John Sunew

M.D. | F.A.C.C. | F.S.C.A.I.

    Dr. Sunew is triple-board-certified in Interventional Cardiology, Cardiovascular Disease, and Nuclear Cardiology. He is listed among Top Doctors 2015 in both H Texas Magazine and Houstonia Magazine. He was born in Connecticut and grew up in New York state. Dr. Sunew attended Amherst College in Amherst, Massachusetts and went on to earn his medical degree at State University of New York Health Science Center at Brooklyn in New York. He then completed his internal medicine residency and cardiology fellowship at The George Washington University Medical Center in Washington, DC. He fulfilled his interventional cardiology fellowship at Northwestern University in Chicago, Illinois.

    Prior to moving in 2011 to Katy, Texas, Dr. Sunew practiced interventional cardiology for ten years in northern Virginia. He held many leadership roles with the Inova Health System, including Medical Director of the Cardiac Catheterization Laboratory at Inova Alexandria Hospital and Chairman of the Inova Cardiology Quality Steering Committee. He was also Regional Leader for northern Virginia in the Virginia Heart Attack Coalition. In addition, Dr. Sunew served as Assistant Professor for the Department of Internal Medicine, Virginia Commonwealth University School of Medicine Inova Campus. He was also involved in several clinical research trials and academic publications. 

    Dr. Sunew is able to offer the latest and most innovative treatments in cardiology, interventional cardiology, and peripheral vascular disease. He offers expertise in complex coronary angioplasty procedures and peripheral arterial angioplasty. His non-invasive skills include transesophageal echocardiography and nuclear cardiology. Another unique service offered by Dr. Sunew includes transradial cardiac catheterization. This involves performing the diagnostic and angioplasty procedure through the radial artery at the wrist of the arm, instead of the traditional approach through the femoral artery at the top of the leg. The radial technique has been demonstrated to have equally effective procedural outcomes with the advantages of less bleeding risk and improved comfort for the patient during his or her recover. 


  • Interventional Cardiologist
  • Cardiovascular Disease Specialist

Medical Education

  • SUNY Downstate Medical Center, 1994

Internships & Residency

  • George Washington University - Graduate Medical Education, 1997


  • George Washington University, Cardiology Fellowship, 2000
  • Northwestern University Medical School, Interventional Cardiology Fellowship, 2001

Board Certifications

  • American Board of Internal Medicine, Internal Medicine
  • American Board of Internal Medicine, Cardiovascular Disease
  • American Board of Internal Medicine, Interventional Cardiology


  • American College of Cardiology Fellow
  • Fellow of the Society for Cardiovascular Angiography and Interventions

Affiliated Centers

  • Houston Methodist Continuing Care Hospital
  • Houston Methodist West Hospital
  • Memorial Hermann Katy Hospital
  • Memorial Hermann Memorial City Medical Center