About
Dr. Armin Marefat is a board-certified internist and gastroenterologist practicing in Wilmington, Delaware. He earned his Bachelor of Arts in Biological Sciences from the University of Delaware in 2001. He then completed his Doctorate of Osteopathic Medicine at the Philadelphia College of Osteopathic Medicine in 2005. His internship and internal medicine residency both took place at Christiana Care Health System in Newark, Delaware. He went on to complete a gastroenterology fellowship at the University of Medicine and Dentistry of New Jersey in Stratford, finishing in 2011. He holds certifications from the American Board of Internal Medicine, the American Osteopathic Board of Internal Medicine, and the American Osteopathic Board of Internal Medicine in Gastroenterology. The Delaware Institute of Medical Education Scholarship recognized his academic achievements early in his training. He speaks both English and Farsi.
Dr. Marefat builds his practice on the osteopathic principle that mind and body must work in concert. He is passionate about gut health, particularly the role of the microbiome in mental and physical wellness. He helps patients use targeted dietary approaches to cultivate a healthier gut and address underlying medical ailments. Outside the clinic, he enjoys golf, weightlifting, mountain biking, and playing the guitar.
Education & Training
Undergraduate
University of Delaware, Newark, DE — Bachelor of Arts, Biological Sciences, 2001
Medical School
Philadelphia College of Osteopathic Medicine, Philadelphia, PA — Doctorate of Osteopathic Medicine
Residency
Internal Medicine, Christiana Care Health System, Newark, DE, 2006-2008
Fellowship
Gastroenterology, University of Medicine and Dentistry of New Jersey, Stratford, NJ, 2008-2011
Additional Training
Internship: Christiana Care Health System, Newark, DE, 2005-2006
Certifications
Languages
Farsi
Conditions Treated
Who is Dr. Marefat right for?
Dr. Marefat is a strong fit for adults seeking a physician who treats the whole person, not just isolated symptoms. Patients dealing with gastrointestinal disorders or gut microbiome imbalances will find his dual training in internal medicine and gastroenterology especially relevant. He works well with patients motivated to use diet and lifestyle as tools for improving their health. Those who value a collaborative, trust-driven relationship with their physician will feel at home in his practice.
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Frequently Asked Questions
Dr. Marefat treats a broad range of adult health concerns through his dual training in internal medicine and gastroenterology. He has particular expertise in gastrointestinal disorders and gut microbiome imbalances. He also helps patients manage chronic conditions like type 2 diabetes, high cholesterol, and hypertension through the MDVIP Wellness Program.
Yes. Dr. Marefat holds board certifications from the American Board of Internal Medicine, the American Osteopathic Board of Internal Medicine, and the American Osteopathic Board of Internal Medicine in Gastroenterology. These credentials reflect his training in both internal medicine and digestive health.
Dr. Marefat trained at several institutions in the region. He completed his internship and internal medicine residency at Christiana Care Health System in Newark, Delaware. He then completed his gastroenterology fellowship at the University of Medicine and Dentistry of New Jersey in Stratford, finishing in 2011.
Dr. Marefat focuses on the connection between the gut microbiome, physical health, and mental well-being. He helps patients develop dietary strategies that build a healthier microbiome. He views this approach as a way to address many medical ailments at their root rather than simply managing symptoms.
As a Doctor of Osteopathic Medicine, Dr. Marefat treats the mind and body as interconnected. He applies this philosophy to every patient interaction, looking for how physical symptoms and mental health influence each other. This foundation guides his preventive and treatment strategies across both internal medicine and gastroenterology.
Yes. Dr. Marefat speaks Farsi in addition to English. This allows him to serve Farsi-speaking patients in the Wilmington area more comfortably.
Dr. Marefat believes the interpersonal relationship between patient and physician is central to achieving better health outcomes. He views trust and open communication as essential tools for gathering the information needed to guide care. He takes a team approach, working alongside his patients rather than directing them.
Dr. Marefat holds hospital affiliation with Christiana Care Health System in Delaware. This affiliation supports continuity of care when patients need hospital-level services.
Doctor profile last updated April 11, 2026