Dr. John S. Tsakonas, M.D., a graduate of the School of Engineering of Columbia University in New York, received his medical education from the State University of New York at Syracuse. He completed his internal medicine and cardiology training at the George Washington University Hospital, Washington, D.C.
Dr. Tsakonas is certified by the National Board of Medical Examiners, the American Board of Internal Medicine and the Subspecialty Boards of Cardiovascular Disease and cardiac CT angiography.
Dr. John S. Tsakonas, M.D., a graduate of the School of Engineering of Columbia University in New York, received his medical education from the State University of New York at Syracuse. He completed his internal medicine and cardiology training at the George Washington University Hospital, Washington, D.C.
Dr. Tsakonas is certified by the National Board of Medical Examiners, the American Board of Internal Medicine and the Subspecialty Boards of Cardiovascular Disease and cardiac CT angiography.
The reviews listed below were collected independently of Cardiovascular Consultants through rater8. Each review represents an authentic and verified patient experience.
Dr Tsakonas is friendly, professional and knowledgeable. I’ve had several cardio docs over the years and he is by far my favorite.
(4 days ago)
Feb-2026
The WHOLE staff gets 5 stars. I always leave this office feeling like I just visited my church family. Everyone is very pleasant and happy. Good medical results always makes my day and happiness is a thousand pluses!!!!!!!!!!!
(4 days ago)
Feb-2026
Dr is friendly and professional. He listened to my concerns. He makes me feel comfortable and at ease.
(1 week ago)
Feb-2026
I drive over an hour facing traffic on the 405 and the 101 freeways to see Dr. Tsakonas. Been his patient for 13 years and want to continue being under his care.
(2 weeks ago)
Feb-2026
Dr. Tsakonas and the nurse made me feel comfortable and they already had my medical records, so I didn’t have to explain much .
(3 weeks ago)
Feb-2026
Great doctor with a great supportive team.
(3 weeks ago)
Feb-2026
Professional, polite, listened, and welcoming. As it was our first meeting, before making any conclusions on my condition, Dr. Tsakonas is sending me for blood work, and requesting tests on my heart. He is asking Insurance to approve a timely followup appointment. My entire experience with the office staff put me at ease. 😃
(1 month ago)
Jan-2026
Thanks John your awesome!
(1 month ago)
Jan-2026
Straight ahead useful and common sense approach. Great doctor.
(1 month ago)
Jan-2026
He is the Best provider he is on top of everything. Best manors too so kind. Very knowledgeable so blessed that he’s my Dr.
Dr. John S. Tsakonas, M.D., a graduate of the School of Engineering of Columbia University in New York, received his medical education from the State University of New York at Syracuse. He completed his internal medicine and cardiology training at the George Washington University Hospital, Washington, D.C.
He remained at George Washington as a Clinical Instructor of Medicine completing an extra year of invasive and interventional cardiology. Dr. Tsakonas is an Assistant Clinical Professor at UCLA, and is a member of the Attending Clinical Faculty in Cardiac Catheterization and Intervention at the Wadsworth VA Hospital in Los Angeles.
Dr. Tsakonas is certified by the National Board of Medical Examiners, the American Board of Internal Medicine and the Subspecialty Boards of Cardiovascular Disease and cardiac CT angiography. He is also a Fellow of the American College of Cardiology and Fellow of the Society of Cardiac CT.
Dr Tsakonas is friendly, professional and knowledgeable. I’ve had several cardio docs over the years and he is by far my favorite.
The WHOLE staff gets 5 stars. I always leave this office feeling like I just visited my church family. Everyone is very pleasant and happy. Good medical results always makes my day and happiness is a thousand pluses!!!!!!!!!!!
Dr is friendly and professional. He listened to my concerns. He makes me feel comfortable and at ease.
I drive over an hour facing traffic on the 405 and the 101 freeways to see Dr. Tsakonas. Been his patient for 13 years and want to continue being under his care.
Dr. Tsakonas and the nurse made me feel comfortable and they already had my medical records, so I didn’t have to explain much .
Great doctor with a great supportive team.
Professional, polite, listened, and welcoming. As it was our first meeting, before making any conclusions on my condition, Dr. Tsakonas is sending me for blood work, and requesting tests on my heart. He is asking Insurance to approve a timely followup appointment. My entire experience with the office staff put me at ease. 😃
Thanks John your awesome!
Straight ahead useful and common sense approach. Great doctor.
He is the Best provider he is on top of everything. Best manors too so kind. Very knowledgeable so blessed that he’s my Dr.