Thomas A. Lalonde, MD

Thomas A. Lalonde, MD

Interventional Cardiology, Cardiology, Internal Medicine
Languages Spoken


Thomas A. LaLonde, MD, is an interventional cardiologist at Ascension St. John in Detroit, Michigan. He performs procedures to restore blood flow to the heart. Dr. LaLonde starts by listening to understand you and your health concerns. He works with our multidisciplinary cardiologists to create a care plan that's right for you. Our cardiovascular specialists are part of an integrated, national network of heart care, sharing best practices and offering evaluation and treatment of the most complex heart conditions.

There's a lot to think about when deciding to have heart surgery. Dr. LaLonde is here for you. He is part of our cardiac surgery care team, specializing in minimally invasive heart and vascular surgery. He performs interventional cardiology procedures to help prevent heart attack and stroke, including opening clogged coronary arteries (angioplasty, with balloon or stent).

A widely published author in the medical literature, Dr. LaLonde remains very active in interventional cardiovascular research.
Meet Thomas A. Lalonde, MD



  • Wayne State University School of Medicine


  • Ascension St John Hospital


  • Ascension St John Hospital


  • Ascension St John Hospital


Hospital Affiliations

  • Ascension St. John Hospital


  • The American Board of Internal Medicine - Cardiovascular Disease
  • The American Board of Internal Medicine - Internal Medicine
  • The American Board of Internal Medicine - Interventional Cardiology


Thomas A. Lalonde, MD offers services at multiple Michigan locations. Contact your preferred location to book an appointment.
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Why Ascension
Ascension doctors are committed to getting to know you. They take time for real back-and-forth conversations with you so they can understand all aspects of you and your life. Because great care starts with seeing your whole picture.