Teresa P. Diaz-Montes, M.D., MPH, FACOG

Associate Director, The Lya Segall Ovarian Cancer Institute at Mercy

Medical Director, The Neil B. Rosenshein, M.D., Institute for Gynecologic Care at Annapolis

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Ovarian Cancer Institute at Mercy - Baltimore, MD

A 2020 Top Doc - Baltimore magazine

Gynecologic Oncology Center Board Certified: Specialties: Areas Of Interest: Languages Spoken: Phone: Fax: Locations:

Teresa P. Diaz-Montes, M.D., MPH, FACOG, serves as the Associate Director of The Lya Segall Ovarian Cancer Institute and Medical Director of The Neil B. Rosenshein, M.D., Institute for Gynecologic Care at Annapolis. She also is a noted expert and gynecologic oncologist with The Gynecologic Oncology Center at Mercy, a leading Center in Baltimore for the treatment of cancers of the female reproductive tract. Dr. Teresa Diaz-Montes provides diagnosis and treatment for gynecologic cancers including ovarian cancer, cervical cancer, uterine cancer, vaginal cancer and vulvar cancer.

Expertise in Gynecologic Cancers and Minimally Invasive Surgery Options

Board Certified in Gynecologic Oncology, Dr. Teresa Diaz-Montes provides treatment for a diverse range of gynecologic cancers. Her primary clinical interests include ovarian cancer treatments, minimally invasive gynecologic surgery, including robotic surgery, and patient safety and quality. Additional areas of interest include cervical cancer, fallopian tube cancer, fertility-sparing surgery and uterine, vaginal and vulvar cancers. 

Bringing a friendly approach to the treatment of her patients, Dr. Diaz-Montes takes the necessary time to listen to the needs of her patients and address their concerns. As a recipient of the Patient's Choice award, her approachable, caring bedside manner has been formally recognized by her patients.    

Dr. Teresa Diaz-Montes is known for her knowledge and dedication to finding advanced treatments for gynecologic cancers. Her expert opinion is often sought by media outlets and she has been featured in notable publications such as The Wall Street Journal and The New York Times. She was also featured by The Sun Magazine as "One of 50 Women to Watch" for her dedication to innovative treatments for ovarian cancer. 

Advancing Gynecologic Oncology Treatments with Research and Teaching Activities

Dr. Teresa Diaz-Montes has extensive experience in research and resident teaching activities. She has conducted various clinical trials to advance the care of gynecologic cancers, particularly ovarian cancer. She and colleagues in The Institute for Cancer Care at Mercy are conducting the first clinical study in the United States regarding treatment of ovarian cancer with hyperthermic intraperitoneal chemotherapy, also known as HIPEC.

Dr. Diaz-Montes, an author and international lecturer, has numerous clinical publications related to women’s cancer treatment to her credit.

Awards and Honors

  • Top Doctor in Gynecologic Oncology, Baltimore magazine
  • Top Doctor in Gynecologic Oncology, Castle Connolly Medical Ltd.
  • Top Doctor in Anne Arundel County, What's Up Annapolis magazine

Education & Fellowships
  • Fellowship - Johns Hopkins Hospital
  • Master of Public Health - Johns Hopkins University
  • Residency - University District Hospital, San Juan, Puerto Rico
  • Medical Degree - University of Puerto Rico School of Medicine
Patient Stories
Paige - The Gynecologic Oncology Center at Mercy


Mercy patient Paige was determined in her fight against stage 4 ovarian cancer; she was up and walking around the day after her cancer surgery.  

Surgical Oncology at Mercy - Baltimore, MD


Susan, a longtime journalist, had plenty of practice making sense of complicated issues within a short time period. When faced with her own ovarian cancer diagnosis she drew on past experience to seek out the top experts and the best treatment options.

Associations & Memberships
  • American Congress of Obstetrics and Gynecology, Fellow
  • Society of Gynecologic Oncologists
  • International Gynecologic Cancer Society