Skip to Main Content

Dr. John W. Park is an oncologist who specializes in breast cancer treatment and research.

In his laboratory, Park works to develop novel technologies for studying and treating cancer. His research includes investigating new forms of immunotherapy such as immunoliposomes (antibodies paired with vesicles similar to human cell membranes) and vaccines that target cancer cells. He also conducts clinical trials of new cancer treatments.

Park has been a visiting scientist at Genentech, where he performed research on HER2/neu, a protein produced in excessive amounts by some breast cancer cells, and Herceptin, a new treatment that acts as an antibody to HER2/neu.

  • Board Certifications

    American Board of Internal Medicine, Medical Oncology, 1993

    American Board of Internal Medicine, Internal Medicine, 1989

  • Fellowships

    UCSF, Hematology - Oncology, 1992

  • Residencies

    University of California, Los Angeles David Geffen School of Medicine, Internal Medicine, 1989

  • Internship

    University of California, Los Angeles David Geffen School of Medicine, Internal Medicine, 1987

  • Education

    Stanford University School of Medicine, 1986

  • Languages

    English

Where I see patients (1)

    My reviews

    4.9

    Overall Experience
    295 Ratings
    About our process
    Mar 22, 2025
    Dr Park is so thoughtful and informative regarding his responses. He also has a fun sense of humor. I enjoy these clinic visits, even when dealing with clinical issues. He is so evidence based in his care, it makes me certain that I am getting the best cate and guidance possible.
    Mar 21, 2025
    Dr John Park is incredible and I am so lucky to have him as my Oncologist!! His staff is also amazing and responds very quickly whether there be a call or through the MyChart app!! Always very friendly and thorough!
    Mar 19, 2025
    Very satisfied with the work done by Dr Park and the interest in helping me to get the best treatment possible as disease requires. Definitely Dr Park will be recommended as the best Oncologist specialist.
    Mar 19, 2025
    The doctor was very helpful from the question I asked him about my health.
    Mar 06, 2025
    I feel very fortunate to be cared for by Dr Park.
    Mar 06, 2025
    Grateful Dr Park is on my team.
    Feb 28, 2025
    Dr John Park is absolutely amazing!! I initially called him for a second Opinion for breast cancer, diagnosis, and treatment plan. He was absolutely amazing and switched to have him as my primary oncologist. He is well-versed in cancer Diagnosis and treatment. Definitely in the forefront of technology which I greatly appreciate. I am so lucky I was connected to him!!! :)
    Feb 13, 2025
    Excellent
    Jan 16, 2025
    I have enjoyed working with Dr. Park since the first time I met him. He has always given me great confidence that he knows what he is talking about, forwards and backwards, and I feel like he truly cares about me and about each and every one of his patients, and will always do whatever he believes is the absolute best thing for me & that he would never stear me in the wrong direction. Sometimes he can come off as a bit scattered, but I'm sure that's just because he has so much going on and believe that this is a characteristic that a lot of extremely intelligent people share. Dr. Park is a great doctor and I believe that it is because of him and the rest of my care team at UCSF that I'm still alive today.
    Dec 13, 2024
    Dr Park is terrific!
    Dec 06, 2024
    I know I have received the most accurate and compassionate information which I need to make decisions. This is a great way to deal with my health care. Many thanks!
    Nov 28, 2024
    Dr Park is clear, patient, encouraging, and inspires confidence.
    Oct 23, 2024
    My high esteem for UCSF has increased even higher. I had a supurbly qualified physician who, not only gave me reasoned and sound judgements, but corrected an error made by my local hospital. I am so comforted by my zoom visit that will help me make a more reasoned decision about future health care. Many thanks for your quality standards!
    Oct 09, 2024
    Dr Park is a very responsible and experienced oncology doctor
    Oct 04, 2024
    Dr Park is a blessing to me as specialist oncologist. As well as a person sensitive and caring physician.
    Oct 03, 2024
    Dr Park is kind, patient, and very clear.
    Oct 02, 2024
    Very good visit.
    Sep 04, 2024
    Dr Park is an excellent oncologist worthy of his specialty and trust to refer him to others. So grateful for having him as my oncologist.
    Aug 28, 2024
    Dr Park was great
    Aug 23, 2024
    Very good
    Aug 21, 2024
    Dr Park is very easy to talk to: straightforward and reassuring.
    Aug 14, 2024
    Dr. Park is very thorough and provides clear answers to any questions I raise.
    Aug 03, 2024
    Dr Park is clear, patient, personable, and inspires confidence.
    Jul 24, 2024
    In all the situations above the Care provider showed concern, listened, explained when I had questions and explained the importance and process going forward.Experience was very good
    Jul 11, 2024
    Great care. Thank you
    Jul 10, 2024
    Dr. Park is very compassionate and explains well to patient. I have no hesitation referring him to a friend or family member.
    Jul 06, 2024
    I always enjoy talking with Dr. Park. He really cares
    Jun 26, 2024
    By far the best doctor EVER
    Jun 19, 2024
    I often recommend Dr. Park.
    Jun 13, 2024
    Extremely informative and answered all my questions in a way my husband and I could understand.
    Jun 12, 2024
    This was an appointment for a second opinion on my treatment plan. Dr. Park was knowledgeable and helpful providing potential other options that had not been provided by my doctor and providing a more positive opinion about the treatment to date. He answered all of my questions and was very helpful.
    May 23, 2024
    Good
    May 07, 2024
    Cheerful, upbeat, honest
    May 04, 2024
    Dr Park is wonderful! He respects my knowledge and we have positive discussions about treatment and options. He has great concern for me and my husband.
    May 02, 2024
    Very grateful to have Dr Park as my oncologist. His knowledge, experience and wisdom is very valuable and appreciated.
    Apr 29, 2024
    My oncologist referred me to Dr. John Parks to answer any questions I may have about all of the aspects of our chemo treatment plan. Dr. Parks was extremely knowledgeable and put me at ease about my condition and the treatment plan going forward. He is a wonderful doctor and I highly recommend him.
    Apr 19, 2024
    I had an excellent experience.
    Apr 03, 2024
    Dr. Park is exceptional!
    Mar 31, 2024
    Dr Park is outstanding in his knowledge, communication, and compassion for his patients
    Nov 25, 2023
    Always seem to wait a half hour after appt time to for dr to come into exam room
    Oct 30, 2023
    Responds quickly and provides detailed explanations to assist with understanding
    Oct 11, 2023
    Excellent care provider
    Oct 04, 2023
    Dr Park is a very good & responsible doctor, he listened & explained to me with detail info.
    Sep 26, 2023
    Dr. Park does a great job of listening and then addressing the issue. He is friendly and very easy to talk to.
    Sep 21, 2023
    Definitely Dr Park is one of best knowledgeable oncologist with experience in the medical field.
    Sep 21, 2023
    Dr. Park has been fabulous throughout my treatment plan. I'm so appreciative of his vast knowledge, expertise, and caring demeanour.
    Sep 15, 2023
    Dr Park was very patient and provided pertinent information about my case. Excellent
    Sep 07, 2023
    He always listens and answers my questions appropriately. I always leave our meetings feeling better about my condition.
    Aug 30, 2023
    Dr Park is as much teacher as clinician. I know just enough to have tons of questions. Dr. Park inspires confidence, helps you understand what is happening and what your options are. He really listens.
    Aug 30, 2023
    Dr Park listened in my concerns and was very helpful in discussing optional treatments. He took his time with me & answered all my questions. Excellent, caring doctor.
    Aug 03, 2023
    Dr. Park has a relaxed demeanor which puts patients at ease - at least me,
    Jul 21, 2023
    Dr. Park has excellent knowledge about breast cancer and he takes time to explain In a detailed fashion what my options are for future treatments.
    Jun 10, 2023
    I've already recommended this care provider to others. He understood my desire to be able to continue to perform in coral concerts. He even knew the concert piece I just performed in before I started my cancer meds
    Jun 07, 2023
    Dr Park is excellent and I have referred him to others.
    May 31, 2023
    Dr John Park is great!!

    Share