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Matthew Genyeh Mei,

M.D.

Hematologist-Oncologist

4.9 (113 Ratings)
Biography photo
Location
City of Hope Comprehensive Cancer Center - Duarte
1500 East Duarte Road
Duarte, CA 91010
Specialties
Hematologic Oncology
Education
Medical school:

2007, M.D., Case Western Reserve University, Cleveland, OH

Residency:

2007–2010, Internal medicine resident, University of California San Francisco, San Francisco, CA

Fellowship:

2011–2014, Fellow, Hematology and Medical Oncology, Harbor-UCLA / City of Hope, Los Angeles, CA

Academic Appointments
  • Associate Professor, Division of Lymphoma, Department of Hematology & Hematopoietic Cell Transplantation
  • Program Director, Hematology and Medical Oncology Fellowship Program
Certifications

2014, Hematology

2014, Medical Oncology

2010, Board Certification, American Board of Internal Medicine

2009, Drug Enforcement Agency Certificate

About Me

Matthew G. Mei, M.D., is an Associate Professor in the Department of Hematology & Hematopoietic Cell Transplantation at City of Hope® Cancer Center Duarte, where he provides compassionate, individualized care for patients with lymphoma and other blood disorders. He also specializes in stem cell transplantation and cellular immunotherapy, using leading-edge treatments to improve outcomes and quality of life. 

Dr. Mei earned his medical degree from Case Western Reserve University in Cleveland, Ohio, followed by a residency at the University of California San Francisco. He then trained in hematology-oncology at City of Hope. 

Known for building strong relationships with his patients, Dr. Mei works closely with them and their loved ones to help navigate their cancer treatment journey. He is also active in the research lab and leads clinical trials focused on advancing therapies for lymphoma and transplant medicine. In addition to his clinical responsibilities, he serves as program director for City of Hope’s hematology/oncology fellowship, helping train the next generation of blood cancers specialists.

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.
Mar 5, 2026
5.0
"I've always had very good experiences at City of Hope. I think it is an excellent medical care facility!"
Mar 5, 2026
5.0
"Dr Mei helped me feel more confident about the medicine I'm taking and the possibility of continuing it for the long term."
Mar 3, 2026
5.0
"The best doctor ever."
Feb 28, 2026
5.0
"A +"
Feb 28, 2026
5.0
"Dr Mei is amazing. Knowledgeable, professional, patient, personable, respectful, and caring!"
Feb 19, 2026
5.0
"Excellent care by Dr Mei"
Feb 5, 2026
5.0
"Dr Mei is such a wonderful and caring provider. He is not only exceptionally knowledgeable and skilled, but also clearly genuinely cares about patients. He explained everything so thoroughly and really took the time to make sure all my questions were answered. He also gave such in-depth and thoughtful consideration to treatment approach and the different options- particularly focusing those options In relation to my specific health history and situation. I felt so comfortable with his recommendations and trust in his care completely. I feel so very grateful and blessed to be in the care of Dr Mei and his team. He really gave me a lot of peace, knowledge, hope and confidence to face this process. I could not be more thankful."
Jan 25, 2026
5.0
"All fine"
Jan 1, 2026
5.0
"In the almost 19 years being a patient I can't even remember ever having a truly bad experience at the City of Hope."
Jan 1, 2026
5.0
"Absolutely the best Dr. I have truly loved being his patient. I always feel cared for and understood. I'm beyond grateful to be at the city of hope. My care team is the best. I never feel forgotten! Anytime I talk to anyone struggling with a diagnoses I always recommend COH and my doctor. Truly I can't say enough good things about him and his team. Best Doctor in the world."
Dec 18, 2025
5.0
"He was very kind and respectful of my wishes regarding treatment."
Nov 29, 2025
5.0
"Very knowledgeable & interested in what I had to say"
Nov 29, 2025
5.0
"Excellent service and very friendly and helpful."
Nov 23, 2025
5.0
"All outstanding"
Nov 23, 2025
5.0
"Dr. Mei is an outstanding and caring physician."
Oct 27, 2025
5.0
"Excellent service! Couldn't have received better service anywhere in the world!. I feel very fortunate to have Dr Mei"
Oct 27, 2025
5.0
"I couldn't begin to complement Dr Matthew Mei and his assistance any more than excellent!! I couldn't ask for better experience"
Oct 9, 2025
5.0
"Dr Mei is the best oncologist I've ever had. And I have seen quite a few since my first diagnosis in 2010. [...] I will always recommend Dr Mei and City of Hope [...]"
Aug 16, 2025
5.0
"Very professional"
Aug 16, 2025
5.0
"Everyone was very helpful and concerned about my wellbeing"
Aug 1, 2025
5.0
"Dr Mei is awesome!"
Jul 26, 2025
5.0
"Excellent doctor! Really liked my time spent at my appointment with him."
Jul 11, 2025
5.0
"I have never had a bad experience since I started my treatment with Dr. Mei, I appreciate him very much."
Jun 8, 2025
4.4
"Good"
Jun 8, 2025
4.4
"Good"