About
Dr. John-Paul Jansen grew up in rural Quebec before moving to the United States for college at Christendom College. He earned his medical degree from West Virginia University School of Medicine and completed his Internal Medicine residency at Kansas University. He holds board certification in Internal Medicine through the American Board of Internal Medicine.
Before founding Fiat Medical, Dr. Jansen practiced as a hospitalist at multiple large hospital systems in the Denver metropolitan area. He relocated to Front Royal in 2017 and worked at Winchester Medical Center before co-founding Fiat Medical with his father in 2022. He sees patients at both the Front Royal and Manassas offices. He lives in Front Royal with his wife Anne and their five children.
Education & Training
Undergraduate
Christendom College
Medical School
West Virginia University School of Medicine
Residency
Internal Medicine, Kansas University
Certifications
Conditions Treated
Who is Dr. Jansen right for?
Dr. Jansen is a strong fit for adults seeking a long-term relationship with a board-certified internist. Patients managing chronic conditions benefit from his internal medicine background and unhurried 60-minute visits. His hospital medicine experience makes him well-suited for patients navigating complex or multi-system health concerns. Adults at any stage of life who want proactive, whole-person primary care will find a good match in Dr. Jansen.
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Frequently Asked Questions
Dr. Jansen holds board certification in Internal Medicine through the American Board of Internal Medicine. He completed his Internal Medicine residency at Kansas University before entering clinical practice.
Dr. Jansen sees adult patients across a wide range of primary care needs. His internal medicine training makes him well-suited for chronic disease management, preventive care, and complex medical concerns.
Dr. Jansen earned his medical degree from West Virginia University School of Medicine and completed his residency in Internal Medicine at Kansas University. He then worked as a hospitalist at multiple hospital systems in the Denver metropolitan area before relocating to Virginia.
Dr. Jansen sees patients at both the Front Royal and Manassas locations.
Dr. Jansen co-founded Fiat Medical in 2022 alongside his father, Dr. Donald Jansen. The practice reflects his commitment to treating patients as whole people rather than as a set of symptoms or diagnoses.
Yes. Dr. Jansen practiced as a hospitalist at multiple large hospital systems in the Denver area before transitioning to direct primary care. That background informs how he manages complex cases and coordinates care for his patients.
Doctor profile last updated March 21, 2026