Donald J. Mahon, MD
Orange, CA 92868
- Mission Heritage Medical Group and Affiliated Physicians
- St. Joseph Heritage Medical Group and Affiliated Physicians
- St. Jude Heritage Medical Group and Affiliated Physicians
Orange, CA 92868
St. Joseph Heritage Orange - Cardiology
1140 West La Veta Avenue, Orange, CA 92868
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About Donald J. Mahon
Dr. Mahon is a cardiologist with special training in invasive and interventional cardiology. He has special expertise in Rotoblator, atherectomy, stent replacement and valuoplasty. He also specializes in the care of patients with pulmonary hypertension and structural heart disease. Dr. Mahon is accepting new general cardiology patients.
Baylor College of Medicine
InternshipBaylor College of Medicine
InternshipUniversity of California
ResidencyUniversity of California
FellowshipUniversity of California
- American Board of Internal Medicine, Cardiovascular Disease
- American Board of Internal Medicine, Internal Medicine
- National Board of Physicians and Surgeons, Internal Medicine
- National Board of Physicians and Surgeons, Cardiology
- National Board of Physicians and Surgeons, Interventional Cardiology
Providence St. Joseph Hospital - Orange
Community Reviews
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As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.
Dr. Mahon has been my cardiologist for over 15 years. He has always been professional and provided me with excellent healthcare. He has always listened to my comments/questions and given me answers and opinions that I understand. He has never talked down to me, or over my head. When I leave the exam room I understand the plan we've just discussed. I never leave an appointment wondering what he said, or disagreeing with our course of action. I have recommended him and his staff to my friends.
Providence Patient
I appreciate the excellent care I get from my doc
Providence Patient
All good.
Providence Patient
Always listens, always very though
Providence Patient
Dr. Mahon always is interested in what is happening and is good to reassure you on things that you discuss
Providence Patient
My very life was saved by Dr Mahon in 2013.
Providence Patient
I have received excellent care from this provider.
Providence Patient
Dr. Mahon is the BEST! He always takes time to listen, I completely trust him. I recommend him to all my family and friends. He's just the best!
Providence Patient
Very happy with this doctor and his office staff.
Providence Patient
Visit are always good, informative, questions answered
Providence Patient
Dr Mahon always provides me with excellent care................
Providence Patient
Dr. Mahon is an exceptional cardiologist. And has been got over 25 years. I am grateful to be his patient.
Providence Patient
Dr Mahon is a skilled cardiologist that has taken care of me since 2001.
Providence Patient
I am thankful for Dr Donald Mahon as my Cardiologist and my life and wellbeing is better for it
Providence Patient
Was quick but efficient followup
Providence Patient
Have always been treated with respect, kindness and respect.Have always had a positive experience in this office.
Providence Patient
Dr. Mahon was very helpful and respectful regarding my health care. He follows up as appropriate.
Providence Patient
Dr Mahon seems to care about my health. Thank you
Providence Patient
Attentive to all my concerns
Providence Patient
Not only do I love Dr.Mahon and the Services he performs, but I've got my daughter and my granddaughter going to him also and they love him
Providence Patient
Great job
Providence Patient
Doctor was knowledgeable about my condition, listened to my concerns and modified a medication. He was very patient and kind.
Providence Patient
Detailed and caring
Providence Patient
Very professional, knowledgeable provider. I trust Dr. Mahon's treatment of my condition implicitly.
Providence Patient
During this visit I felt rushed seeing how I was the last patient of the day I spent about 45 minutes in waiting room and when the doctor came in it seemed like I didn't have any time to talk to the doctor about my concerns this time I was very disappointed with the care I received and the fact that I didn't have enough time to talk about anything I was concerned about.
Providence Patient
Dr Mahon has great experience and it shows in how he handled the visit. Very good
Providence Patient
He is a great Dr
Providence Patient
Dr. Mahon listens to my concerns and offers appropriate advice and recommendations.
Providence Patient
Dr. Mahon is fantastic. I Never feel rushed. Answers all my questions.
Providence Patient
Everything went perfectly.
Providence Patient
Excellent health care
Providence Patient
Courteous service from the nursing staff. Dr Mahon always listens to and answers my questions. I always have the feeling that he's there to help me stay well.
Providence Patient
Excellent care and very professional
Providence Patient
Dr Mahon was absolutely amazing in his follow up to my most recent echo cardiogram - he actually proactively called me personally to talk about the results and the fact that he knew due to my cancer chemo treatments that my oncologist would be concerned - he reached out to their office also. I was beyond impressed he took the time to reach out to me directly!
Providence Patient
Great visit as always
Providence Patient
Dr Mahon is an amazing cardiologist, I would be happy to recommend him to anyone seeking a knowledgeable doctor.
Providence Patient
All went well with my annual follow up.
Providence Patient
Very good heart Dr. Been with him for years..
Providence Patient
Dr Donald Mahon has been taking care of my health issues for years and I am very happy with the service I always receive.
Providence Patient
Dr Mahon is very good caring doctor
Providence Patient
Dr Mahon is always helpful and understanding
Providence Patient
Very good communication between Doctor, nurse and receptionist.
Providence Patient
Dr. Mahon is a good listener, pleasant to discuss my cardio related issues, knowledgeable, and answers all my Inquires. I'm fortunate to be In his care for my cardio health related Issues. He also performed a successful cardioversion procedure on me In 2021. At this time he feels I don't need any further testing, but I will discuss this again with him In 6 months at my next appointment. I want to stay on top of my cardio health.
Providence Patient
Dr. Mahon is always very professional and helpful. Thank you
Providence Patient
Drs need to explain exactly why a change in meds. What to expext, what meds are to do. Explain when to take. Breakfast lunch dinner??? ALL Doctors should ask if we have any questions or other concerns, before walking out of room. WE ALL have onebody, one life & we trust doctors to help us & they're getting paid dearly from what I've read. i
Providence Patient
Excellent service
Providence Patient
Always a positive experience.
Providence Patient
DR. MAHON, OFFICE STAFF ARE GREAT.
Providence Patient
Excellent
Providence Patient
Satisfied with my interaction with the doctor and found him attentive
Providence Patient
Professional staff, experienced and highly competent doctor and other providers, a good experience all around.
Providence Patient
Dr Mahon is an excellent doctor. He's very good at listening and explaining things. A+ doctor.
Providence Patient
He explained the course of treatment for current and future
Providence Patient
Outstanding
Providence Patient
Good
Providence Patient
The Dr was very helpful with his advice.
Providence Patient
Good
Providence Patient
He was very aware of my condition and of the results of my tests.
Providence Patient
Very good experience would recommend
Providence Patient
I wish all practices and their staff were run as efficiently and expertly as Dr. Mahon and his staff !
Providence Patient
Dr. Mahon has always provided me with the BEST CARE!
Providence Patient
Always feel I am respected when I visit this office
Providence Patient
Good
Providence Patient
All good ! :)
Providence Patient
Provider always has a positive attitude
Providence Patient
Excellent in all aspects.
Providence Patient
Happy
Providence Patient
I am very pleased with my provider and the practice as a whole.
Providence Patient
Excellent
Providence Patient
I've seen Dr. Mahon for over 20 years and have always felt I was given the best cardiologist possible.
Providence Patient
Dr. MAHON has provided excellent care for me since 1998.
Providence Patient
Dr. Mahon gave clear instructions on when to seek help for my condition.
Providence Patient
I am always very satisfied with the care I receive from Dr. Mahon and his team...........Everyone I have encountered was professional, personable, and helpful. I have every confidence in Dr. Mahon's decisions regarding my care................
Providence Patient
Dr Mahon is respectful, listens carefully, and responds in a way that is easy to understand. I really trust him.
Providence Patient
My check-up with Dr. Mahon was great. We went over my lab results since I started taking Repatha. We also discussed scheduling my next stress test (nuclear cardiology imaging), which his office handled. As In the past, my appointment with Dr. Mahon and his staff was professional, Informative and helpful.
Providence Patient
Dr Mahon has been my cardiologist for several years. Medical care has always been outstanding on all levels.
Providence Patient
Just appreciate all around sevice and care Thank you
Providence Patient
Very thorough and reassuring.
Providence Patient
Dr mahon was a huge help for me on [Date], 2016 AND continues to help me with my heart .
Providence Patient
Good
Providence Patient
Good
Providence Patient
The care was very professional and to the point. He asked good questions, with the goal of making me feel better.
Providence Patient
With the transparency of the medical team, and all of the data on MyChart, I love this practice. You all listen to me and make me feel heard. You talk to me, and not at me. WELL DONE.
Providence Patient
Good doctor
Providence Patient
Dr Mahon took my concerns seriously, and answered my questions, even tho they may not have been 'serious' as they seemed to me. I appreciate Dr Manhon's concern for my feelings. Dr Mahon, I feel is a real asset to his profession and to your Cardiologist Group. Thank You
Providence Patient
He's the best!
Providence Patient
Dr Mahon is extremely knowledgeable, listens. I have complete confidence in him.
Providence Patient
Dr Mahon was kind and patient with me, I have the utmost confidence in my care by Dr Mahon. The office staff were all friendly and patient with me, excellent staff.
Providence Patient
Dr Mahon is one of the best in the business. He saved me from possibly have a major heart problem. I will always be grateful. I recommend him every chance I get.
Providence Patient
Great
Providence Patient
Great care
Providence Patient
Dr Mahon was very helpful explaining all the test results I had questions about and what they mean to me and my condition specifically. He was calming.
Providence Patient
Dr Mahon is outstanding, knowledgeable , and compassionate. I recommend him highly!
Providence Patient
Dr. Mahon is an excellent cardiologist.
Providence Patient
Excellent conversation with Dr Mahon. He is personable and able to communicate my health issues clearly and understandable.
Providence Patient
Excellent
Providence Patient
Very satisfactory
Providence Patient
You guys are the best!
Providence Patient
Dr. Mahon is excellent, caring with very clear explanations!
Providence Patient
Very professional and courteous staff and doctor. Thanks
Providence Patient
Dr. Mahon is very objective, straight to the point, and always keeps the patient's best health interests as his top priority. I believe Dr. Mahon always tells me the truth about my cardiac situation promptly.
Providence Patient
Dr Mahon is very knowledgeable and in tune with the issues. He listens and explains. I feel very safe with him. He is very busy, so I have to make sure I book far ahead.
Providence Patient
I have been a patient of Dr Mahon since Aug [Date] 2023. He is very professional, knowledgeable, and thorough. He was attentive to the issues issues I had....recommended a plan of treatment, and referred me for further work-up with a Vascular Surgeon following a Renal Ultrasound for an Abdominal bruit. I am very confident in the treatment I have received from Dr Mahon, and would not hesitate to recommend him if asked..............
Providence Patient
Very good.
Providence Patient
Dr. Mahon understands my condition, and made a referral to a colleague to consider future options.
Providence Patient
Dr Mahon is an exceptional doctor. We've moved to [Location] County but continue to see him based on his dedication & care.
Providence Patient
Dr is a very busy Cardo Specialist and as limited time per pt need to hire more ,Cardo drs
Providence Patient
I was seen at my appointment time.
Providence Patient
Excellent care
Providence Patient
Good experience, good plan on going forward.
Providence Patient
I had a life threatening condition culminating 1 year ago, I saw this provider- he started medical investigation , it wasnt a problem in his specialty ,after 3 months to diagnose. 2 months to arrange surgery . I am completely recovered now and am working on another medical condition with this provider. I received excellent medical care from everyone. And everything went smoothly and perfectly. I am grateful to be alive and believe if treated somewhere else would not have survived. ( I read the statistics)
Providence Patient
Very good Doctor
Providence Patient
Dr Mahon is my cardiologist and my husbands. He is friendly yet professional, caring and listens attentively. I am always comfortable and relaxed during my time with him If I have questions, he answers in terms I can understand. If I have additional questions after my gisit I can confidently email him and grt a timely response. Highly recommend.
Providence Patient
Clinical Interests
- Abnormal Calcium Score
- Abnormal Coronary Angiography
- Abnormal Stress Test
- Alcohol Septal Ablation
- Anomalies Of The Coronary Artery
- Aortic Valve Disease
- Atherectomy
- Atherosclerosis
- Atherosclerosis Of The Aorta
- Atrial Septal Defect (Asd)
- Atrial Septal Defect (Asd) Closure Device Placement
- Bicuspid Aortic Valve
- Cardiac Angina
- Cardiac Rehabilitation
- Cardiogenic Shock
- Cardiomyopathy
- Carotid Artery Angioplasty
- Carotid Stent
- Chest Pain
- Chronic Total Occlusion
- Claudication
- Congestive Heart Failure (Chf)
- Coronary Angiography
- Coronary Angioplasty
- Coronary Artery Disease
- Coronary Artery Fistula
- Coronary Artery Stent Placement
- Coronary Calcium Scoring
- Directional Atherectomy
- Edwards Sapien Transcatheter Aortic Heart Valve
- Embolic Protection Devices
- Exercise Intolerance
- Extracorporeal Membrane Oxygenation
- Familial Dilated Cardiomyopathy
- Familial Hypertrophic Cardiomyopathy
- Femoral Artery Angioplasty
- Heart Biopsy
- Hypertrophic Cardiomyopathy
- Idiopathic Hypertrophic Subaortic Stenosis
- Intra Aortic Balloon Pump
- Intravascular Ultrasound
- Ischemic Cardiomyopathy
- Laser Atherectomy
- Lithotripsy
- Mechanical Circulatory Support
- Minimally Invasive Aortic Valve Replacement
- Minimally Invasive Mitral Valve Repair
- Mitral Regurgitation
- Mitral Valve Disease
- Mitral Valve Prolapse
- Mitral Valve Regurgitation
- Mitral Valve Stenosis
- Myocardial Infarction (Mi)
- Myocarditis
- Myxoma
- Optical Coherence Tomography
- Paravalvular Leak Repair
- Patent Foramen Ovale
- Patent Foramen Ovale Closure
- Percutaneous Mitral Valve Repair
- Percutaneous Valvuloplasty
- Peripheral Artery Angioplasty
- Peripheral Vascular Diseases
- Prinzmetals Angina
- Pulmonary Artery Stenosis
- Pulmonary Artery Thrombectomy
- Pulmonary Valve Disorders
- Pulmonary Valve Insufficiency
- Pulmonary Valve Stenosis
- Radial Coronary Access
- Refractory Angina
- Replacement Cardiac Valve
- Rheumatic Aortic Regurgitation
- Rheumatic Aortic Stenosis
- Rheumatic Diseases Of Pulmonary Valve
- Rheumatic Heart Disease
- Rheumatic Mitral Regurgitation
- Rheumatic Mitral Stenosis
- Right Heart Catheterization
- Right Heart Failure
- Right Ventricular Hypertrophy
- Rotational Atherectomy
- Shortness Of Breath (Sob)
- Subaortic Stenosis
- Thrombectomy
- Thrombolysis
- Tricuspid Regurgitation
- Tricuspid Valve Disease
- Valve Stenosis
- Valvular Endocarditis
- Venous Thromboembolism
Very good Dr
Providence Patient