Jean Lee - Cancer (Oncology) | Mount Sinai - New York
Jean Lee
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Jean Lee, MD

Cancer (Oncology)

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About Me

Dr. Jean Lee joined Mount Sinai in 2025 as an Oncologist specializing in breast cancer and gynecologic malignancies. After completing her undergraduate studies at the Massachusetts Institute of Technology (MIT), Dr. Lee earned her medical degree from the Albert Einstein College of Medicine. She then moved to the University of Oxford as a Biomedical Scholar under the National Institutes of Health to earn her Doctor of Philosophy degree in Human Immunology. Dr. Lee continued on to New York Presbyterian Hospital – Weill Cornell for her internship and residency in Internal Medicine, followed by her fellowship in Medical Oncology with Memorial Sloan Kettering Cancer Center. Dr. Lee is double board certified by the American Board of Internal Medicine in both Internal Medicine and Medical Oncology.

As a medical oncologist, Dr. Lee's clinical focus is caring for patients with breast cancer and gynecologic malignancies, including uterine (endometrial) cancer, ovarian cancer, cervical cancer and uterine sarcomas. She is particularly passionate about caring for women who have cancers and their unique needs. In addition, with her background in immunology, she has a special interest in incorporating immunotherapy to improve oncologic treatment strategies.

In her professional community, Dr. Lee is a member of the American Society of Clinical Oncology, NRG Oncology, and the  Society of Gynecologic Oncology. She is also involved in academia, as she has held several teaching roles working closely with oncology fellows and medical residents in both clinical and research settings. Dr. Lee continues with this teaching work with Mount Sinai trainees as part of their medical education.

In addition to her clinical practice, Dr. Lee is passionate about bringing innovative treatments to patients through clinical trials and improving clinical outcomes through research. Over the years, she has been involved in both clinical research and clinical trials with the goal of providing novel treatment opportunities to her patients.

When discussing her role as a physician, Dr. Lee explains, "I am dedicated to providing compassionate and personalized oncologic care, and believe in a shared decision-making approach with my patients, to ensure that every treatment plan aligns with their unique needs and goals. I cherish the relationships I build with my patients and their families. I am committed to providing the highest standard of oncologic care, with the goal of enhancing clinical outcomes and quality of life for each of my patients."

Dr. Lee is bilingual and can communicate with her patients in both English and Korean.

Language
English
Position
ASSISTANT PROFESSOR | Medicine, Hematology and Medical Oncology
Hospital Affiliations
  • Mount Sinai Morningside
  • Mount Sinai Queens
  • The Mount Sinai Hospital
  • Mount Sinai West

Clinical Focus

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Education

MD, Albert Einstein College of Medicine
Internship, Internal Medicine

New York Presbyterian Hospital-Weill Cornell

Residency, Internal Medicine

New York Presbyterian Hospital-Weill Cornell

Fellowship, Medical Oncology

Memorial Sloan-Kettering Cancer Center

Certifications

American Board of Internal Medicine

Locations

Insurance Information

Accepted insurance may vary by the doctor’s office location. Please contact the office directly to obtain the most up-to-date insurance information.

Patients with Cigna Medicare Advantage or Humana Medicare Advantage insurance: Please read this important message before booking to find out if out-of-network costs may apply to your next visit.

  • The Blavatnik Family Chelsea Medical Center325 West 15th Street, New York, NY, 10011
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  • Mount Sinai Doctors-Merrick, Hematology/Oncology2209 Merrick Rd, Suite 101, Merrick, NY, 11566
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  • Mount Sinai Doctors-Greenlawn5 Cuba Hill Rd, Greenlawn, NY, 11740
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  • Mount Sinai-Wantagh2020 Wantagh Avenue, Wantagh, NY, 11793
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Physicians who provide services at hospitals and facilities in the Mount Sinai Health System might not participate in the same health plans as those Mount Sinai hospitals and facilities (even if the physicians are employed or contracted by those hospitals or facilities).

Information regarding insurance participation and billing by this physician may be found on this page, and can also be obtained by contacting this provider directly. Because physicians insurance participation can change, the insurance information on this page may not always be up-to-date. Please contact this physician directly to obtain the most up-to-date insurance information.

Insurance and health plan networks that the various Mount Sinai Health System hospitals and facilities participate in can be found on the Mount Sinai Health System website.

Industry Relationships

Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device, biotechnology companies, and other outside entities to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their outside financial relationships.

Dr. Lee has not yet completed reporting of Industry relationships.

Mount Sinai's faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.