Guy Seiji Mayeda

Guy Seiji Mayeda MD

Specialties:

Cardiovascular Disease, Internal Medicine, and Interventional Cardiology
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4.8 / 5 (based on 223 Reviews) View 64 Comments

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213.977.0419

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Guy Mayeda MD FACC (Fellow of the American College of Cardiology), FSCAI (Fellow of the Society for Cardiovascular Angiography and Interventions) is an interventional cardiovascular specialist with additional expertise in endovascular interventions for coronary artery disease, critical limb ischemia, dialysis access shunt failures and aortic aneurysms/dissections.

Dr. Mayeda has always been fascinated by the intellectual challenge and emotional rewards of the medical profession. He considers it both a privilege and a great responsibility to have patients and their families entrust their lives to the care of a physician, often times a complete stranger at the time of the initial consultation. He chose his specialty because cardiovascular disease remains the number one cause of death and disability in America, although recent advancements in medical research and technology have grown exponentially making it possible to successfully treat patients who had been previously diagnosed as “incurable.”

Dr. Mayeda is proud to be part of a hospital based team that provides care for patients who have been deemed too ill or high-risk for conventional medical therapy. This team has the unique ability to evaluate and plan interventions using a multispecialty approach that includes treatments for multi-vessel coronary artery disease, structural heart disease and various vascular maladies.

According to Dr. Mayeda, “the most gratifying aspect of interventional cardiology is the ability to quickly intervene and treat patients with acute life-threatening illnesses and restore them to their former functional status, often within a few days.”

Dr. Mayeda’s patients would be surprised to learn that both his parents were incarcerated in a Japanese-American relocation camp in Arkansas during World War II. His father enlisted in the U.S. Army after graduating from high school in the relocation camp and fought with the 442nd infantry in Italy. His parents’ sacrifice and hard work allowed Dr. Mayeda and his three siblings to attend college and post graduate education.

When he was younger, Dr. Mayeda competed in triathlons and judo but “that was many years ago!” One of his favorite past recognitions was for “Best Handwriting” among the hospital medical staff (pre-dating the introduction of the EHR).

Office Information

Hospital/Group Affiliation

PIH Health Good Samaritan Hospital

PIH Health Physicians

Profile

Gender

Male

Specialties

  • Cardiovascular Disease
  • Internal Medicine
  • Interventional Cardiology

Education

Medical School

David Geffen School of Medicine, University of California, Los Angeles (UCLA)

Harbor-UCLA Medical Center

Internship

St Mary Medical Center-Long Beach (California)

Fellowship

Good Samaritan Hospital

Harbor-UCLA Medical Center (California)

St Mary Medical Center-Long Beach (California)

Board Certifications

  • Cardiovascular Disease
  • Interventional Cardiology

Video

Patient Reviews

April 07, 2026
Dr. Mayeda is an outstanding doctor.
April 03, 2026
Look, I'm (PHI removed) wife. He can't give his opinion because, being 95 years old, he's not very articulate, but everything went well, thank God, thank you.
March 18, 2026
I like the best they respect and helpful I have no question about service the most Dr MAYEDA is my Dr sine 2017 I follow him from (word removed) to Good Samaritan because I trusty him and feeling he the best Dr I have'n see . Thank you Dr MAYEDA safe my life .
March 17, 2026
The front desk was extremely nice and professional. My doctor, Dr. Mayeda, is absolutely great. I trust him very much. He treats me with respect and is very thorough, and I will always continue to see him and recommend him.
March 09, 2026
Dr. Mayeda is an excellent physician. He explains things fully. He is an asset to your business.
March 09, 2026
Dr. Mayeda was very understanding and very easy to communicaate with.
March 06, 2026
Dr. Mayeda always has an excellent bedside manner. He listens and offers advise.
March 02, 2026
They provide good and friendly service.
February 27, 2026
It's always a pleasure for me to visit Dr. Mayeda's office because it always looks clean and dignified. When an office looks dignified you can be sure that they treat their patients with dignity. The office and equipment don't have to be brand new to look clean and nice. As long as they are thoroughly cleaned regularly and the staff treats patients with respect and shows professionalism it puts them in a highly dignified position in their industry.
February 24, 2026
Great
February 06, 2026
I made an error when I was answering the questions. I think it was number two when you asked if it was an easy appointment. I think I put yes, but it was just sometimes, or whatever it is, it should have been a number four. It was easy to get an appointment. I was making when I leave the office. Everyone was very nice. I might not have, I might have done a three instead of a four on that two. They really all should be fours. It's a great experience when I come to that office. The only thing is sometimes it takes a long time. All right. Thank you.
January 19, 2026
Nice
January 13, 2026
My cardiologist and the office staff were professional, courteous, and considerate.
January 06, 2026
Dr. Mayeda is one of the best doctor in U.S.
January 05, 2026
I find out all my appointments. The nurse takes my weight and puts me in. I wait about 20 minutes to actually see the doctor. I know he's spending time with other clients, but I do wait a long time.
December 30, 2025
Dr Mayeda is the best cardiologist. He concern about his patients wellbeing and always professional. I have been his patient for 20years
December 29, 2025
The office was very friendly and I appreciate Dr. Mayeda's willingness to dialogue with me about my concerns.
December 26, 2025
Hello, I wanted to say that (name removed) was very, very extremely helpful. The office staff was very helpful. Dr. Mayeda was helpful and very respectful of our religious beliefs being Jehovah's Witnesses. And we would definitely 100% recommend him and already have recommended him to friends. Thank you very much. We appreciate it so much.
December 23, 2025
They are a very professional and efficient team.
December 22, 2025
Good doctor. I am happy to be Dr. Mayeda patient. Thank you very much. Merry Christmas.
December 16, 2025
Visit process was smooth. Waiting time minimal.
December 08, 2025
Everything is excellent.
December 05, 2025
Dr Mayeda and his staff are so great... fully trust with my heart!
December 05, 2025
All was pleasant. The staff were friendly and professional. My experience was positively heart warming!
November 24, 2025
Dr Mayeda takes the time to thoroughly explain everything and answer all my questions and concerns. He is the best!
November 10, 2025
Dr Mayeda is the most wonderful doctor with amazing expertise who genuinely cares for his patients. I'm so lucky he's my cardiologist! Thank you so much for caring about my health and guiding me!
November 10, 2025
Dr MAYEDA is Great The Staff and Office Manager Care and Understand Thank them for me
October 22, 2025
The office staff and the doctor were very friendly, professional, and was very helpful in explaining my situation. Thank you very much and would highly recommend them for my family and friends.
October 22, 2025
Not great.
October 21, 2025
Dr. Mayeda is very good, excellent, and I would recommend him to anybody. Thank you.
October 21, 2025
Very helpful staff outstanding Doctor always makes my visits like visiting a Friend or Family very comfortable Thanks Dr Mayeda
October 20, 2025
A very nice person who provides exceptional medical care!
October 17, 2025
I'm doing this on the behalf of my mom. You guys are exemplary when it comes to everything. However, trying to get in contact with people in your office is hard, like sincerely hard. She needed some paperwork done. She needed some paperwork finished. And you guys just didn't call back or anything like that. And I find that to be aggravating. But other than that, you guys are pretty good with her care.
October 14, 2025
Everyone is friendly and professional from the moment that you arrive to when you are leaving.
October 13, 2025
Very reassuring and capable
August 26, 2025
It has a very good service, I really liked the treatment I receive, thank you.
August 26, 2025
Great
August 25, 2025
Dr Mayeda has been our family doctor for over decade,and we couldn't be more grateful . He is incredibly caring and treats each of us-my father, sister, my wife and myself - with genuine concern and respect, He monitors our progress closely and always offers thoughtful advice to help us maintain our well-being. What truly sets him apart is the way he treats us like family. His compassion and dedication makes us feel safe, supported and truly cared for. We love Dr. Mayeda and deeply appreciate everything he's done for our family
August 11, 2025
Dr. Mayeda is amazing! I have nothing but good things to say about him.
August 08, 2025
The neighborhood is no longer safe. I am a streetwise male and it is no longer desirable or safe to go to the area of this hospital. It is extreme. Looking for new location.
August 05, 2025
Always satisfied with your services
August 01, 2025
We were pleased that Dr. Mayeda saw us early. We arrived early and he adjusted his schedule to see us. And we requested to have a, as he said, to get a diagnosis, to get an echocardiogram. He arranged for that for us within 20 minutes of a canceled appointment. And we were glad to, So we didn't have to make an extra trip. And he explained that where the heart inflammation is on what part of the chest cavity. So we were pleased with our visit to Dr. Mayeda for (PHI removed).
July 21, 2025
This has, in my entire history of medical complexity, been uniquely a doctor who I trust and am extraordinarily happy to move forward with.
July 18, 2025
Dr. Mayeda is an excellent cardiologist. He listens carefully to what one has to say regarding their own health care, then makes his recommendations for further heart care based upon that patient's input, where relevant, and the clinical evidence. I would not hesitate to recommend him to my family or friends.
July 14, 2025
I have been a patient of Dr. Mayeda since 2003 and trust him thoroughly. I started with him because I was working in the area of Good Sam Hospital when I first had problems and have continued with him though I no longer work in that area.
June 25, 2025
They did everything very well for me. Thank you.
June 25, 2025
The doctor, fellow, and nurses were kind and provided me with excellent service; however, the receptionist desk (payment desk) was not as kind. She did not want to listen carefully to what I said.
June 24, 2025
I felt safe and provided the utmost care from check in to being discharged. Thank you very much!
June 20, 2025
Excellent from the receptionist to the doctor 10 star excellence
June 17, 2025
Dr Mayeda is the best! He is so caring, knowledgeable and thorough. Great bedside manner.
June 13, 2025
Excellent !
June 09, 2025
Very caring and efficient staff
June 06, 2025
Dr Mayeda is very professional and most of all he cares to your well being! Thanks to Dr Mayeda I am in great health!
June 02, 2025
Im happy with all the staff the help me get my next appt & with Dr Mayeda being so patient with me & listened and answered all my questions with my health . God bless Dr Mayeda & all the staffs
May 23, 2025
Great
May 23, 2025
Appreciate the doctor's explanation with my health. Showed care and concern to patient with a smile. Staff were professional and I sometimes joke with them to let their stress be relieved.
May 20, 2025
Trust
May 20, 2025
Prompt service & very efficient
May 16, 2025
I was scheduled to see MD at 1000 am but he sW me at 1035 am
May 16, 2025
Had a 10:15 appointment and didn't see the doctor until 11:30. Bad
May 16, 2025
Very caring and professional staff and physician .
May 16, 2025
The whole time -- checking in , being assisted by staff for ekg/ weight , etc. was very professional and efficient. Dr. Mayeda -- Explained in detail the blood test report, check my current physical condition and planned for my next (stress test). I have total confidence in Dr. N Mayeda. He is compassionate and truly cares for his patients.
May 06, 2025
Dr. Mayeda is the best doctor I've been to so far. He even takes that time to call you on the phone to see how you're doing. And I would definitely recommend him to anyone. And I'm glad he's my doctor.
May 06, 2025
De MAYEDA and staff are very professional and answer all my questions. I always receive the best care here from Dr MAYEDA and Staff.
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