About
Dr. Mark Matthew Neimat is a board-certified internal medicine physician with 15 years of experience in both inpatient and outpatient care. He completed his Internal Medicine residency at the Icahn School of Medicine at Mount Sinai in New York, training in high-volume, high-complexity environments that demanded diagnostic precision and broad clinical skill.
Dr. Neimat holds additional training in point-of-care ultrasound and wilderness medicine. He is an active member of both the American College of Physicians and the American College of Lifestyle Medicine. His clinical interests span healthspan, longevity medicine, functional medicine, and athletic performance. He is passionate about metabolic health, insulin resistance, cardiovascular risk reduction, and sleep optimization. Dr. Neimat has lived in Jackson, Wyoming for over a decade. He skis the Tetons backcountry in winter, trail runs in summer, and mountain bikes in fall. That firsthand understanding of physical life in the mountains shapes how he thinks about health, capability, and what patients stand to lose if disease goes unchecked too long.
Education & Training
Medical School
The George Washington University School of Medicine, Washington, D.C.
Residency
Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, N.Y.
Additional Training
Point-of-Care Ultrasound; Wilderness Medicine
Certifications
Conditions Treated
Who is Dr. Neimat right for?
Dr. Neimat works best with active adults who want to stay physically capable as they age. Patients managing metabolic concerns such as insulin resistance, dyslipidemia, or obesity benefit from his early-intervention approach. He is a strong fit for people with cardiovascular risk factors or a family history of chronic disease who want a proactive plan. Athletes and outdoor enthusiasts seeking performance optimization and longevity strategy find his clinical focus well-matched to their goals.
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Frequently Asked Questions
Dr. Neimat treats metabolic disease, cardiovascular disease, insulin resistance, dyslipidemia, and obesity. He also addresses sleep disorders, cognitive decline risk, and organ dysfunction. His approach focuses on identifying and intervening on these conditions early, well before they require crisis management.
Yes. Dr. Neimat holds board certification in Internal Medicine. He trained at the Icahn School of Medicine at Mount Sinai and brings 15 years of experience across inpatient and outpatient settings.
Dr. Neimat focuses on root causes rather than reactive treatment. He intervenes early, monitors continuously, and builds a longitudinal understanding of each patient's physiology. His goal is a life that stays disease-free, physically capable, and mentally present for as long as possible.
Yes. Athletic performance optimization is one of Dr. Neimat's core clinical interests. He works with active adults on metabolic health, recovery, and long-term physical resilience. His personal experience skiing, trail running, and mountain biking informs how he approaches performance and longevity for active patients.
Dr. Neimat earned his M.D. from The George Washington University School of Medicine. He completed his Internal Medicine residency at the Icahn School of Medicine at Mount Sinai in New York. He also holds additional training in point-of-care ultrasound and wilderness medicine.
Yes. Dr. Neimat integrates functional medicine principles alongside internal medicine diagnostics. He looks at the underlying physiologic drivers of disease and works with patients on nutrition, exercise, sleep, and stress management as part of a tailored health plan.
Dr. Neimat emphasizes cancer prevention, cardiovascular risk reduction, and cognitive decline prevention. He uses advanced physiologic profiling and integrates current research to build proactive strategies for each patient. His focus is on extending healthspan, not just lifespan.
Yes. Dr. Neimat offers in-home evaluation and treatment for acute issues. Members can also reach him via telehealth or in-person visits, depending on their needs.
Doctor profile last updated October 31, 2026