About
Dr. John Grimsley earned his Doctor of Medicine from Georgetown University School of Medicine, where he also completed a Master of Science in Biophysics and Physiology. He holds two additional degrees from George Mason University, an MS in Biology and a BS in Biology. His residency training in Family Medicine took place at Fairfax Family Practice through Inova and VCU. Before medical school, Dr. Grimsley worked in biotech at Human Genome Sciences in their Oncology division. He then opened Vantage Primary Care before co-founding Summit Direct Care with his wife, Diana.
Dr. Grimsley holds board certification from the American Board of Family Medicine and a license from the Virginia Board of Pharmacy. He practices broad-spectrum family medicine across all ages. His clinical focus centers on musculoskeletal medicine, nutrition, lifestyle medicine, and reversing chronic disease through root-cause analysis. He is passionate about longevity, metabolic health, sleep, and preventive care. A father of five and a Northern Virginia native, he developed his interest in human physiology through competitive wrestling, football, and boxing in his youth.
Education & Training
Undergraduate
BS, Biology, George Mason University
Medical School
Doctor of Medicine, Georgetown University School of Medicine
Residency
Family Medicine, Fairfax Family Practice (Inova and VCU)
Additional Training
MS, Biophysics & Physiology, Georgetown University; MS, Biology, George Mason University
Certifications
Conditions Treated
Who is Dr. Grimsley right for?
Dr. Grimsley is a strong fit for patients who want to address chronic conditions at their root cause. Adults managing metabolic issues, sleep concerns, or musculoskeletal pain benefit from his clinical focus. Patients interested in longevity and preventive care will find his approach particularly well-matched to their goals. Families seeking a physician who treats all ages, from children to adults, will find continuity of care under his practice.
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Frequently Asked Questions
Dr. Grimsley focuses on musculoskeletal medicine, metabolic health, chronic disease management, and preventive care. He takes a root-cause approach, drawing on lifestyle medicine and functional medicine alongside standard family medicine. He also addresses sleep health and longevity as core parts of his clinical work.
Yes, Dr. Grimsley practices broad-spectrum family medicine across all age groups. He sees children, adolescents, and adults. Families can consolidate care under a single physician.
Dr. Grimsley completed his Family Medicine residency at Fairfax Family Practice through Inova and VCU. He trained locally in Northern Virginia, where he has built his career.
Yes, Dr. Grimsley holds board certification from the American Board of Family Medicine. He also holds a license from the Virginia Board of Pharmacy, which supports the in-house pharmacy at Summit Direct Care.
Dr. Grimsley earned his MD from Georgetown University School of Medicine and an MS in Biophysics and Physiology from Georgetown as well. He also holds an MS in Biology and a BS in Biology from George Mason University. Before medical school, he worked in biotech at Human Genome Sciences in their Oncology division.
Dr. Grimsley uses root-cause analysis to understand what drives a patient's condition. He integrates lifestyle medicine, functional medicine, and allopathic medicine to build individualized care plans. His goal is to reverse chronic disease rather than simply manage symptoms.
Dr. Grimsley co-founded Summit Direct Care alongside Dr. Mary Alling. Before Summit, he opened and operated Vantage Primary Care in Northern Virginia.
Doctor profile last updated March 21, 2026