HomeSan Antonio, TXBest Cardiologists in San Antonio

Best Cardiologists in San Antonio

Below is a list of the top and leading Cardiologists in San Antonio. To help you find the best cardiologist located near you in San Antonio, our team at Kev’s Best put together our own list based on this rating points list.

The top rated Cardiologists in San Antonio are:

  • Mark Colligan – Heart Clinic of San Antonio
  • Ildiko Agoston – UT Health San Antonio
  • Guillermo Reyes – Cardiology of San Antonio
  • Gregory Buser – Heart and Vascular Institute of Texas

Heart Clinic of San Antonio

Mark Colligan
Mark Colligan – Heart Clinic of San Antonio

Dr. Mark Colligan has been named a “Top Doctor” by US News & World Report. He is board certified in internal medicine, cardiovascular disease, nuclear cardiology and echocardiography. A fellow of the American College of Cardiology, he enjoys all aspects of heart care, from treating complex cases to prevention and wellness. He especially enjoys developing long-term relationships with his patients.

Personal Affiliations: American College of Cardiology; American Heart Association; American Society of Echocardiography; National Lipid Association; Society for Cardiovascular CT; Bexar County Medical Society; Heart Rhythm Society; Texas Medical Association


Cardiac Imaging and Testing, General Cardiology, Heart Rhythm/Electrophysiology, Interventional Cardiology, Peripheral Vascular Disease


Address: 502 Madison Oak Dr, San Antonio, TX 78258
Phone: (210) 483-8883


Best doctors and staff” – Dick Parchem

UT Health San Antonio

Ildiko Agoston
Ildiko Agoston – UT Health San Antonio

Ildiko Agoston, M.D. received her degree in 1996 at Semmelweis University of Medicine in Budapest, Hungary. She completed her internal medicine residency training in Philadelphia and completed her fellowship training in cardiology and adult echocardiography at the University of Texas Medical Branch in Galveston, Texas. She trained in cardiac MRI and cardiac CT. She has held academic appointments at UTMB Galveston and Baylor College of Medicine. While at Baylor College of Medicine, Dr. Agoston developed a Women’s Center promoting comprehensive evidence-based care.

She relocated to San Antonio with her family and sees patients at UT Health Cardiology in the Medical Arts and Research Center (MARC). She serves as the Medical Director of the cardiology practice at the MARC. She passionately developed yet another evidence-based women’s program located at the MARC called The Women’s Comprehensive Health Institute.


Cardiology, Cardiothoracic Surgery, General Surgery, Neurology, Orthopaedics, Physical Therapy, Pain Consultants, Pulmonology, Rheumatology, Vascular Surgery


Address: 8300 Floyd Curl Dr #3b, San Antonio, TX 78229
Phone: (210) 450-4888


Great Staff and Top Notch Doctors” – Shirley

Cardiology of San Antonio

Guillermo Reyes
Guillermo Reyes – Cardiology of San Antonio

Dr. Guillermo Reyes received his Fellowship and Graduate studies from Baylor College of Medicine and Affiliated Hospitals. He completed his undergraduate studies at Texas A&M University. He has been honored as a Diplomat with American Board of Cardiovascular Diseases and is affiliated with many local hospitals as he strives to stay current with the changing cardiovascular technologies. Throughout his career, Dr. Reyes has broadened his knowledge base by writing publications. His bilingual ability further enhances his value to his peers and his patients.


Implantation Pacemakers and Defibrillators; Thrombolytic Infusion; Intra-Coronary Ultrasound and Flow Reserve; Coronary Angiography and Intervention; Head-up tilt table test; Peripheral angiography and stenting; Interventions (Cath Lab); Endomyocardial Biopsy; Cardioversion (emergency and elective); Vena Cava Filter Insertion; Intubation


Address: 8093 Eckhert Rd, San Antonio, TX 78240
Phone: (210) 949-1300


Very personable and concerned. Always answered my questions thoroughly. This is the first cardiologist I’ve ever had that has seen me at every appointment, with others I’ve seen the nurse most times. Staff is kind and courteous, Janae Esparza helped me tremendously with my sleep apnea testing and acquiring my CPAP machine.” – Pappas Steve

Heart and Vascular Institute of Texas

Gregory Buser
Gregory Buser – Heart and Vascular Institute of Texas

Dr. Gregory Buser is board-certified in internal medicine and cardiovascular disease. Dr. Buser is a highly respected interventional cardiologist with decades of experience in treating a range of cardiovascular conditions. He also has been an investigator in a number of cardiac-related research projects, which have been published in prestigious international journals.

Professional Memberships: American College of Cardiology; North American Society of Electrophysiology and Pacing


Cardiac Imaging and Testing, General Cardiology, Peripheral Vascular Disease, Heart Rhythm/Electrophysiology, Interventional Cardiology


Address: 1933 NE Interstate 410 Loop, San Antonio, TX 78217
Phone: (210) 804-6000


So Beautiful and They’re so Friendly” – Virginia Maciel