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Ernest S. Han,

M.D., Ph.D.

Gynecologic Oncologist

4.9 (193 Ratings)
Biography photo
Location
City of Hope Duarte
1500 East Duarte Road
Duarte, CA 91010
Specialties
Gynecologic Oncology
Surgery
Education
Medical school:

Board Certifications

  • 2004–2024, Diplomate of the American Board of Obstetrics and Gynecology

Degrees

  • 1994–2000, University of Texas Medical Branch, Galveston, M.D.
  • 1992–2000, University of Texas Medical Branch, Galveston, Ph.D., Cell Physiology and Molecular Biophysics
  • 1988–1992, University of California Berkeley, Berkeley, CA, B.A., Molecular and Cellular Biology

Fellowship

  • 2004–present, University of California Irvine, Orange, CA, Fellowship, Gynecologic Oncology

Residency

  • 2000–2004, Brown University, Women and Infants Hospital, Providence, RI, Residency, Obstetrics and Gynecology

Professional Experience

  • 2020–Present Program Director, ACGME Gynecologic Oncology Fellowship Program, City of Hope, Duarte, CA
  • 2021–present, Associate Professor, Department of Surgery, Division of Gynecologic Oncology, City of Hope, Duarte, CA
  • 2021–present, Chief, Division of Gynecologic Oncology, Department of Surgery, City of Hope, Duarte, CA
Academic Appointments
  • Associate Professor and Chief, Division of Gynecologic Oncology, Department of Surgery
About Me

Ernest Han, M.D., Ph.D., is a gynecologic cancers specialist at City of Hope® Cancer Center Duarte, where he serves as chief of the Division of Gynecologic Oncology. As both a doctor and a researcher, Dr. Han is deeply committed to offering the most advanced and effective surgical care for women with a wide range of cancers, whether through traditional surgery or minimally invasive techniques. 

A major focus of Dr. Han’s work is the use of special imaging tools during cancer surgery to enhance accuracy and improve the chances of removing all signs of cancer in a single procedure. His research also looks at ways to improve the overall surgical experience, with the goal of faster recovery and better long-term outcomes. 

Dr. Han also plays a key role in shaping the future of gynecologic cancer care by directing the gynecologic oncology fellowship program, which is accredited by the Council for Graduate Medical Education. He is passionate about mentoring new doctors and making sure they are well-prepared to deliver skilled and compassionate care to women facing gynecologic cancers.

Patient reviews
The patient ratings and comments on this page are obtained from an external Press Ganey® outpatient survey provided to all eligible City of Hope patients within one to two weeks of their treatment occurrence. Raw data from the answers to the survey questions about our physicians are calculated by Press Ganey into a one- to five- star rating. In the spirit of transparency, all patient comments are posted as written by the patient, whether they are positive or negative. We only exclude comments if they are deemed to be slanderous or libelous, contain profanity or vulgar language, or do not relate to the patient's experience with the doctor involved. As a result, the comments are the views and opinions of the patients surveyed and are not endorsed by, and may not necessarily reflect the opinion of, City of Hope.
Jul 28, 2026
5.0
"I have and will continue to refer patients to this facility as well as the doctor. Amazing place for treatment and health care"
Jul 25, 2026
5.0
"Very Good"
Jul 23, 2026
5.0
"Good"
Jul 18, 2026
5.0
"Dr. Han is wonderful. I feel extremely blessed to have him as my oncologist. He is caring, professional, kind, patient... All the things one would hope for in a medical provider - especially when dealing with a cancer diagnosis."
Jul 17, 2026
5.0
"Dr Han is an excellent doctor!!"
Jul 17, 2026
5.0
"Fantastic doctor and staff!!"
Jul 9, 2026
5.0
"Doctor Ernest Han is an excellent gynecologist, I am grateful that he is my doctor. He is an excellent doctor specializing in oncology, he answers all my questions and I feel confident in him for my treatment."
Jun 19, 2026
5.0
"Dr. Han is a very respectful person, who does not ignore anything, explains everything very well and clarifies all doubts"
Jun 13, 2026
5.0
"Dr Han is so caring, so informed, so thorough. Best doctor I've ever had!"
May 23, 2026
5.0
"He explained to me very clearly the process of my treatment and answered all my doubts with great passion and clarity"
May 18, 2026
5.0
"Very good."
May 18, 2026
5.0
"Very good"
May 18, 2026
5.0
"Very good"
May 16, 2026
5.0
"Always recommend to everyone"
May 14, 2026
5.0
"Stellar Doctor. I'm grateful"
May 11, 2026
5.0
"Dr. Han is very compassionate, understanding and professional. He really does take the time to listen and explain everything clearly.""
Apr 24, 2026
5.0
"Always highly recommended."
Apr 24, 2026
5.0
"Dr.Ernest Han is the best."
Mar 13, 2026
5.0
"Although I wish I didn't have a cancer diagnosis, I am very thankful and grateful for the care I have received at the City of Hope. I have met very caring and expert doctors from [...], [...] and Dr. Ernest Han. I couldn't have asked for more."
Mar 12, 2026
5.0
"Dr. Han is very knowledgeable and has an amazing gentleness that put me at ease with my findings."
Mar 12, 2026
5.0
"Excellent"
Feb 18, 2026
5.0
"Dr Han is very caring to my health always takes time out to give me best health information"
Jan 28, 2026
5.0
"I am so thankful to have Dr Han oversee my care , surgery etc"
Jan 22, 2026
5.0
"Dr. Ernest Han Is an exceptional doctor! Super knowledgeable, explained everything in detail, and genuinely cared about my concerns. Left feeling heard and confident in the plan. Highly recommend!"
Jan 22, 2026
5.0
"I found the staff to be exceptionally caring and helpful, serving customers and patients with warm smiles."
Nov 20, 2025
1.6
"Dr. Han cut me off while I tried to express my concerns. [...]"
Nov 14, 2025
5.0
"Best, most thoughtful, helpful, kind, [...], patient and knowledgeable provider."
Oct 24, 2025
5.0
"Everyone at City of Hope is Amazing!!!!!!!!!!!!!!"
Oct 24, 2025
5.0
"Care Provider was a clear as he could for my husband and I considering my prognosis."
Oct 20, 2025
5.0
"Dr. Ernest Han is amazing. He explained everything well"
Oct 16, 2025
5.0
"Dr was very kind, trustworthy with clear and detail explanation of the treatment options and outcomes!"
Sep 28, 2025
5.0
"Thank you to my two attending physicians, they are very caring, and seeing their smiles makes me feel warm..."
Sep 27, 2025
4.7
"This was my first visit with Dr. Han since my previous oncologist left COH. He was friendly, informative and professional ."