Accepting new patients
Celso L. Diaz, MD
- Cardiology
Average rating:
5.0
Star ratings are displayed only for those physicians who participate in UCLA Health’s patient experience survey program and have received a minimum of 30 survey responses.
Torrance Lomita Specialty Care
|
3500 Lomita Boulevard, Suite M100
Torrance,
CA
90505
US
Languages
Education
Medical Board Certifications
Cardiovascular Disease, American Board of Internal Medicine, 2023
Internal Medicine, American Board of Internal Medicine, 2020
Fellowship
Cardiovascular Disease, University of California, Los Angeles, 2023
Residency
Internal Medicine, McGaw Medical Center of Northwestern University, Feinberg School of Medicine, 2020
Degree
MD, UC San Francisco School of Medicine, 2017
Locations
South Bay
Torrance Lomita Specialty Care
Torrance Lomita Specialty Care
Cardiology| Pain Medicine| Podiatry
+5 more specialties
Hospital Affiliations
Ronald Reagan UCLA Medical Center
Insurance
- Aetna
- Anthem Blue Cross
- Blue Shield of California
- Centivo
- Cigna
- First Health
- Health Net of California
- Interplan (part of HealthSmart)
- Medicare Advantage
- MultiPlan
- UFCM Health System
- Prime Health Services
- Private Healthcare Systems (PHCS)
- TRICARE
- UnitedHealthcare
The list of healthcare plans above may not be comprehensive and could change.
Please contact your benefits coordinator or health insurance company directly to verify coverage.
Visit our health insurance information page for more details.
Reviews
Overall rating:
5.0
Star ratings are displayed only for those physicians who participate in UCLA Health’s patient experience survey program and have received a minimum of 30 survey responses.
287 total ratings |
187 reviews
5.0
July 25, 2026
Dr. Diaz is thoughtful, thorough, compassionate, and genuinely engaged. In an era when so many medical appointments feel rushed, he took the time to listen carefully, answer all of my questions, and discuss my concerns without ever making me feel like he was watching the clock. His expertise is obvious, but what impressed me most was how much he cared about making sure we talked through my issues and treatment. One of the top experiences I’ve had with a physician. 10/10. :)
5.0
July 24, 2026
Very professional and personal. Included me in all discussions, ask my opinions. I need sure. I understood the plan of care.
5.0
July 24, 2026
He took his time and explained everything.
5.0
July 23, 2026
I was well run and very efficient
5.0
July 22, 2026
Takes his time, offers recommendations and suggestions, ask all the right questions to check in about my heart health
5.0
July 21, 2026
Excellent doctor who was incredibly informative with great bedside manner. Thank you so much.
5.0
July 21, 2026
Dr CELSO Diaz was kind, I felt Heard.
5.0
July 17, 2026
He’s just very honest. He’s questioning if he thinks I need to have a certain test done or not. A lot of doctors want you to do things or take some medicine for their benefit not ours.
5.0
July 14, 2026
Dr Diaz is always well prepared and has a comprehensive overview as well as the cardiology perspective. He is excellent listener and communicator
5.0
July 14, 2026
He is a great dr, very thorough.
5.0
July 14, 2026
Top class physician: listens carefully, shares his medical insights clearly, shows keen intelligence and compassion.
5.0
July 13, 2026
My experience with Dr. Celso Diaz is the best; he is the most knowledgeable and caring doctor. I am so glad to be his patient. He cares and follows up diligently. I am also glad he speaks Spanish.
5.0
July 8, 2026
I had a follow up appointment with Dr CELSO Diaz, as always Dr Diaz is very thorough in his examination and explanation of my current health status.
5.0
July 8, 2026
Everything was great
5.0
July 1, 2026
Attentive, caring,assuring
5.0
July 1, 2026
He is very familiar with her health issues and is sharing his care approach with the other doctors
5.0
June 30, 2026
Dr Diaz has a way of making a patient feel comfortable and safe when talking with him. He is patient, professional and kind.
5.0
June 29, 2026
Friendly, smart & clear communicator
5.0
June 26, 2026
He is always attentive and concerned for my well being.
5.0
June 26, 2026
Excellent service
5.0
June 26, 2026
Dr Diaz was efficient and seemed knowledgeable. He listened to me and asked me questions about my health. I feel like he genuinely cares
5.0
June 26, 2026
Dr. Diaz explained everything very well as always. He also is a very good listener.
5.0
June 25, 2026
This was my first meeting with Dr Diaz. Dr Diaz provided perspective about the abnormal liver test reading in my blood work. He was informative about the high cholesterol, the statin I'm taking and the plan to manage my cholesterol going forward. It was a very helpful meeting. I will continue to see Dr Diaz going forward.
5.0
June 24, 2026
He had reviewed my records before he came in. He was pleasant and asked appropriate questions. He let me talk as well.
5.0
June 24, 2026
He reviewed my labs and to the point. Outcome with new med is on goal target.
5.0
June 24, 2026
It was a video call and it went smooth. My doctor answered any and all questions I had.
5.0
June 23, 2026
dr diaz is a fabulous cardiologist so glad i found him
5.0
June 23, 2026
Dr. Celso is extensively knowledgeable about so many cardiac-related issues that I keep coming back to him for my care.
5.0
June 16, 2026
Professional
5.0
June 16, 2026
Calm, listens, to the point. He is efficient, yet appointment did not feel rushed. His support staff was excellent also.
5.0
June 15, 2026
He takes the time to really listen to my concerns, and provides good insight and next steps. I appreciate his patience and understanding.
5.0
June 11, 2026
Efficient Excellent
5.0
June 10, 2026
All went well Dr Diaz made the right call. We are on the right path
5.0
June 10, 2026
Dr Diaz was very nice and very patient
5.0
June 9, 2026
Everyone very helpful and kind.
5.0
June 3, 2026
I appreciate doctor's who listen to their patients input. Dr Diaz is kind and caring.
5.0
June 1, 2026
He listens and educates
5.0
May 23, 2026
He understands both my medical condition and my personality.
5.0
May 22, 2026
Dr. Diaz reviewed all my test results with me in a way that I could understand and he showed kindness and concern about my health.
5.0
May 22, 2026
Dr. Diaz is thorough and provided different options for me to think about. I appreciated how he had reviewed all my information before meeting with me.
5.0
May 21, 2026
very approachable and felt comfortable asking questions
5.0
May 20, 2026
Very compassionate and pleasant.
5.0
May 15, 2026
Very well
5.0
May 15, 2026
Dr. Diaz as usual is very thorough and ensures I get all my questions answered.
5.0
May 13, 2026
Excellent support and detailed information.
5.0
May 11, 2026
An exelent service thank You
5.0
May 11, 2026
It was so smooth ,quick and professional. I really appreciate that!
5.0
May 6, 2026
All of the next steps were explained to me
5.0
May 6, 2026
It was a video call. He couldn’t see me but he explained my CT scan results and answered my questions.
5.0
May 5, 2026
Great bedside manner!
5.0
May 4, 2026
Dr. Diaz explained the risks of my medication very well and that the rewards outweigh the risks. He was very thorough with his explanations.
3.0
May 3, 2026
Not quite satisfied. Didn't give enough info on results of my tests.
5.0
May 2, 2026
Asked a lot of questions-listened and came up with a reasonable plan
5.0
May 1, 2026
On time, efficient communication
5.0
April 24, 2026
from the moment i walked in i received the most courteous and professional service, i felt like a royal!
5.0
April 24, 2026
Excellent and thorough. As always.
5.0
April 21, 2026
Dr. Diaz was excellent. Personable, professional and knowledgeable. He too the time to discuss issues and respond thoughtfully.
5.0
April 17, 2026
Physician was polite, caring, easy to understand, answered all questions, organized, …..
5.0
April 17, 2026
He answered all my questions.
5.0
April 17, 2026
Doc is buttoned up, quick visit, and has corrected my blood pressure issue.
5.0
April 16, 2026
He listens and articulates nuanced, pragmatic health choices. He adds a lot of value to patients. Best doc
5.0
April 15, 2026
Productive, focused, informative, on time
5.0
April 15, 2026
Dr Diaz is very professional and very polite, always make sure that you understand the importance of your health
5.0
April 14, 2026
Professional, uses my time well, xlnt communicator, etc. He's a keeper.
5.0
April 13, 2026
Great doctor. Listens, professional and caring.
5.0
April 13, 2026
Dr. Diaz is knowledgeable, thoughtful, thorough, and professional. He explains the implications of mitral valve insufficiency clearly and asks about any symptoms that might be of concern.
5.0
April 12, 2026
He was very good at serving both my Husband and me at the same time. Saved us some gas money. And got us taken care of all in one day. All was good.
5.0
April 10, 2026
Informative
5.0
April 8, 2026
Very professional and kind
5.0
April 7, 2026
It was an excellent visit. Dr Diaz was knowledgeable about my condition and treatment. He showed concern about my continuing health and was clearly ready to help in any way. My health was stable and no changes were required in my regimen. I like Dr Diaz.
5.0
April 6, 2026
Dr. Diaz is very kind, a good listener and very thorough. Delightful.
5.0
April 6, 2026
A video visit follow-up that was clear and concise.
5.0
April 3, 2026
Good exchange with Dr Diaz. I came away informed and with a clear next step.
5.0
March 31, 2026
Efficient and informative
5.0
March 31, 2026
Short wait times great communication and passionate medical professionals.
5.0
March 31, 2026
Dr. Diaz was a new doctor for me, cardiologist, very thorough and upfront. Very glad I saw him
5.0
March 26, 2026
He takes the time to answer all my questions and really wants to find a solution for me.
5.0
March 20, 2026
Dr Diaz is a great listener.
5.0
March 20, 2026
Doctor Celso continues to do a great job in making sure I’m getting the best care for my condition
5.0
March 19, 2026
Dr. Diaz is amazing. Great “bedside manners” and extrenely helpful during a medical emergency for me
5.0
March 18, 2026
The Dr was exceptionally helpful.
5.0
March 17, 2026
Professional and courteous.
5.0
March 17, 2026
Dr. D?az was attentive with my father. He spoke in his preferred language. He took his mask off sensitive that my father has a hearing issue.
5.0
March 11, 2026
Dr Diaz and his staff were amazing. They were very polite and helpful and calming. I totally recommend them to everyone
5.0
March 11, 2026
excellent
5.0
March 10, 2026
Great service
5.0
March 9, 2026
Dr.Diaz took time to consider nextvsteps and answer my questions.
5.0
March 6, 2026
Dr Diaz is a smart, informed good communicator. Staff super friendly and competent. Love Pre Check-in.
5.0
March 6, 2026
Very timely and efficient
5.0
March 5, 2026
Good discussion with doctor.
5.0
March 5, 2026
Dr is concerned and caring.
5.0
March 4, 2026
Dr Diaz is great very caring and professional. Always address my concerns . And he is very knowledgeable
5.0
March 3, 2026
Compassionate. Caring and Collaborative— a skilled expert
5.0
March 2, 2026
Great person. So wonderful to have him as a doctor. He is very personable and human, on top of being a terrific doctor.
5.0
February 25, 2026
Dr. Diaz always answers my questions.
5.0
February 25, 2026
As always .Dr Diaz and his nursing staff provide excellent care..
5.0
February 24, 2026
Dr. Diaz was very informative and provided additional insight into the reason for my visit.
5.0
February 20, 2026
Dr is very kind and make me feel conformable.
5.0
February 15, 2026
He addressed all my questions.
5.0
February 13, 2026
Dr Diaz is a wonderful doctor. He is kind, caring, helpful and professional.
5.0
February 13, 2026
Dr. D?az is a very professional and compassionate doctor who looks out for his patient?s wellbeing. As always, he listened carefully and gave me good advice.
5.0
February 13, 2026
dr. Diaz is fabulous We have a situation with low blood pressure that we’ve continued to work on diligently Today his decision was to increase the medicine to two tablets a day contact him in 30 days and if I need to see a neurologist, I will
5.0
February 11, 2026
One of my favorite physicians, he is kind, compassionate, excellent communicator, and answers all your questions
5.0
February 11, 2026
My visit included a discussion with an intern cardiologist who was helpful and patient with my questions Also displayed great empathy My cardiologist himself joined in and made decisions quickly to improve my health
5.0
February 11, 2026
Perfect
5.0
February 10, 2026
Awesome and thank you
5.0
February 6, 2026
Ask questions got answers
5.0
January 28, 2026
Dr. Diaz explained things thoroughly to me and listened to all of my concerns. I am glad I got connected to him as my cardiologist.
5.0
January 27, 2026
Thoughtful
5.0
January 26, 2026
Dr. Diaz was, as always, a reliable source of knowledge and wisdom as he expertly considered my complicated case and worked with input from me to put together a stellar plan for my care.
5.0
January 26, 2026
I like my doc. He is very personable and thorough I believe.
5.0
January 24, 2026
Excellent meeting.
5.0
January 23, 2026
Dr Diaz very informed read my recent treatment from other doctors. He reviewed my medications and suggested to changes which will take place immediately
5.0
January 22, 2026
He is through!
5.0
January 21, 2026
Good video visit with Dr Diez.
5.0
January 20, 2026
The doctor was very nice very patient very professional and took my health very seriously. He was very thorough and very nice.
5.0
January 14, 2026
Dr. Diaz listens to me and cares about my opinion about my health care. He doesn’t rush, he takes the time to answer my questions and to make sure I understand what I need to know.
5.0
January 13, 2026
The staff at the front desk was very friendly and Dr. Diaz’s nurse was very pleasant and did an excellent job of her duties Seeing Dr. Diaz is always a pleasure even if you have a health problem
5.0
January 13, 2026
I have the utmost respect for all of my doctors and healthcare professionals at UCLA. It is the only place where I always feel like my well-being is their top priority and prime responsibility.
5.0
January 12, 2026
Dr Diaz is great. Very kind, and compassionate.
5.0
January 12, 2026
Straightforward and efficient
5.0
January 9, 2026
Dr Diaz thoughtful and very nice as always.
5.0
January 9, 2026
Dr. Diaz always listens and works with me regarding any issues going on with my heart.
5.0
January 9, 2026
Tele visit follow up after an echocardiogram. Dr Diaz was helpful and answered my questions
5.0
January 7, 2026
I was listened to. Gave good feedback. Gave ideas for questions I had and the channels to choose to follow up on those.
5.0
January 7, 2026
Very attentive and on time
5.0
January 7, 2026
First meeting: on time, did not need to waste time reading me my medical record/came prepared -> had read my record.Front office/staff very helpful. Easy parking
5.0
January 6, 2026
Good
5.0
January 5, 2026
All Is fine
5.0
January 5, 2026
One of the Best doctors I’ve seen within the ucla medical group
5.0
January 2, 2026
Dr Diaz is a good listener and cares about me.
5.0
December 19, 2025
He was thorough. And gave me very good information so he said keep up the good work and I really enjoy him. Have a merry Christmas.
5.0
December 11, 2025
Dr. Diaz is an excellent doctor. He listens and cares about my symptoms and he helps me. Dr. Diaz is a very smart and kind doctor
5.0
December 9, 2025
Great counsel and direction from Dr. Diaz. I appreciate having him in my corner
5.0
December 8, 2025
Dr. Diaz, As always he was very professional, he showed patient care at all times, he asked questions and provided good medical feedback
5.0
December 8, 2025
Prompt, knowledgeable, pleasant and thorough
5.0
December 5, 2025
He was attentive, professional and caring.
4.0
December 3, 2025
It was fine.
5.0
December 3, 2025
Dr Diaz listened and came up with a great gameplan
5.0
December 1, 2025
Friendly and approachable
5.0
November 27, 2025
Very competent
5.0
November 27, 2025
Dr Diaz is always a pleasure. He explains all my concerns clearly, His demeanor is always calm & compassionate. I’m grateful for Dr Diaz
5.0
November 25, 2025
Dr. Diaz is very professional and insightful, and deals with my current complex medical situation in a clear and helpful manner.
5.0
November 25, 2025
Great discussion with Dr Diaz. Always responsive and helpful. Very proactive and I appreciate that.
5.0
November 21, 2025
He’s the ethos of doctor-patient connection. The BEST I’ve encountered for an anomalous issue.
5.0
November 20, 2025
He listened to me and adjusted the medication.
5.0
November 20, 2025
Dr. Diaz is always very good at listening and trying to figure out what’s going on with my heart.
5.0
November 20, 2025
Very informed on my meds and conditions since last visit
5.0
November 19, 2025
Dr was patient with me and really listened to me.
5.0
November 17, 2025
Dr Diaz is an excellent doctor. Very professional and caring.
5.0
November 17, 2025
Just a follow up. I didn't expect anything new. But he went over the things I should be monitoring, esp blood pressure, and we agreed on a recheck in 6 months.
5.0
November 16, 2025
Overall experience was good.
5.0
November 14, 2025
Authoritative and efficient
5.0
November 10, 2025
He seems very attentive to my issue at the moment.
5.0
November 10, 2025
Good consultation and we built a strong game plan moving forward
5.0
November 7, 2025
We had to discuss medication for A Fib and other options. Also if re-starting some, medication bothered my sensitive stomach ( which it did about 2 months ago ) Also got a referral to talk to another cardiac specialist about Heart rhythms
5.0
November 7, 2025
Good listener patient very competent
5.0
November 7, 2025
Doctor Diaz is amazing from day one.
5.0
November 1, 2025
As usual excellent experience
5.0
October 31, 2025
Dr Celso D?as Made me feel very comfortable he was great super professional and fast, I loved that .. I liked the fact that he was able to see one of the problems right away . Thank you Dr C Dias I will see him again He made me feel very good !!
5.0
October 29, 2025
Listens well and explains thing where I can understand them. And is constant seeking ways to help my condition
5.0
October 29, 2025
Early to my appointment and always a pleasure to get great health advice from Dr Diaz. I feel like he covers everything easily and understandably.
5.0
October 28, 2025
Muy profesional y muy buena atención
5.0
October 28, 2025
Listened to concerns.
5.0
October 28, 2025
Dr. Diaz was highly knowledgeable about my condition and was very thoughtful in regards to the type of treatment he was going to provide.
5.0
October 27, 2025
Very experienced. Very thorough. Explained tests that need to be done. Took time to explain without being rushed. Was in to see me quickly-didn't make me wait to see him.
5.0
October 24, 2025
He was thourough and reassuring.
5.0
October 24, 2025
Dr. Diaz is an excellent physician. He listens to the patient and takes his time and includes me and his decision-making process.
5.0
October 20, 2025
Very caring and patient doctor.
5.0
October 20, 2025
Quite thorough and courteous.
5.0
October 18, 2025
He and I had a great conversation on future testing for follow up on my condition…
5.0
October 15, 2025
Always thorough discussion and good communication
5.0
October 14, 2025
Seems good, i like him
5.0
October 14, 2025
fast, productive, very positive visit
5.0
October 11, 2025
Listened, answered questions.
5.0
October 8, 2025
Dr. Diaz was great and put a plan together for my future health. Amazing guy
5.0
October 8, 2025
Dr. Diaz was wonderful. He explained everything clearly and calmed my fears.
5.0
October 8, 2025
Went as well as I anticipated
5.0
October 7, 2025
Dr Diaz is a very professional and caring person.
5.0
October 6, 2025
He explained things well today
5.0
October 3, 2025
I appreciate Dr. Diaz’s professional and friendly bedside manner along with his medical knowledge.
5.0
October 1, 2025
Took his time to talk to me
5.0
October 1, 2025
He is very cooperative and have lot of patience to listen everything . Excellent service
5.0
September 30, 2025
Excelent service I was well taken Care of
5.0
September 30, 2025
Excellent listener. Engaged and empathetic. Very professional- really one of the finest doctors I’ve met.
5.0
September 30, 2025
Met my expectation
5.0
September 29, 2025
Prompt to appt time. Thorough