Guy Seiji Mayeda

Guy Seiji Mayeda MD

Specialties:

Cardiovascular Disease, Internal Medicine, and Interventional Cardiology
View Location
4.8 / 5 (based on 235 Reviews) View 71 Comments

Make an Appointment

213.977.0419

Request an Appointment

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

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.
April 11, 2025
Everyone is friendly and helpful. Will definitely recommend to friends and family.
April 11, 2025
Dr.Mayeda is kind and trustworthy. I feel comfortable having him as my Cardiologist.
March 28, 2025
Good afternoon. I'm satisfied with the attention I received from the entire medical staff, starting with the doctor and the nurses. It was a very good experience. Please be attentive. Thank you very much, bye.
March 25, 2025
Everything was super great starting with the customer service all employees are super nice treat you like family make you want to come back and recommend them too every one else keep up the great job . The main doctor is great he explained everything perfectly
March 24, 2025
A pleasure to deal with Dr. Mayeda and his staff.
March 21, 2025
With Dr. Mayeda's expertise and the rest of his staff and other doctors in his firm, I am in the best of health thanks to him, Dr. (name removed), and everyone that is connected with their cardio department. Thank you very much.
March 21, 2025
I like the fact that even though I was seen by the NP I was also seen by my Doctor most patients and people I speak would prefer to be seen this way.
March 14, 2025
While I was at the office there was a procedure at which time form a moment I was very nauseous. they were very polite and patient with me. Thankfully I did not upchuck, but the person I am I was embarrassed. :: Later I realized I took 3 mega vitamins on an empty stomach.
March 14, 2025
Well, my name is (PHI removed) and I believe the doctor is very nice and he speaks to you very nice and he take care of you very nice and I like him. Bye.
March 14, 2025
Great doctor
March 11, 2025
I've been working with Dr. Mayeda for more than 20 years. He's always been superb in being clear, in telling me what I needed to know, and in at least one occasion saving my life. The staff as a whole has always been helpful, thoughtful, and skilled. So thank you very much to the whole crew.
March 07, 2025
I receive overall excellent service from everyone at your facility, and I highly would recommend anyone the services. Thank you very much, and I do appreciate giving the feedback. Bye-bye.
March 05, 2025
Dr. Mayeda is a very good doctor, I really appreciate all the stress, thank you.
March 04, 2025
Dr Mayeda is the BEST!
March 03, 2025
I only wished Dr Mayeda and other great doctors from PIH would accept Workers Comp Insurance so that patients like me would have the best doctors and the best treatments available to a patient.
February 25, 2025
Wait was 1 hour and 1:15 minutes
February 04, 2025
Yes, (PHI removed) is my name. Dr. Guy Maeda, very good doctor. I've been having Dr. Maeda for many years. He's a good doctor, caring doctor, and like a dad to me. Very good, very good. I recommend him to everybody.
January 29, 2025
This doctor is excellent and I would highly recommend him to my friends and family.
January 28, 2025
He is an excellent, professional, courteous, caring physician who cares about his patients. He is consistent in being a professional doctor. I highly recommend him.
January 28, 2025
Great service and efficiency!
View More Reviews