
Mary L. Gemignani, MD, MPH, FACS
Breast Surgeon
My Role at MSKWe post reviews for MSK healthcare providers who have at least 30 patient experience surveys completed. If you do not see reviews for a provider, it may be because they do not yet have enough survey responses, or the provider may not be part of the group of healthcare providers included in the survey.
Only outpatient providers are included in the survey. Healthcare providers who only work in the hospital or in urgent care are not included in the survey. Pathologists or researchers who do not provide direct care to patients do not have reviews.
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About Me
- Director, Breast Surgical Fellowship Training Program
- Co-Director, Young Women with Breast Cancer Program
I am a surgeon who specializes in the diagnosis and treatment of breast cancer. I also have expertise in caring for people with hereditary breast cancer, which is linked to family history and/or changes in BRCA genes that raise a person’s risk of getting the disease.
As co-Director of the Young Women with Breast Cancer Program at Memorial Sloan Kettering Cancer Center (MSK), I help lead a team that specifically focuses on treating young women with this disease. We also address fertility concerns and other unique quality-of-life issues they face.
Early on in medical school, I knew that I wanted to dedicate my career to women’s health and cancer care. I aim to provide hope and support as women with cancer navigate one of the most difficult times in their lives. At the end of a consultation, I hope each of my patients feels that they have the information they need to make decisions about their treatment. I want them to have less fear about their diagnosis and to know that I will be with them to help and guide them through their journey.
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I work with a team of outstanding colleagues in medical oncology, radiation oncology, and plastic surgery to make a comprehensive treatment plan tailored to each individual’s needs and preferences.
I am experienced in the most advanced surgical techniques and perform about 300 procedures each year. I provide care that takes into account quality of life concerns for women with breast cancer, including cosmetic outcomes. When appropriate, I offer cosmetic options such as nipple sparing mastectomy and aim to minimize the side effects of breast cancer surgery. It’s my goal to help my patients get back to their lives as quickly as possible after surgery.
I joined MSK in 1996 and completed fellowships in both breast surgery and gynecologic oncology. I have been practicing at MSK ever since. My dual training, research interests, and experience make me uniquely suited to provide expert care for people with hereditary breast cancer. This includes doing risk-reducing double mastectomies for women with BRCA mutations or other familial risks.
My research focuses on patient-reported outcomes and ways to improve patient experiences and quality of life during cancer treatment and beyond. This involves studying symptoms and side effects after surgery directly from the patient’s perspective. We use this information to find ways to improve the surgical experience for our patients.
I am the Director of MSK’s Breast Surgical Fellowship Training Program, which prepares a highly selected group of surgeons choosing to specialize in breast surgery. I am an active member of local, national, and international societies. These include the American College of Surgeons, the Society of Surgical Oncology, the American Society of Breast Surgeons, and the American Society of Clinical Oncology.
Outside of work, I am an avid runner and I enjoy spending time with my family.
A breast surgeon is a doctor with special training in surgery on breasts.
My Specialties
- Breast Cancer
Education
- MD, Mount Sinai School of Medicine
- MPH, Mailman School of Public Health, Columbia University
Residencies
- Obstetrics and Gynecology - SUNY Health Science Center at Brooklyn
Fellowships
- Gynecologic Oncology - Memorial Sloan Kettering Cancer Center
- Breast Surgery - Memorial Sloan Kettering Cancer Center
Board Certifications
- Gynecologic Oncology
- Fellowship certification Breast Surgery
Insurance Information
Understanding your insurance options is an important part of managing your cancer care. We have relationships with many common healthcare providers and plans.
In Network Coverage Type
PPO
In Network Coverage Type
HMO, PPO
In Network Coverage Type
HMO, EPO PPO, POS
In Network Coverage Type
PPO
In Network Coverage Type
EPO
In Network Coverage Type
EPO
In Network Coverage Type
Federal Government
In Network Coverage Type
PPO, POS, EPO, HMO
In Network Coverage Type
State Government
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If you don't have health insurance or are worried that your care may not be fully covered, our financial assistance programs may be able to help.
If you have questions about insurance, call us at 646-497-9176.
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Contact and Location
Dr. Gemignani sees patients at one location.
Looking to see a doctor at a different location? See all MSK locations.
Colleagues
Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.
Clinical Trials

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.
You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.
Search clinical trialsResearch and Publications
Visit PubMed for a full listing of Dr. Gemignani’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.
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Disclosures
Doctors and faculty members often work with pharmaceutical, device, biotechnology, and life sciences companies, and other organizations outside of MSK, to find safe and effective cancer treatments, to improve patient care, and to educate the health care community.
MSK requires doctors and faculty members to report (“disclose”) the relationships and financial interests they have with external entities. As a commitment to transparency with our community, we make that information available to the public.
Mary L. Gemignani discloses the following relationships and financial interests:
No disclosures meeting criteria for time period
If you’re a patient at MSK and would like more information about your doctor’s external relationships, please talk with your doctor.
The information published here is for a specific annual disclosure period. There may be differences between information on this and other public sites as a result of different reporting periods and/or the various ways relationships and financial interests are categorized by organizations that publish such data.
This page and data include information for a specific MSK annual disclosure period (January 1, 2022 through disclosure submission in spring 2023). This data reflects interests that may or may not still exist. This data is updated annually.
Learn more about MSK’s COI policies here. For questions regarding MSK’s COI-related policies and procedures, email MSK’s Compliance Office at [email protected].