Dr. Jeffrey Mark, M.D

Gastroenterologist at The Real Gut Doctor

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Fellowship in Gastroenterology at Rosalind Franklin University of Medicine and Science Graduated: 1997
Residency in Internal Medicine at Northwestern University Graduated: 1995
BS in Neurophysiology at Northwestern University Graduated: 1992
M.D in Gastroenterology at The University Of Illinois College Of Medicine Graduated: 1992
Certified in Medical Acupuncture at UCLA
Certified in Gastroenterology at American Board of Internal Medicine (ABIM)
Certified in Internal Medicine at National Board of Physicians and Surgeons (NPAS)
Certified in Gastroenterology at National Board of Physicians and Surgeons
Certified in Obesity Medicine at American Board of Obesity Medicine
Certified in Functional Medicine at IFMCP
Certified in Anti-Aging and Regenerative Medicine at ABAARM

Joined Aug 2025