Guy Seiji Mayeda

Guy Seiji Mayeda MD

Specialties:

Cardiovascular Disease, Internal Medicine, and Interventional Cardiology
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4.8 / 5 (based on 256 Reviews) View 66 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

June 29, 2026
My Doctor is very professional and very Knowledgeable. I would always recommend him to family and friends. He's The Best
June 22, 2026
Everything was excellent, thank you.
June 22, 2026
He possesses superb medical skills, high medical ethics, and is kind and approachable to patients; he is trustworthy.
June 19, 2026
I would like to thank Dr Guy Mayeda for his sincere and very helpful guidance. Thanks also to his staff for very efficient job well done!
June 19, 2026
Not at All at now,, Thank you
June 16, 2026
My experiences with Doctor Mayeda, have been excellent. I trust him with my heart. What I notice about the PIH doctors is they must hurry on to the next patient and you could see it in their eyes, and it's a pity. :: I feel that I can't ask one extra questions, because I don't want my doctor to go overtime, as their institution expects of their doctors.:
June 16, 2026
Very concerned about health, physically and mentally.
June 12, 2026
Yes, I believe my provider speaks to me like a normal patient with understanding, with compassion, and is very courteous and professional and down to earth. I couldn't ask for a better provider as Dr. (name removed). Thank you.
June 12, 2026
Each time I have a meeting with Dr. Mayeda, he asks detailed questions pertaining to my health condition. He is always prepared to see me. He knows my history and reviews my test results and takes time to explain to me in a compassionate manner. I see and feel the gentle caring ways a doctor should connect with his patient.
June 09, 2026
Dr. Mayeda is an excellent, professional, and courteous doctor, I wouldn't want any other
June 08, 2026
Hi, my name is (PHI removed) and I really enjoy being a patient of Dr. Mayeda. Dr. Mayeda listens to me very carefully. He understands my needs and he knows what I need. I enjoy talking to him about his family and his grandchildren. I would recommend Dr. Mayeda to be anyone's cardiologist. He's a fantastic person and a great doctor.
June 02, 2026
Dr. Mayeda is kind, understanding and very knowledgeable.
May 26, 2026
I have trust in my provider.
May 18, 2026
Excellent
May 15, 2026
The service with this office is the best I have received in many years. Dr. Mayeda and office personnel, they are very professional. They're very, very polite and professional and I didn't have to wait a long time. It was, you know, fast, the service is fast. The staff is very friendly and Dr. Mayeda takes a long time to explain, plenty of time to explain any questions I might have. It's a wonderful, wonderful service. I don't have anything that to recommend that to make it better. It's the best service, like I said, that I have in many, many years. I'm very satisfied with their services and I will highly recommend.
May 15, 2026
Very pleasant!
May 11, 2026
I so enjoy seeing Dr. Guy Maeda. He's very knowledgeable and caring and takes care of me well. Thank you very much. (PHI removed).
May 08, 2026
He's very good, except this is the first time I've met him, so I just gave him 8. It doesn't mean that I don't like him or he's not good. That's why I gave 8 because this is the first time I've met him. And he's very good, the way I talk to him. Yeah, he's very nice.
May 08, 2026
I am well satisfied with the service and attention afforded to me during my visit.
April 20, 2026
Thank you Dr Mayeda and staff
April 13, 2026
I was deeply impressed by how positive and hardworking everyone involved in the work is.
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.
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