About
Dr. Andreas Thyssen holds board certifications in Internal Medicine, Pediatrics, and Lifestyle Medicine. He also works as a certified health and wellness coach. After more than a decade in academic hospital medicine, he founded Maine Street Medical to build something different: unhurried, relationship-based care focused on optimizing healthspan.
Dr. Thyssen integrates evidence-based medicine with practical behavior change strategies. He believes the best medicine happens when there is time to listen carefully, think deeply, and plan thoughtfully. His clinical focus centers on prevention, longevity, metabolic health, and chronic disease reversal. He has called Brunswick home since 2013, where he lives with his wife and four children. Outside medicine, he competes in triathlons, plays soccer, snowboards, and studies performance and resilience.
Education & Training
Additional Training
Certified Health and Wellness Coach; Board Certified in Lifestyle Medicine
Certifications
Conditions Treated
Who is Dr. Thyssen right for?
Dr. Thyssen is well suited for adults and families who want a physician focused on prevention and long-term health. Patients managing diabetes, cardiovascular disease, or obesity benefit from his Lifestyle Medicine training and coaching background. He also sees children and newborns. Patients who want a doctor to help them understand root causes and build lasting health habits will find his approach particularly valuable.
Similar Doctors Nearby
Dr. Allison ButtarazziMD
Internal Medicinechronic disease, cardiovascular disease, type 2 diabetes +1 more
Dr. Kathryn BrouilletteMD
Internal Medicinechronic disease, substance use disorder, end of life conditions
Dr. Alyssa GoodwinMD
PediatricsADHD, anxiety, depression +6 more
Frequently Asked Questions
Dr. Thyssen focuses on prevention, longevity, and the reversal of chronic disease through lifestyle change. He treats adults and children and brings special expertise in metabolic health, cardiovascular disease, diabetes, and obesity. His work as a certified health and wellness coach shapes how he partners with patients on behavior change.
Yes. Dr. Thyssen holds board certifications in Internal Medicine, Pediatrics, and Lifestyle Medicine. He is also a certified health and wellness coach.
Yes. Dr. Thyssen is board certified in both Internal Medicine and Pediatrics. He sees patients of all ages, from newborns through adults. He and Dr. Brouillette also offer prenatal meet-and-greet visits for expectant parents.
Dr. Thyssen spent more than a decade in academic hospitals before founding Maine Street Medical. He wanted to build a practice with time to listen, think, and plan. His goal was care focused on optimizing healthspan rather than simply reacting to illness.
Dr. Thyssen evaluates nutrition, exercise, sleep, stress, and relationships before considering medications. He uses his Lifestyle Medicine board certification and health coaching training to build practical, sustainable plans with each patient. The Lifestyle Medicine programming included in Maine Street Medical's membership reflects this approach.
Yes. Dr. Thyssen has lived in Brunswick since 2013. He raises his family there and brings a genuine investment in the health of the local community.
Dr. Thyssen treats chronic conditions including type 2 diabetes, cardiovascular disease, and obesity. He focuses on reversing these conditions through sustained lifestyle change wherever possible, rather than relying on medication management alone.
Doctor profile last updated June 11, 2026