Biography


Dr. Marquez is a radiation oncologist and the medical director of the Stanford Cancer Center in South Bay. She has board certification in therapeutic radiology and completed fellowship training in the use of radioimmunotherapy and radiosensitizers.

Dr. Marquez educates future specialists in her position as a clinical professor in the Department of Radiation Oncology at Stanford University School of Medicine.

In her clinical practice, she specializes in breast cancer, but treats a broad spectrum of cancers including prostate, lung, colon, lymphoma, and brain tumors. For each patient, she develops a comprehensive, compassionate care plan customized to individual needs. Her goal is to deliver the most effective cancer treatment to help patients enjoy the best possible health and quality of life.

Dr. Marquez has conducted research and published numerous articles in peer-reviewed journals: Clinical Cancer Research, Annals of Surgical Oncology, the Journal of Women’s Health, and others. Topics include innovations in surgical decision-making, advanced treatment of prostate cancer, and the effectiveness of stereotactic body radiation therapy (SBRT) in treating larger brain tumors.

She also wrote the chapter on pediatric radiation therapy for the Textbook of Clinical Pediatrics.

She has made presentations to her peers at the annual meeting of the American Society for Therapeutic Radiology (ASTRO) and at the annual Radiation Oncology Conference. Topics include radiation therapy after a mastectomy and advanced management of cancer of the central nervous system

She received a grant to examine the recruitment and retention of minority patients in cancer research. The National Cancer Institute sponsored the study.

Dr. Marquez is a member of the American Society for Therapeutic Radiology, American College of Radiology (ACR), and Society for Neurologic Oncology (SNO). She is a Fellow of the American College of Radiology (FACR).

She participates on multiple committees in the Stanford School of Medicine Clinical Educator Program. She also serves as a radiation oncology expert on the Global Online Breast Tumor Board. This board is sponsored by Massachusetts General Hospital and meets monthly to provide real-time expert opinions for breast cancer cases from cancer centers across the world, including Brazil, Poland, and the Philippines.

Professional Summary


Education & Certifications
  • Internship: UCSF Dept of Internal Medicine (1988) CA
  • Board Certification, American Board of Radiology, Therapeutic Radiology (1992)
  • Fellowship, Stanford University, Department of Radiation Therapy, Radioimmunotherapy and Radiosensitizers (1993)
  • Residency, University of California, San Francisco School of Medicine, Radiation Oncology (1992)
  • Medical Degree, University of California, San Francisco School of Medicine (1987)
  • Residency: UCSF Radiation Oncology Residency (1992) CA

Publications

Practice Locations


Radiation Oncology Clinic in San Jose San Jose, CA
San Jose, CA

2589 Samaritan Drive

San Jose , CA 95124

(650) 498-6000

Make An Appointment More Clinic Information » Getting Here »

Breast Cancer Program in San Jose San Jose, CA
San Jose, CA

2589 Samaritan Drive

San Jose , CA 95124

(650) 498-6000

Make An Appointment More Clinic Information » Getting Here »

Cancer Center in South Bay San Jose, CA
San Jose, CA

2589 Samaritan Drive

San Jose , CA 95124

+1 (833) 444-7622

Make An Appointment More Clinic Information » Getting Here »

Patient Ratings

(100 Ratings)

Overall Rating
4.9/5

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4.9/5
Friendliness
Friendliness/courtesy of the care provider
4.9/5
Explanations
Explanations the care provider gave you about your problem or condition
5.0/5
Listens
Concern the care provider showed for your questions or worries
4.9/5
Care provider's efforts to include you in decisions about your care
Care provider's efforts to include you in decisions about your treatment
4.8/5
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The Patients Ratings and comments are gathered from our Patient Satisfaction Survey and displayed in their entirety.

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Patient Reviews

(171 reviews)

The best physician I’ve ever had!
Dr Carol is an excellent Doctor. She is very nice and professional
Dr Marquez is wonderful, nurses and assistance too.
Dr. Marquez is fantastic. Caring, patient, provides clear information, knowledgable, and interested in me as person as well as a patient. I am fortunate to be in her care.
Dr. Marquez was extremely thorough and took time to answer all my questions.
I have been seeing Dr. Marquez through a first breast cancer dx in 2018 and now through a recurrence. In both cases radiation was offered, discussed, and ultimately declined. In spite of hopefully never using her applied expertise, she has consistently been very supportive and a great part of my team, helping me better understand much more nuance and helping me think through my next steps for more informed decisions. She shows me imaging to give me a better sense of what's going on and answers all my questions. She offered assistance, her nurse Sal offered assistance, etc. I appreciate how she has shown interest in my case, and in me, always respectfully and warmly.
She was excellent! She explained about Radiological therapy and all of the side effect very clearly. I understood them well.
Excellent, Caring, knowledgeable!!Kudos to her!
She answer all my questions
She was caring and wonderful!
Very patient and all questions answered.
I love Dr Marquez. She keeps me in the loop.
My husband and I were both very impressed with Dr. Marquez. She was prepared, thoughtful, informative and she inspired our feeling of confidence in her.
Dr Marquez is amazing. My confidence in her did not waver even once during the 5 years I have been under her care.
Very knowledgeable and informative. Answered all my questions.
Same as what I wrote in response to last questions -- She is very informative, well-researched, answered all my questions, kind & caring. I did not feel rushed.
I would highly recommend Dr. Marquez to anyone- especially an anxious person. She is professional and provides information and resource information that is reassuring.
So far, I am very impressed with Dr. Marquez. Very professional, informative, personable and is careful to give me room to ask questions that may arise.
She’s a wonderful doctor and I was lucky to have been one of her patients.
Dr. Marquez is very thorough and answered all of my many questions. I have a better understanding of my treatment plan.
Great facility, professional and friendly staff, plenty of parking
Very professional, compassionate, and informative. I was extremely satisfied with the meeting today.
She is an amazing compassionate doctor. She makes you feel comfortable talking to her and she is a great listener.
This was my first meeting with Dr. Marquez. I prefer an in-person visit for the first meeting but Dr. Marquez put me at ease. She listened carefully and truly heard me. I am happy that Dr. Marquez is on my care team.
Excellent communicator. Instills great confidence as a doctor.
Carol is a great doctor. Fully prepared. She is complete. She listens and she is friendly! I love Dr. Marquez.
Dr Marques and her team are the best.
I am very pleased with the time I was afforded, Dr Marquez explained everything clearly, listened to my concerns and answered my many questions..
Dr Marquez and RN Salvador: Patiently explained my health situation and the treatment options. I fell good after this medical appointment. Thank you ver much!
She is the best doctor I have ever met. She has such care and compassion.
Dr marquez is fantastic
Total trust in her knowledge and see previous note!
Dr Marquez was all I could hope for in a treating physician. Her staff listened and cared.
Dr. Marquez is very professional, empathetic. Loved her!
I love Dr. Marquez. She’s extremely caring, knowledgeable and always goes above and beyond with her care. Thank you, Dr. Marquez for your attentiveness and human touch.
Online check in is so efficient. My doctors are so caring and really listen to me!
Dr. Marques is awesome!
Feel very confident with her overall visits. Will miss my visits with Dr. Marques. It is 5 years already since my last breast cancer diagnosis. I will miss her!
Thank you Dr. Marquez for answering all my questions and concerns.
I am thankful for the quality of care provided. Dr. Márquez definitely had my best interest at heart and she helped me understand treatment options much better. Thank you, Dr. Márquez!
She is a wonderful caring physician and an expert in her field.
Comfortable
Excellent communicator.
Dr. Marquez is a wonderful physician. I am so grateful to be under her care. She is very caring for the patient and knowledgeable in her field. She gives wonderful explanations and is very responsive to patients needs. She is an expert in her field.
Very good doctor. She answered all my questions and was very thorough.
Everyone very caring, professional but not "stuffy", make you feel part of family
First introduction meeting Dr. Marquez was well prepared having reviewed my prior medical information. This put me at ease. She answered all my questions and quite frankly gave me more hope. I really appreciate her communications with her staff also on the video visit. I was not as anxious after meeting today.
Very personable and easy to talk with.
Dr Marquez explained options very clearly and answered my questions thoroughly!
Dr. Marquez is amazing. She communicates clearly and listens. She discuss options in detail and helps me feel comfortable.
I appreciate doctor Márque talk to me very clearly and honestly about my cancer and her team was helpful nurses and Cain ladies but doctor Marquez was so clear with me and this is the way I like to be treated and respectful person with me so I know when and how to be prepared for my love ones and the future!! thank you 🙠to old the team and also Dr Karen and her team they treat me as a person and paciente very lovely 🥰!!
She was very kind and explained everything very well. She made me feel a lot better about my diagnosis and procedure.
I am so thankful to be treated by Stanford Health Care.
Easy to talk to, I was not rushed . She was very encouraging !
Dr. Marquez is always very friendly, encouraging and knowledgeable about my story, my care and my future treatments. I love being her patient.
Informative, easy to talk to, thorough
She is so caring
Dr. Marquez did a very good overall job. She was easy to speak with and answered all my questions.
Dr. Marquez answered all my questiones. I am so grateful to her care. Thank you so much to Dr. Marquez and her staff!
Dr. Marquez is terrific
I love Dr. Marquez! She is very patient, friendly & a very nice person. I am glad she is my doctor.
She was able to explain everything very well, knowledgeable and doesn’t rush the patient.
Always treated so well
Dr. Marques is wonderful, and her nurse assistance was too.
Dr. Marquez was great! I really liked that she was on my wavelength and that she took the time to explain everything clearly (especially to discuss the results of research studies, since I'm very big on research and data). I'm looking forward to continuing with her in a few months.
I like Carol Marquez’s after-visit summaries. They are detailed and clear and easy to understand. I would like to thank her for taking the time to clearly explain everything for me.
I have visited Dr. Marquez before. I am confident she is a very good doctor.
Very professional, very competent and explained things well.
Dr. Marquez, you are awesome!! Thank you for all your expertise that you shared with me, it was very helpful.
Dr. Marquez and her team care about their patients.
Please note my comments in prior question. Dr. Marquez was very professional. and Informative. My first appointment with her was excellent.
Dr. Marquez explains about my case, treatment, and options very well and answered my questions very clearly. She was also calm, and easy to talk to. I really recommend her to other patients.
Always the best
Dr. Carol is very nice and friendly, willing to help us.
Dr. Marquez and her nurse coordinator were absolutely helpful and informative on what I am to expect and the time frames . It was good to meet such a wonderful and calming team . I am so grateful for that !
Thank you for given me and my daughters. I felt very comfortable at all times.
She was kind, patient and answered my questions. I have only seen her once but chose to continue my radiation at this facility as she was highly recommended.
Dr Marquez is an excellent listener and communicator!
I really appreciate both Dr. Martha Man and Dr. Madeleine Marquez. They have been great.
I love Dr.(Carol) Marquez
Very knowledgeable doctor, great experience!
Dr. Marquez is outstanding! I highly recommend her.
Dr. Marques is awesome, I was lucky to be treated by her! Very knowledgeable, supporting, treats with empathy and kindness.
She is fabulous. Dr. Marquez is wise, kind, caring & brilliant doctor!
Dr Marquez was my rock during radiation treatment and I was extremely grateful to have her on my team. She is an amazing person and definitely makes you feel like you have an Ali during the process.
Dr. Marquez is phenomenal! I trust her medical opinions. She is a lovely, kind person.
Dr Marquez was so informative and clear about the process I am facing going forward I feel very positive about starting treatment with her and her team
I love Dr. Marquez's calm, common-sense approach in the way she provides care.
Dr. Marquez brings sunshine upon entering exam room. So awesome!
Dr. Marquez is always upbeat and has a smile on her face.
Dr. Marquez was efficient, helpful, & caring. I feel confident with her.
Dr. Marquez makes me feel like I have her full attention. Great listener, addresses my concerns, I trust her completely with my care. I drive about 1 hour each way & could transfer to closer provider, but will keep under Dr. Marquez care.
Dr. Marquez is personable. She listens and seems to be concerned & thorough.
Dr. Marquez is very down to earth attitude & easily approachable.
Dr. Marquez she is great.
I cannot begin to explain the care & concern I was shown!
Dr. Marquez is fabulous - I highly recommend her.
Carol is wonderful - all staff & services highly professional-
At first I was told I wouldn't have a response to my mammograms til Monday; however Dr. Marquez called me on Friday to let me know it was benign so I could enjoy the weekend.
Dr. Marquez is beyond wonderful!
Dr. Marquez is very kind and seems like a friend when she is talking to one and one feels very good.
Dr. Marquez is beyond amazing. She took the time to answer my questions and did not make me feel rushed. She comforted and reassured me.
Excellent!!
I really appreciate the expertise and professionalism of Dr. Marquez.
Dr. Marquez is awesome! Asking questions, listening, remembers even details from previous conversations. I felt personal connection to this doctor, like a family member.
Dr. Marquez continues to be wonderful and considerate of all my concerns.
I really like Dr. Marquez.
Dr. Marquez is amazing. She inspires great confidence & trust! I travel an hour each way for visits (instead of closer Stanford drs.) because I trust her skills & she makes me feel very "heard" when I discuss med. issues. She is great! 3. 6!
I can't say enough about Dr. Marquez. She made me feel like I was her only patient. Such great care! Thank you, Dr. Marquez!
I have worked with Dr. Marquez for 4 yrs. now and she is wonderful! She seems to really care about her patients and shows interest in my concerns.
Dr. Marquez is fantastic. Her care gave me comfort and I felt like I was her only patient.
Dr. Marquez was very thorough in her explanation of treatment plan. She was easy to talk to and took time to listen to my concerns and answered my questions. I look forward to working with her.
Always recommend Dr. Marquez.
Very lucky to have Dr. Carol Marquez & Dr. Thomas Chen.
Dr. Marquez is a wonderful doctor.
Very compassionate, thorough, FRIENDLY - a human being not a stressed robot. LOVE HER!
I cannot think of a single negative experience. Please don't change anything.
I would HIGHLY recommend Dr. Marquez!
Dr. Marquez is caring, kind and was prepared for the visit.
I was EXTREMELY impressed by Dr. Marquez with the time, care, concern and expertise she gave me.
Dr. Marquez is everything her reviews say she is - & more. She made me feel that what I had to say was important & as an uneducated lay person - what I had to ask or discuss was important. There was never a "rush" feeling. Being dx'd with CA is frightening - & Dr. M. knew exactly what I feared most - and easily conveyed that msg. to me.
very clear communication.
Dr. Marquez is fabulous!
Dr. Marquez is wonderful - her kindness & professionalism truly helped me so much through my cancer ordeal!! Love her!
Dr. Marquez was really good & spent time explaining things to us & answering our questions.
Dr. Marquez very much appreciated for recognizing I was well-informed coming into my visits with her. She thus shared a medical journal article with me. Thank you, Dr. Marquez!
The dr. was spectacular. Carried on an intelligent conversation.
Super.
Dr. Carol Marquez is consistently extremely pleasant and friendly and very easy to talk to as she was on this visit.
Dr. Marquez was very kind - listened carefully & thoughtfully.
Dr. Carol Marquez is the best most wonderful, and well informed doctor. I just love her!!
Wonderful experience.
I always feel better after a conversation with Dr. Marquez!
Dr. Marquez is very compassionate. I never feel rushed, always get complete information & questions answered. It's a drive for me (1+ hrs.) but well worth it for a trusted physician.
Dr. Marquez kept me sane during my journey and was the one I knew was available and would help me. She is amazing.
Very good care!
Dr. Marquez is empathetic, a great listener, easy to talk to, positive, and very caring. It is always a pleasure to have an appointment with her. She also delivers challenging news very professionally.
Dr. Marquez is an outstanding practitioner & excellent communicator.
Dr. Marquez & Sal - Five stars!!
Only place where doctors are on time, very engaged, focused on patient, and for feedback.
I have the highest regard for Dr. Marquez.
Dr. Marquez was excellent in explaining results and next steps with me.
I absolutely love Dr. Marquez's professionalism and compassion.
very good
Dr. Marquez communicated very well. Excellent doctor.
Dr. Carol Marquez is very caring and pleasant. She has given me confidence in dealing with my illness and expressed interest in any concerns that I might have regarding medical issues. She is wonderful!
Dr. Marquez was excellent! She knew my full story and what led me to her expertise. She is amazing!
All experiences with Dr. Marquez have been excellent. She has been a tremendous support throughout my treatment. So pleasant and professional.
Dr. Marquez is the first doctor in 10 years that did not look at a computer screen while talking to me. I had forgotten how good it feels to have full attention of the doctor. She brought in an assistant to record the visit.
Dr. Marquez is an excellent provider! She is warm, friendly, confident, and explained everything in detail. Wonderful visit.
dr marquez is very easy to talk to. she makes a difficult process as good as it can be. i have great confidence in her care.
Dr. Marquez is always upbeat. She answered all my questions and gave me valuable information on some of my continuing symptoms I didn't know that my sinus discharge andt thick sputum would continue for several more months and was not a symptom of infection or illness; this was a relief to know.
Dr. Marquez is very easy to talk to. She is great! I would highly recommend her to my friends and family.
Some people are born to be doctors, with a kind heart & the intelligence to be a great one! Dr. Marquez is one of them. She was not only informative, she was kind & patient explaining my diagnosis even though I had chosen to go with a treatment option not involving her are of expertise.
Dr. Marquez was warm-hearted, patient, comprehensive and clear, and immensely competent. I could not recommend her more highly.
Excellent doctor explanation of radiology procedure.
Dr. Marquez provided wonderful care. She is consistently warm & friendly, yet professional. Highly recommend her!
Am very comfortable with the Dr. She is pleasant, personal, and very competent!
good
Dr. Marquez & all of her staff showed great professional caring and compassion. You have a wonderful team!
Doctor very friendly and cordial.
Dr. Marquez always provides info and never gives any indication if she need to get to next patient. She treats us as if we are the only people in the building!
Dr. Marquez was very attentive, knowledgeable, and caring. She is one of the best!!! I highly recommend her to anyone who needs her expertise.
Dr. Marquez is a gem! Her personality is wonderful and her genuine concern.
Dr. Marquez was interested, authoritative, professional and good humored - Just what I needed.
A very good experience.
Top start doctor!
Very pleasant visit with Dr. Marquez? She was very friendly, answered all my questions, and took her time with me.
Dr. Marquez is very personable and my confidence in her is extremely strong.
Dr. Marquez was prepared for my visit. She reviewed my condition verbally in detail. I felt very good about the visit. She couples humor w/seriousness.
Dr. Marquez is absolutely fabulous in her care, knowledgeable, and attention to questions or concerns!!

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