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
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 health care 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.
302 total ratings |
199 reviews
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
5.0
September 12, 2025
Did not feel rushed. Took his time to discuss possible solutions.
5.0
September 10, 2025
Good
5.0
September 10, 2025
My doctor is always present and makes me feel heard
5.0
September 9, 2025
He was very easy to speak to and understand. Answered my questions clearly
5.0
September 9, 2025
He was very very concern about my health Very profesional Thank You
5.0
September 9, 2025
Excellent visit. The doctor explained everything thoroughly to me.
5.0
September 8, 2025
A technician doing a heart monitoring test noted an elevated heart rate and alerted my doctor. He has put me on two new medications. My doctor. Is very patient with me.
5.0
September 8, 2025
Excellent as always
5.0
September 5, 2025
Dr Diaz is always very attentive
5.0
August 27, 2025
Dr. Diaz was well informed of recent test results Very helpful discussing my prognosis and medications
5.0
August 25, 2025
Dr . Diaz, listens carefully & offers clarity when addressing a resolution for my concerns. He was quick to help & order further testing.
5.0
August 20, 2025
Dr Diaz was great.
5.0
August 20, 2025
He listens & is compassionate
5.0
August 20, 2025
I always have good experiences with Dr. Diaz.
5.0
August 18, 2025
Dr Diaz was very friendly and attentive. He asked pertinent questions and listened to my responses. We agreed to meet again in a year.
5.0
August 13, 2025
Dr Diaz is always wonderful. He is kind and always helpful. And always explains everything clearly to me.
5.0
August 13, 2025
Dr. Diaz took time to listen and explain things to me. He ensured my questions were answered
5.0
August 13, 2025
Listens well, doesn’t rush me
5.0
August 12, 2025
I love Dr Diaz. He's smart, helpful, listens and I know I'm in good hands
5.0
August 12, 2025
On time Answered all my questions. Explained things clearly
5.0
August 12, 2025
Everyone at the location are very welcoming and professional.
5.0
August 8, 2025
Comfortable, informative and built a solid game plan
5.0
August 6, 2025
Dr. Diaz is professional and kind. I feel that he truly cares about my well-being. He took the time to listen to me and answer my questions. I am very happy that he is my new cardiologist.
5.0
August 6, 2025
Dr. Diaz was timely, thorough and spot on with addressing all my concerns and explained all the next steps leaving me with no questions. The front office team was great and quick as well.
5.0
August 6, 2025
Engaged in my care, aware of the holistic approach of my team and letting this inform his insight and recommendation.
5.0
August 4, 2025
Excellent visit. I like Dr. Diaz and he was thorough and professional for my visit. Clearly, he cares about my health and recommended a new prescription to help with my condition.
5.0
August 4, 2025
Excellent discussion on future health care needs
5.0
August 1, 2025
In order to clear me for a colonoscopy, the doctor reviewed the EKG and vitals. He also examined my chest and back. This comprehensive examination gives me peace of mind.
5.0
July 29, 2025
Concerned and thorough about my health
5.0
July 25, 2025
He is very kind and wonderful and cares for his patients.
5.0
July 22, 2025
Did took time and explained
4.0
July 22, 2025
Dr. Diaz was very professional and answered all the questions we asked about my recent heart attack as well as treatments and next steps.
5.0
July 22, 2025
Compassionate
5.0
July 21, 2025
Got in early. Dr friendly. Answered questions and addressed concerns. Did not feel rushed.
5.0
July 21, 2025
First appointment. Doctor Diaz and staff are very friendly. Was seen quickly and not rushed
5.0
July 21, 2025
He explained very thoroughly so that I understood my test results
5.0
July 18, 2025
Knowledgeable, pleasant,easy to talk too.
5.0
July 18, 2025
Detailed and informative regarding the issues.
5.0
July 17, 2025
Dr. Diaz has a really good bedside manner. He answered all of our questions regarding my test. He made suggestions and talk them over with me.
5.0
July 17, 2025
Informative, pleasant manner. Very satisfied!
5.0
July 14, 2025
Dr. Diaz is personable, caring and professional. He always answers all my questions /concerns and makes me feel comfortable and heard.
5.0
July 13, 2025
Answered my questions, gave me good options
5.0
July 11, 2025
I had many questions for Dr Diaz . He was patient with me and explained how the heart works . He answered everything I asked. Good Work
5.0
July 11, 2025
Dr Diaz was Oustanding during our appointment.. He engaged me in a conversation about my test results and the path forward. We discussed my daily events, to get a deeper insight for the present results. Professional but friendly
5.0
July 11, 2025
Thorough, professional, personable. I feel like I get great care.
5.0
July 10, 2025
I felt respected, and valued as a patient, and above all the doctors expertise kept me well informed. He took time to go over my medication’s and give me advice about what to do going forward. He’s a wonderful doctor.
5.0
July 10, 2025
The doctor was prompt, courteous, caring, and very thorough. I felt he had my best interest for my health in mind and also listen to my concerns. I had a very good experience.
5.0
July 10, 2025
The staff was great and the wait was fast today. The Dr was pleased that we finally figured out the medication that has brought my blood pressure down. All was good
5.0
July 9, 2025
Conferred about results and steps still warranted. Nephrology getting involved to decide if I can handle contrast is per Dr Diaz directive and appreciated.
5.0
July 7, 2025
He was very informative and helpful.
5.0
July 7, 2025
Dr Diaz was very professional and responsive to my problem and the recommended treatment. Appointment was on time and efficient. Satisfied with the visit.
5.0
July 7, 2025
Wait time after check in and to see Dr was minimal and on time.
5.0
July 6, 2025
Dr. Diaz listens to you and answers all your questions. He is knowledgeable and is up-to-date with my care, meds, etc. His staff is professional and easy to work with.
5.0
July 2, 2025
Productive: Minimal wait time. Good communication w Doctor, tech, and student assistant. Follow up planning.
5.0
July 1, 2025
Dr Diaz was wonderful, very knowledgeable, and answered my questions. I felt he had excellent communication skills.
5.0
June 30, 2025
Dr. Diaz is an excellent physician. He takes time with his patient and explains treatments and other aspects of care very thoroughly and professionally always making sure the patient doesn’t have any questions and feels involved in the plan of care.
5.0
June 30, 2025
Dr Diaz was very thorough and recommended a heart monitor to check for arrhythmia.
5.0
June 27, 2025
Thorough, efficient and thoughtful
5.0
June 27, 2025
Efficient, caring and listens
5.0
June 25, 2025
Very understanding and listened to my concerns
5.0
June 24, 2025
very kind, professional, patient. Takes time to explain clearly and takes time to answer any questions or concerns.
5.0
June 24, 2025
Very thorough and patient
5.0
June 24, 2025
Good visit which addressed current health issues with some urgency. Recommended appropriate follow on actions.
5.0
June 23, 2025
Very professional and friendly
5.0
June 20, 2025
Dr Diaz is very knowledgeable and listens well. I’m comfortable with him and confident in him
5.0
June 17, 2025
I feel confident that Dr Diaz is following through to be sure that I’m ok
5.0
June 15, 2025
He is not giving up on trying to fine and answer to keep my high blood pressure down. I am in hopes that we can get here.
5.0
June 13, 2025
Answers questions
5.0
June 13, 2025
Attentive , personable , knowledgeable. Sense of humor.
5.0
June 13, 2025
on time, yo the oint. Dr dDiaz addressed his concerns and explained well. The Doctor listened to my heart and he reviewed past history. He discussed his plan going forward.
5.0
June 13, 2025
Dr Diaz was prepared, knowledgeable, responsive and reassuring,
5.0
June 13, 2025
I appreciate how the UCLA doctors and particularly Dr. Diaz listen to you and makes you feel heard
5.0
June 12, 2025
I’m a new patient of Dr Diaz and I can see he is thorough.
5.0
June 12, 2025
The doctor was patient and answered all questions where you could understand them. By this, I mean, he explained medical terms so that a person who was not in the medical field, could understand them.
5.0
June 11, 2025
Everything went well
5.0
June 11, 2025
It was a very good doctor visit. Very polite explains everything very well friendly very helpful receptionist very friendly and enjoy. Enjoy visit. Could not get any better.
5.0
June 10, 2025
Answered all my questions, clear on his recommendations
5.0
June 10, 2025
The cardio dept at UCLA seems to be a well run facility staffed by friendly and competent people. Dr Diaz answers all my questions and I feel confident with his treatment and advice.
5.0
June 9, 2025
Very kind and knowledgeable.
5.0
June 9, 2025
Very clear explanations of my treatment plan
5.0
June 6, 2025
Dr, Happy, good experience,
5.0
June 6, 2025
Went super good
5.0
May 27, 2025
It went efficiently and I was addressed as well as I could have expected.
5.0
May 16, 2025
The best
5.0
May 15, 2025
I felt comfortable, he answered my questions and he seemed knowledgeable.
5.0
May 14, 2025
Today was my first appointment with Dr. Diaz. He is a keeper! He addressed all of my concerns. I am comfortable with the tests that he ordered. I look forward to our next consultation.
5.0
May 14, 2025
Professional informative Good teacher
5.0
May 14, 2025
Fue muy buena gracias
5.0
May 12, 2025
Very helpful. Answered all questions. Very clear discussion and instructions. Appreciate the time and insights.
5.0
May 9, 2025
All my questions/concerns were addressed
5.0
May 6, 2025
Super nice and explains everything.
5.0
April 29, 2025
Dr. Diaz is very knowledgeable and professional. He was thorough and made sure to answer all questions.
5.0
April 28, 2025
He was quick and knowledgeable.
5.0
April 25, 2025
Dr Diaz came in prepared to chat, looked at MyChart before he met with us. Answered all our questions
5.0
April 25, 2025
Knowledgeable and concise. Considerate of all variables!
5.0
April 23, 2025
Dr Diaz is compassionate, empathetic and a good listener. He spent a good amount of time looking at my health and my concerns as i was extremely nervous and fearful. He is very professional and thorough and suggested a good path of action. I am so grateful.
5.0
April 23, 2025
Nice guy. Listens
5.0
April 22, 2025
Pleasant professional and clear.
5.0
April 21, 2025
He’s an outstanding physician. Takes his time, answers all my questions. Highly recommend him
5.0
April 17, 2025
Very responsive and concerned & knowledgeable
5.0
April 17, 2025
Quick fast and easy
5.0
April 15, 2025
Via video follow up visit. All went well
5.0
April 10, 2025
Very thorough with my visit today.
5.0
April 9, 2025
Cardiologist appointment for first time, Dr Diaz had read my pertinent data and that allowed for an informed start to our work. He listened to my insight and history and gave input as well as decisions for future clinical labs.
5.0
April 8, 2025
My usual doctor is on vacation this week so I saw Dr. Celso Diaz. He was patient and listened well. He also explained things well regarding medication and what he was going to do today in terms of testing.
5.0
April 7, 2025
The doctor and staff were friendly and efficient. The doctor listened to what I had to say.