Dr. Andreas Thyssen

Dr. Andreas Thyssen is a board-certified physician in Internal Medicine, Pediatrics, Lifestyle Medicine, and Pediatric Hospital Medicine. He founded Maine Street Medical to offer a different kind of care—one where you’re truly known, where visits aren’t rushed, and where the focus is on preventing illness, not just reacting to it.

After over a decade in academic hospitals caring for patients in health crises, Dr. Thyssen saw how much of our healthcare system focuses on managing complications—rather than helping people avoid them in the first place. He started this practice to change that.

Dr. Thyssen believes that the best healthcare happens when you have time to talk, space to reflect, and a doctor who listens. He partners with each patient to create a personalized plan built around their values, goals, and lifestyle—not just lab results or quick fixes. He’s also a certified health and wellness coach, using coaching tools to support behavior change and self-directed healing.

Originally from the Midwest, Dr. Thyssen has called Brunswick home since 2013, where he lives with his wife and four children. Outside of work, he’s a triathlete, soccer player, snowboarder, and lover of all things Maine. He looks forward to getting to know you—not just your medical history, but what matters most to you.