dietz previously served as Chair of the SSO Program Directors Committee, Chair of the Fellows Institute and Chair of the American Society of Breast Surgeons Annual Meeting in 2013-2014.


Julie A. Margenthaler, MD, FACS

Dr. Julie Margenthaler is the Director of Breast Surgical Services of the Joanne Knight Breast Center at Siteman Cancer Center and Professor of Surgery and Director of the Breast Fellowship Program at Washington University School of Medicine in St. Louis Missouri. She is a graduate of Southern Illinois University School of Medicine and completed her general surgery residency and breast fellowship at Washington University School of Medicine. During her residency, she spent three years studying immune responses to transplantation which provided a foundation for current interests in the areas of cancer genomics and vaccine development. In addition, she has collaborations within the biomedical engineering department to develop methods for minimally invasive staging of axillary lymph nodes and novel molecular imaging devices. Dr. Margenthaler is also heavily involved in the investigation of breast cancer disparities in the St. Louis metropolitan area. Clinical trials of patient and systems delays within the city's safety net system have led to widespread changes in the referral process and a subsequent forty percent reduction in late-stage breast cancer diagnoses in this at-risk population. She has established a breast cancer clinical outcomes program which has resulted in linking of multiple institutional databases, incorporation of large epidemiological, market scan, and quality control databases, and the enlistment of the expertise of statisticians, epidemiologists, and prevention specialists in the Institute for Public Health to create a robust dataset for clinical outcomes and disparities research.

Dr. Margenthaler is board certified by the American Board of Surgery, is a Fellow of the American College of Surgeons, and serves as the Chair of the Communications Committee for the American Society of Breast Surgeons. She was the Program Chair for the 2013 American Society of Breast Surgeons Annual Meeting in Chicago, IL. She has served on committees for the Association for Academic Surgeon, Society of Surgical Oncology, and the American College of Surgeons, and is the Missouri State Chair for the Commission on Cancer. She is Past President of the St. Louis Surgical Society and the Missouri Chapter of the American College of Surgeons. She is currently Associate Section Editor for the Annals of Surgical Oncology, Associate Editor for the Journal of Surgical Research, reviews for 12 other journals, and is the author of over 150 peer-reviewed publications, reviews, editorials, and book chapters. Dr. Margenthaler has given numerous lectures nationally and internationally and is committed to the mission of improving the lives of women with breast diseases and breast cancer.


Shawna C. Willey, MD, FACS
Chairman of the Board

Shawna C. Willey, MD, FACS, is a Professor of Surgery at Georgetown University Medical Center, Chief of the Department of Surgery at MedStar Georgetown University Hospital and Director of MedStar’s Regional Breast Health Program. She also is a member of the Breast Cancer Program at the Lombardi Comprehensive Cancer Center in Washington, D.C.

Dr. Willey is recognized nationally and internationally for her leadership and expertise. A past president of the American Society of Breast Surgeons, Dr. Willey has performed medical mission work and conducted international health education programs throughout the world.

Dr. Willey has a particular interest in the surgical management and surveillance of patients who are gene mutation carriers, especially those who undergo prophylactic mastectomy. She is a pioneer in the field of nipple-sparing mastectomy and has authored several publications and co-edited a textbook on the topic. Dr. Willey has co-chaired four BC3 conferences (Breast Cancer Coordinated Care) that address local and regional control of breast cancer. In addition, she co-edited the second and third editions of Surgery of the Breast and Operative Approaches to Nipple-Sparing Mastectomy.

A native of Iowa, she completed medical school at the University of Iowa and surgical residency at the George Washington University in Washington, DC. Dr. Willey has spent her entire career in the Washington, DC, area, mentoring multiple students, residents and breast surgery fellows. In addition to membership in many other professional organizations, she is a member of the American Society for Breast Surgeons, the American Society for Clinical Oncology and Breast Surgery International. Among her many honors and awards are recognitions as “Top Doctor” (U.S. News & World Report), "Best Doctors,” and “America’s Top Doctors."



Steven L. Chen, MD, MBA, FACS

Steven Chen, MD is a practicing private-practice surgeon in San Diego, California and the Director of Surgical Oncology at OasisMD.  He received his medical degree and completed general surgery and critical care residencies at the University of Michigan, followed by a surgical oncology fellowship at the John Wayne Cancer Institute. Previously, he served as the Chief of Breast Surgery at UC Davis Medical Center, followed by a position as an Associate Professor of Surgery and as the Associate Program Director of the Surgical Oncology Training Program at City of Hope National Medical Center in Duarte, California. Dr. Chen maintains an active breast cancer, melanoma, and endocrine surgery practice and maintains clinical research interests in quality of care measures, health outcomes, and cost-effectiveness. He has been a peer-reviewed funded researcher and is an author on numerous abstracts and publications.  Beyond the American Society of Breast Surgeons, Dr. Chen serves on committees in the American Medical Association, the Society of Surgical Oncology, and the American College of Surgeons, as well as being an active member of the American Society of Clinical Oncology and the Society of University Surgeons. 


Paul Baron, MD
Dr. Paul Baron

Paul Baron, MD, FACS

Paul L. Baron, MD, FACS, is a board certified practicing surgeon in Charleston, South Carolina.  He is Medical Director of the Roper St. Francis Breast Care Program.  Dr. Baron earned his undergraduate and medical degrees from the Boston University Six-Year Medical Program and completed a general surgery residency at the Medical College of Virginia. This was followed by the two-year surgical oncology fellowship at Memorial Sloan-Kettering Cancer Center in New York City.  Recently, he received the Business of Healthcare Certificate from the Carey School of Business at Johns Hopkins University.  Previously, he was an Associate Professor of Surgery at the Medical University of South Carolina and served as the Director of the Breast Program.  Dr. Baron focuses his practice on the care of patients with breast cancer and melanoma, and is active in clinical research. He is also certified in Breast Ultrasound by the American Society of Breast Surgeons. 

In addition to his clinical practice, Dr. Baron is actively engaged in advancing the oncology field. He has published more than 65 papers in peer-reviewed journals and regularly gives presentations to national and regional groups on cancer related topics. He has served on the Board of Directors for the Lowcountry Affiliate of the Susan G. Komen for the Cure and was selected by his peers to serve on the Commission on Cancer for the American College of Surgeons (ACS). He is past president of the Charleston Unit of the American Cancer Society, and was South Carolina State Chairman for the Physician Liaison Program of the Commission on Cancer for the ACS. Dr. Baron is a Fellow of the American College of Surgeons and the Society of Surgical Oncology (SSO), and an active member of the American Society of Breast Surgeons. He serves on the American College of Radiology Appropriateness Expert Panel on Breast Imaging representing the ACS. He also serves on the Board of Directors for the National Accreditation Program for Breast Centers (NAPBC) representing the SSO. 


Peter W. Blumencranz, MD
Dr. Peter Blumencranz

Peter W. Blumencranz, MD, FACS

Dr. Peter W. Blumencranz is a practicing surgeon in Clearwater, Florida. He is Medical Director of The Comprehensive Breast Care Center of Tampa Bay, part of the BayCare Health System. Dr. Blumencranz received his undergraduate degree at the University of Pennsylvania and his medical degree at Cornell University Medical School. He completed surgical residency at The New York Hospital-Cornell Medical Center and a surgical oncology fellowship at Memorial Hospital Sloan Kettering Cancer Center. Dr. Blumencranz also served on active duty in the US Navy.

Dr. Blumencranz has lectured extensively nationally and internationally. He has authored numerous abstracts and publications. Dr. Blumencranz has been a long standing principle investigator for NSABP and ACOSOG(Alliance) and a strong supporter of clinical trials in the community. Some of his research interests have included molecular analysis of sentinel nodes, genomic signatures and neoadjuvant therapy, and breast cancer in octogenarians, a common problem in Florida. He has extensive experience with breast brachytherapy and has worked with industry to bring numerous devices into clinical practice.

Dr. Blumencranz is certified in ultrasound by the ASBS. He is an active member of the Society of Surgical Oncology, Southeastern Surgical Congress and the American Society of Clinical Oncology. He has served as Commission on Cancer Cancer Liaison Physician at Morton Plant Hospital for over 25 years and received their Outstanding Performance Award multiple years.


Susan K. Boolbol, MD, FACS

Susan K. Boobol, MD

Dr. Susan K. Boolbol is a world-class breast surgeon and national thought leader.

In addition to practicing medicine, she had an early career in financial advising on Wall Street and is an expert in wealth management.

She has an MD from George Washington University Medical School and completed her surgery residency at New York Presbyterian Hospital. She pursued a Breast Surgical Oncology Fellowship at Memorial Sloan Kettering Cancer Center and is presently the Chief of Breast Surgery at Mount Sinai Beth Israel and Clinical Director of The Cancer Network for Mount Sinai. In addition to serving as a member of the American Society of Breast Surgeons board of directors, she is the chair of the Society's Corporate Relations Committee. 


Judy C. Boughey, MD, FACS

Judy C. Boughey, MD is a Professor of Surgery at the Mayo Clinic, and is the vice chair for research and medical director of the Clinical Research Office in the Department of Surgery. She is the program director for the Multidisciplinary Breast Surgery Fellowship at Mayo Clinic. Dr. Boughey attended the University of Cambridge where she earned B.A. and M.A. degrees in physiology, and M.B., B.Chir degree. She completed general surgery residency at Palmetto Health Richland Memorial Hospital at the University of South Carolina and fellowship in breast surgical oncology at University of Texas M.D. Anderson Cancer Center.

Dr. Boughey is involved with multiple breast cancer research, including studies on prophylactic mastectomy, sentinel lymph node surgery, neoadjuvant chemotherapy and minimizing axillary surgery after neoadjuvant chemotherapy. Dr. Boughey is a passionate researcher and has led multiple national clinical trials funded by National Cancer Institute; ACOSOG Z1071 evaluating SLN surgery in patients with node positive breast cancer treated with neoadjuvant chemotherapy, ACOSOG Z11102 evaluating breast conservation in women with multiple ipsilateral breast tumors and ALLIANCE A11202 comparing axillary dissection to axillary radiation for patients with node positive disease after neoadjuvant chemotherapy.

Dr. Boughey is author of over 220 peer-reviewed papers as well as 16 book chapters and was an author on SESAP 14 and SESAP 15 and BESAP. She was chair of the Publications Committee for the American Society of Breast Surgeons from 2012 to 2018 and was program chair of the 2016 ASBrS annual meeting. Dr Boughey sat on the Breast Oncology Local Disease (BOLD) Task Force of the NCI Breast Cancer Steering Committee (BCSC) from 2012 to 2016. She was on the Breast Working Group of the SSO from 2012-2014 and has been on the Breast Oncology Program Directors committee from 2010 onwards. She is chair of the Education Committee for the American College of Surgeons Clinical Research Program and on the program committee of ASCO. She is associate section editor of Annals of Surgical Oncology.


Dr. Nathalie Johnson
Dr. Nathalie Johnson

Nathalie G. Johnson, MD, FACS

Dr. Nathalie Johnson is a board-certified oncology surgeon with Legacy Medical Group-Surgical Oncology and medical director of Legacy Cancer Institute and Legacy Breast Health Centers. Dr. Johnson earned her medical degree from the Medical College of Virginia and completed an internship and residency in surgical oncology at the University of Southern California.

Prior to returning to Portland and Legacy Health in 1996, Dr. Johnson was Commissioner of Health for the United States Virgin Islands. In addition to her clinical practice, she plays an active role in breast cancer research projects.


Eric Manahan, MD, FACS

Dr. Eric Manahan is a board certified general surgeon in Dalton, GA. He also serves as Medical Director of Southeastern Breast Care Specialists, which he founded. A Tennessee native, Dr. Manahan attended Auburn University for his undergraduate work. He returned home to medical school at the James H. Quillen College of Medicine at East Tennessee State University where he also completed his general surgery residency. He subsequently completed an MBA at Auburn University.

In addition to his position on the board of directors, Dr. Manahan has been very active in Breast Fellow education and has served on the Education Committee since 2011. He has participated in multiple site visits as the ASBrS representative. He has served as faculty for the Fellows Institute since 2012. He currently co-chairs the Fellows Education Committee, serves on the Education Executive Steering Committee, and is a member of the Corporate Relations Committee. He also serves as the ASBrS representative to the Society of Surgical Oncology and serves on their Training Committee. He has special interests in percutaneous breast procedures.

Dr. Manahan is humbled and honored to be on the board. He is married with twin daughters and serves as an active elder at Christ Church Presbyterian in Dalton, GA.