Dr. Marc Krock is a board-certified cardiologist and interventional cardiologist with over 20 years of experience leading cardiovascular care in North Texas. Fluent in both English and Spanish, he is widely known for his thoughtful, patient-first approach and his leadership in launching heart programs that have shaped the region’s medical landscape.

After beginning his cardiology practice in Plano in 2005, Dr. Krock served as Chief of Cardiology and Director of Peripheral Vascular Disease at The Medical Center of Plano. He was voted Cardiologist of the Year in 2012 by hospital staff, a reflection of his clinical excellence and deep commitment to his patients. Over the years, he has held leadership roles at Medical City Plano, Medical City Frisco, Medical City McKinney, and across Medical City Healthcare.

In 2015, Dr. Krock opened The Heart Smart Group in McKinney with a vision: to build a truly patient-focused practice rooted in mutual respect, education, and personalized care. Today, the Heart Smart Group has a second office in Medical City Frisco where he continues to provide expert diagnostic cardiology while guiding patients through treatment decisions and long-term prevention strategies.

His interests outside of medicine include Bikram yoga, scuba diving, and serving his local community through accessible, practical heart health education.