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Maria C.B. de Leon,

M.D.

Gynecologic Oncologist

4.9 (274 Ratings)
Biography photo
Location
Antelope Valley
44151 15th Street West
Lancaster, CA 93534
Specialties
Gynecologic Oncology
Surgery
Education
Medical school:

Degrees

  • 2008, M.D., University of California Los Angeles, Los Angeles, CA
  • 2003, B.S. in Biochemistry, University of California Davis, Davis, CA
  • 2000, A.S. in Biology, cum laude, Evergreen Valley College, San Jose, CA

Fellowship

  • 2012–2016, Gynecologic Oncology Fellowship, Indiana University, Indianapolis, IN

Residency

  • 2008–2012, Obstetrics and Gynecology Residency, Yale New Haven Hospital, New Haven, CT

Professional Experience

  • 2016–present, Assistant Clinical Professor, Division of Gynecologic Oncology, Department of Surgery, City of Hope, Duarte, CA
Academic Appointments
  • Assistant Clinical Professor, Division of Gynecologic Oncology, Department of Surgery
About Me

Maria C.B. de Leon, M.D., is an assistant clinical professor of gynecologic oncology in City of Hope’s® Department of Surgery. She sees patients at City of Hope’s clinics in Antelope Valley, Santa Clarita and Mission Hills community sites, ensuring that women diagnosed with cancer receive specialized cancer care closer to home. 

Dr. de Leon earned her bachelor’s degree in biochemistry at the University of California, Davis, then went on to receive her medical degree from the University of California, Los Angeles. She completed her residency in obstetrics and gynecology at Yale-New Haven Hospital in Connecticut, where she received recognition for excellence in laparoscopic surgery. Following her residency, she completed her fellowship in gynecologic oncology at Indiana University in Bloomington. 

In addition to her clinical work, Dr. de Leon is actively involved in several professional organizations, including serving on the Statistics Subcommittee of the Gynecologic Oncology Fellow Research Network and being a member of the Society of Gynecologic Oncology, the American Association of Gynecologic Laparoscopists and the American College of Obstetricians and Gynecologists. She has received several awards, including Indiana University’s Simon Cancer Travel Award. 

Fluent in Spanish, Tagalog, and Ilocano, Dr. de Leon is committed to delivering compassionate, care to the diverse communities she serves.

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.
May 26, 2025
"I wish Dr De Leon specialized in other area of medicine. She is amazing and I'd love to see her for everything."
May 26, 2025
5.0
"I had to call the after hours number when I was in the ER and Dr DeLeon not only answered but I also felt she was empathetic to my situation and very helpful with getting me the treatment I needed. She worked with the ER doctor and informed him of her recommend course of treatment. I am truly grateful for her compassion and professionalism."
May 13, 2025
5.0
"Dr Maria DeLeon is best. Caring, passionate, cares about her patients"
May 3, 2025
5.0
"Good"
May 3, 2025
5.0
"Great doctor, sees patients as a person, not like a patient"
May 1, 2025
4.9
"All the staff are very nice and helpful"
May 1, 2025
4.9
"Always a good visit"
Apr 30, 2025
5.0
"WHAT CAN I SAY DR. DELEON IS THE BEST OF THE BEST"
Apr 29, 2025
5.0
"Dr. DeLeon is such an amazing doctor!"
Apr 23, 2025
5.0
"Since day one back in 2020, she was very straight forward with me Answered all my worries & questions I feel that she cares for me and she wants the best of me"
Apr 23, 2025
5.0
"Excelente"
Apr 23, 2025
5.0
"Excelente"
Apr 23, 2025
5.0
"Excelente"
Feb 25, 2025
5.0
"The Staff and Administration are excellent"
Feb 25, 2025
5.0
"The BEST!!!!"
Feb 20, 2025
5.0
"Love Dr Maria De Leon she's the best oncologist"
Feb 20, 2025
5.0
"Have recommended this hospital to my friends who have had cancer like my best friend [...]"
Feb 10, 2025
5.0
"Very efficient"
Jan 29, 2025
4.7
"Bueno"
Jan 28, 2025
5.0
"Dr. DeLeon is an incredible doctor. She is professional, very knowledgeable and caring."
Jan 7, 2025
5.0
"Very Good"
Jan 7, 2025
5.0
"Very Good"
Jan 3, 2025
5.0
"Dr. De Leon is the best doctor I've ever been to and I wish more providers were as kind as efficient as she is."
Dec 31, 2024
5.0
"Good"
Dec 31, 2024
5.0
"Me gusta la atencion"
Dec 11, 2024
5.0
"The staff are a great workers , nice and helpful"
Dec 11, 2024
5.0
"Dr. De Leon is a great doctor, full of kindness and knowledge."
Nov 28, 2024
5.0
"Very down to earth connects with me as a patient I'm extremely satisfied"
Nov 12, 2024
5.0
"Great clinic"
Nov 12, 2024
5.0
"Awesome dr"
Nov 12, 2024
4.9
"Eexcellent"
Nov 12, 2024
4.9
"Eexcellent"
Nov 9, 2024
4.9
"The technical aspect of the connection was good, but there was no eye contact nor active listening on the part of the doctor."
Nov 9, 2024
4.9
"[...] She was extremely rushed and did not appear to be listening to my questions. She was looking at her computer and typing the whole time. Each answer contradicted the other and when I asked for clarification, she kept typing and appeared frustrated. [...] I believe she is a good doctor at heart, and that I got her on a really bad day. The rating I gave is purely based on my experience."
Nov 7, 2024
5.0
"I really appreciated that she explained everything she was doing and she listened to my questions."
Nov 5, 2024
5.0
"The doctor is very kind and intelligent. I trusted her completely."
Nov 2, 2024
5.0
"THE FIRST TIME I WENT THERE AND I HAD CANCER I WAS SO SCARED BUT THEY ALL TREATED ME SO KIND ,CARING IT WAS AWESOME."
Oct 20, 2024
5.0
"Wonderful provider, excellent doctor"
Oct 19, 2024
5.0
"She also discuss referral doctor that I saw"
Oct 17, 2024
5.0
"Felt like I always get the best care with her"
Oct 13, 2024
5.0
"Dr. DeLeon has always reviewed and answered my concerns clearly."
Oct 2, 2024
5.0
"Love Dr De Leon and the entire staff!"
Sep 24, 2024
5.0
"Dr. DeLeon is, by far, the BEST health care I've ever had in my 66 years. My only regret is that she can't be my provider for all my health care needs. I love her, and everyone I've ever encountered at City of Hope, to death. Youre lucky to have them all. I've already recommended several people to you who have all been equally as impressed."
Sep 20, 2024
5.0
"I love Dr De Leon"
Aug 23, 2024
5.0
"I believe COH is one of the best hospitals [...]"
Aug 23, 2024
5.0
"Dr de Leon is the kind of doctor you would want to provide care and treatment for you. I completely trust her expertise and her compassionate nature right from the first time I met her."
Aug 22, 2024
5.0
"Very pleasant experience [...]"
Aug 15, 2024
4.1
"The doctor was very pleasant and obviously knowledgeable, but she seemed a bit rushed."
Aug 14, 2024
4.1
"Dr. Very kind and courteous"
Aug 3, 2024
4.1
"Excellent service and I felt cared about"
Aug 3, 2024
5.0
"Very Professional!"
Aug 3, 2024
5.0
"Very Professional and always a very good listener and doctor."
Jul 21, 2024
5.0
"I wish the dr would have spent more ti.e with me, explaining issues that are not directly related to her specialty."
Jul 12, 2024
5.0
"Good"
Jul 12, 2024
5.0
"Good"