About
Dr. Dariusz Kostrzewa has practiced medicine in Narragansett for 21 years, building his career through solo practice, Coastal Medical, and Brown Health before returning to independent practice with Alaga Health in November 2025. He specializes in Family Medicine, Preventive Medicine, and Functional Medicine. Over the years, he expanded his training to include alternative medicine and homeopathy.
Dr. Kostrzewa is passionate about food as medicine and brings practical, specific dietary guidance to every patient relationship. Fitness coaching holds a central place in his clinical work; he views movement as one of the most powerful tools for long-term health. He also offers herbal therapies and psychedelic treatment support within legal parameters. His personal love of hiking, scuba diving, and the outdoors informs his conviction that staying connected to the natural world supports genuine well-being.
Education & Training
Additional Training
Alternative medicine and homeopathy training
Who is Dr. Kostrzewa right for?
Dr. Kostrzewa is a strong fit for patients who want a comprehensive, whole-person approach to health. Adults focused on longevity, disease prevention, and resilience benefit from his Health Span Assessments and functional medicine expertise. Patients curious about nutrition, fitness, herbal therapies, or alternative medicine will find his expanded skill set valuable. He also suits patients who want a physician willing to explore unconventional but evidence-informed treatment options.
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Frequently Asked Questions
Dr. Kostrzewa specializes in Family Medicine, Preventive Medicine, and Functional Medicine. He places particular emphasis on longevity assessments, nutrition as medicine, and fitness coaching. He also offers alternative medicine, homeopathy, herbal therapies, and psychedelic treatment support within legal parameters.
Dr. Kostrzewa focuses on prevention, resilience, and long-term vitality rather than treating illness alone. He conducts in-depth Health Span Assessments covering cardiovascular health, body composition, fitness, sleep, and cancer risks. His goal is to help patients build the biological foundation for a longer, healthier life.
Yes, Dr. Kostrzewa trained in alternative medicine and homeopathy and incorporates both into his practice. He offers herbal therapies and, within legal parameters, psychedelic treatment support. Patients interested in integrative or complementary approaches will find a knowledgeable and experienced guide in Dr. Kostrzewa.
Dr. Kostrzewa treats food as medicine and provides clear, practical dietary recommendations tailored to each patient. Fitness coaching forms a cornerstone of his clinical work. He believes movement ranks among the most powerful tools available for maintaining health and preventing disease.
Dr. Kostrzewa has practiced medicine in Narragansett for 21 years. He began in solo practice, then joined Coastal Medical, and later worked with Brown Health before returning to independent practice with Alaga Health in November 2025.
Dr. Kostrzewa practices in Family Medicine, Preventive Medicine, and Functional Medicine, with additional training in alternative medicine and homeopathy. His clinical background reflects more than two decades of practice and a sustained commitment to expanding his expertise.
Dr. Kostrzewa conducts yearly Health Span Assessments for his patients. These comprehensive evaluations cover diet, fitness, sleep, emotional well-being, cardiovascular health, cancer risks, body composition, muscle strength, and VO2 max. The assessment gives patients a detailed picture of where they stand and a clear path forward.
Doctor profile last updated October 31, 2026