About
Merit F. Gadallah, MD earned his Doctorate of Medicine with honors from Cairo University in Cairo, Egypt in 1980. He completed his internship at Wayne State University in Detroit, then finished an Internal Medicine residency at Mercy Hospital, a University of Illinois affiliate in Chicago. He went on to complete a fellowship in Nephrology and Hypertension at Kaiser Foundation Hospital in Los Angeles.
Dr. Gadallah holds board certification from both the American Board of Internal Medicine and the American Board of Nephrology. His clinical expertise covers all aspects of kidney disease and hypertension, with deep interests in cardiovascular and preventive medicine. He spent the majority of his career as a professor of medicine, holding faculty positions at the University of Southern California, Louisiana State University, and the University of Florida - where he served as Professor and Chief of the Division of Nephrology and Hypertension. He earned the Best Teaching Professor of the Year Award at USC and multiple research honors at the University of Florida. NCH Healthcare System named him Physician of the Year in 2016. He currently serves as Medical Director at American Renal Associates in both Naples and Naples South. His guiding principle is patient advocacy paired with thorough, compassionate care.
Education & Training
Medical School
Cairo University, Cairo, Egypt - Doctorate of Medicine, 1980 (Graduated with Honors)
Residency
Internal Medicine, Mercy Hospital, University of Illinois Affiliate, Chicago, IL, 1982-1984
Fellowship
Nephrology and Hypertension, Kaiser Foundation Hospital, Los Angeles, CA, 1984-1986
Additional Training
Internship: Wayne State University, Detroit, MI, 1981-1982
Certifications
Conditions Treated
Who is Dr. Gadallah right for?
Dr. Gadallah is an excellent fit for adults managing kidney disease, hypertension, or cardiovascular conditions. Patients who want direct, personal access to a physician with deep subspecialty training benefit most from his approach. He works well with those navigating complex or chronic conditions who want one physician overseeing their care. Patients who value same-day access and after-hours communication find his concierge model particularly practical.
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Frequently Asked Questions
Dr. Gadallah specializes in kidney disease, hypertension, cardiovascular medicine, and preventive care. He also provides comprehensive internal medicine for adults managing chronic conditions. His dual board certifications in Internal Medicine and Nephrology give him a depth of expertise that spans multiple related specialties.
Yes. Dr. Gadallah holds board certifications from both the American Board of Internal Medicine and the American Board of Nephrology. He earned these credentials after completing his residency and a dedicated nephrology and hypertension fellowship at Kaiser Foundation Hospital in Los Angeles.
Dr. Gadallah spent much of his career as a professor of medicine. He held faculty positions at the University of Southern California, Louisiana State University, and the University of Florida. At the University of Florida, he served as Professor and Chief of the Division of Nephrology and Hypertension. USC honored him with the Best Teaching Professor of the Year Award.
Dr. Gadallah earned his Doctorate of Medicine with honors from Cairo University in Egypt in 1980. He completed his internship at Wayne State University in Detroit and his Internal Medicine residency at Mercy Hospital in Chicago. He then trained in Nephrology and Hypertension through a fellowship at Kaiser Foundation Hospital in Los Angeles.
Dr. Gadallah sees every patient personally. His practice does not use nurse practitioners or physician assistants. This direct-physician model ensures that Dr. Gadallah maintains a hands-on relationship with each member throughout their care.
Yes. Members reach Dr. Gadallah directly by phone after hours and on weekends. This level of access is a core part of how he practices patient advocacy and supports continuity of care.
Dr. Gadallah's practice connects to both Naples Community Hospital and North Collier Hospital. He also maintains strong specialist relationships throughout Southwest Florida to support patients with complex needs.
Dr. Gadallah has received multiple honors throughout his career. NCH Healthcare System named him Physician of the Year in 2016. USC recognized him with the Best Teaching Professor of the Year Award, and the University of Florida granted him multiple research distinctions.
Doctor profile last updated March 21, 2026