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Kelly Yap,

M.D.

Medical Oncologist and Hematologist

5 (279 Ratings)
Biography photo
Location
City of Hope Arcadia
301 West Huntington Drive, Suite 400
Arcadia, CA 91007
City of Hope South Pasadena
209 Fair Oaks Avenue
South Pasadena, CA 91030
Specialties
Hematologic Oncology
Medical Oncology
Education
Medical school:
Board Certifications
  • 2016, American Board of Internal Medicine, Medical Oncology

  • 2016, American Board of Internal Medicine, Hematology

  • 2013, American Board of Internal Medicine, Internal Medicine

Degrees
  • 2006, M.B., B. Ch., B.A.O. with honors, Queen’s University of Belfast, Northern Ireland, UK

Fellowship
  • 2013-2016, Fellowship, Hematology/Oncology, LAC/USC Medical Center, Los Angeles, California

Residency
  • 2012-2013, Chief Resident, Internal Medicine, York Hospital, York, Pennsylvania

  • 2010-2013, Residency, Internal Medicine, York Hospital, York, Pennsylvania

Professional Experience
  • 2019-present, Assistant Clinical Professor, Department of Medical Oncology and Therapeutics Research, City of Hope, South Pasadena and Arcadia, California

  • 2016-2018, Assistant Professor of Clinical Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California

Residency:

2012-2013, Chief Resident, Internal Medicine, York Hospital, York, Pennsylvania

2010-2013, Residency, Internal Medicine, York Hospital, York, Pennsylvania

Academic Appointments
  • Assistant Clinical Professor, Department of Medical Oncology & Therapeutics Research
About Me

“It’s truly a privilege to walk alongside patients on their path to healing,” says Kelly Yap, M.D., a medical oncologist and hematologist serving patients at City of Hope® locations in Arcadia and South Pasadena. 

Dr. Yap is deeply committed to staying at the forefront of cancer care in the rapidly evolving field of medical oncology. She is enthusiastic about offering the latest personalized treatments, always aiming to find the right balance between effectiveness and quality of life. Building strong, supportive relationships with her patients is at the heart of her approach, as she helps them navigate the complexity of cancer care. 

Dr. Yap earned her medical degree from Queen’s University of Belfast. She completed her Internal Medicine residency at York Hospital in Pennsylvania, where she served as chief resident. She then completed a fellowship in hematology and oncology at LAC+USC Medical Center in Southern California. 

Before joining City of Hope, Dr. Yap was an assistant professor at Keck School of Medicine USC. She is board-certified in Medical Oncology, Hematology and Internal Medicine.

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.
Apr 25, 2026
5.0
"Dr Yap is observant, knows her field and is able to listen extremely well. She is also excellent at figuring out issues and trying to find solutions that could solve them. I am so glad she is my oncologist."
Apr 22, 2026
5.0
"Dr. Yap is an excellent physician. She is very thorough and listens closely to all questions and concerns."
Apr 20, 2026
5.0
"From Day one, I have been very satisfied and happy with COH . All the people , from the Doctors, to all the staff, and all the office personnel, have always been very courteous and caring for my wellbeing. Always felt the loving care for my personal situation. From the first appoint, through all the treatments, to now, all the follow-up's , I am very blessed to have such a wonderful Medical Facility, taking care of me. Thank you for being there, and may God Continue to Bless your service to all that are in need. [...]"
Apr 15, 2026
5.0
"It couldn't be better"
Mar 29, 2026
5.0
"Dr. Yap is excellent. She listens carefully and never dismisses any of my concerns. She is serious, and she also has compassion and a sense of humor. She appears to be on top of the latest research and medical developments/advances, and I trust her judgement."
Mar 7, 2026
5.0
"Doctor Yap is so caring and explains everything so well I feel that I have a pretty good idea what's going on."
Mar 5, 2026
5.0
"Good"
Mar 5, 2026
5.0
"Good"
Feb 11, 2026
5.0
"I have already recommended her!I took in a package of supplements I received in the mail as part of an unrelated health program, and Dr Yap took the time to thoroughly review the contents and provided information on how to adjust my current supplement intake and confirm no adverse interaction with current prescription. She LISTENS to every health goal I share and it's appreciated!"
Feb 8, 2026
5.0
"The service provider is friendly, patient and attentive in consultations and consultations, very good"
Jan 29, 2026
5.0
"Dr. Yap is an amazing Dr who truly cares about her patients she takes her time to explain everything and makes sure you understand"
Jan 22, 2026
5.0
"I really like Dr. Yap"
Jan 18, 2026
5.0
"I appreciate the excellent care I have received at City of Hope."
Jan 18, 2026
5.0
"I survived cancer 6 years ago. Dr. Yap's excellant care helped immensely. I am blessed to have her as my oncologist. City of Hope is the best! Thank you."
Jan 13, 2026
5.0
"I am so thankful for Dr. Yap. She is the best doctor EVER!"
Jan 9, 2026
5.0
"I would highly recommend Dr. Kelly Yap"
Dec 5, 2025
5.0
"I feel very fortunate that Dr Yap is my oncologist. She thoughtfully answers my questions and offers treatment options. Her knowledge of statics and outcomes Is particularly helpful. I also feel that she cares about me."
Oct 23, 2025
5.0
"Good"
Oct 23, 2025
5.0
"Good"
Oct 17, 2025
4.7
"It was refreshing to hear from a doctor that I didn't have to take any drugs after my mastectomy with immediate reconstruction. I was quite relieved, as I had anticipated taking aromatase inhibitors for 5 years, and was concerned about my quality of life on such drugs. I was thrilled to hear these drugs were unnecessary for me. Never have I ever been so happy to hear a doctor tell me such good news. Thank you Dr. Kelly Yap, and thank you City of Hope!"
Oct 14, 2025
5.0
"Dr. Kelly Yap is an impressive doctor."
Oct 11, 2025
4.7
"Enjoyed my visit with Dr Yap"
Oct 11, 2025
5.0
"Dr. Yap is an excellent doctor. She exhibits sincere compassion for my health. I'm lucky to have her as my doctor."
Sep 28, 2025
5.0
"There are not enough words to say how positive an experience it is whenever I'm at COH. Thank you to all!"
Sep 19, 2025
5.0
"She has had to take me off medication I liked. She relialized the cancer was growing. She is listening to me and had me take an MRI and a Pet Scan."
Sep 3, 2025
5.0
"Dr Yap is the BEST physician! She is very caring for my health, very professional and she always answered all my questions. I highly recommend her to all cancer patients. I will giver her a10 stars!"
Aug 26, 2025
5.0
"[...] Very satisfied."
Aug 7, 2025
5.0
"Good experience with the care and compassion of the professionals at COH, thank you."
Aug 4, 2025
5.0
"A very satisfying and enjoyable experience every time."
Aug 4, 2025
5.0
"Friendly attitude, patient, attentive, very good"
Aug 4, 2025
5.0
"Thank you to all the staff for providing us with such excellent service, everyone has worked hard, very grateful"
Aug 2, 2025
5.0
"Dr. Yap is an excellent physician. She answered all my questions and explained the situation very clearly. She is very convincing and I respect her opinions."
Jul 4, 2025
5.0
"Team work is the best"
Jul 4, 2025
5.0
"Good doctors, good nurses, good hospital!"
Jun 24, 2025
5.0
"Dr. Yap makes me feel so comfortable."