About
Dr. Lon Manson leads RootMD Health + Care as a board-certified family physician credentialed through the National Board of Physicians and Surgeons. He grew up in the Willamette Valley of Oregon and earned his undergraduate degree at Gonzaga University before completing his medical degree at the University of Southern California. He then trained for a year as a Head and Neck Surgery intern before pursuing family medicine residency at UC San Diego. After residency, Dr. Manson spent five years as a primary care provider at Scripps Clinic in San Diego, one of the region's most respected health systems.
He holds active medical licenses in both California and Florida. Dr. Manson founded RootMD to deliver the prevention-first, relationship-driven care he believes every patient deserves. He applies a functional medicine framework to every patient he sees, investigating root causes rather than managing symptoms in isolation. His clinical interests center on longevity, health-span maximization, metabolic dysfunction, and caring for patients who have been dismissed by other providers. He settled in Indialantic, his wife's home state, where he and his family live near the coast. When he steps away from the clinic, you'll find him in the ocean or tending his garden.
Education & Training
Undergraduate
Gonzaga University
Medical School
University of Southern California (USC)
Residency
Family Medicine, UC San Diego
Additional Training
Head and Neck Surgery internship (1 year); 5 years as Primary Care Provider at Scripps Clinic, San Diego
Certifications
Conditions Treated
Who is Dr. Manson right for?
Dr. Lon Manson is a strong fit for adults and families who want a physician who investigates root causes rather than treats symptoms alone. Patients managing chronic conditions such as metabolic dysfunction, cardiovascular disease, autoimmune disorders, or ADHD benefit from his functional medicine approach. He also serves patients who have been told nothing is wrong despite ongoing symptoms. Athletes and individuals focused on longevity or weight management find his VO2 max testing, body composition analysis, and individualized exercise planning useful. His small panel size means patients reach him the same day they call.
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Frequently Asked Questions
Dr. Manson focuses on chronic disease, metabolic dysfunction, cardiovascular disease, ADHD, autoimmune disorders, arthritis, leaky gut, food sensitivities, and undiagnosed conditions. He also works with patients pursuing longevity optimization and weight management. His functional medicine framework means he looks for the root cause behind every issue, not just the presenting symptom.
Dr. Manson builds individualized treatment plans that may include pharmaceuticals, dietary changes, nutraceuticals, hormone therapy, compounded prescriptions, osteopathic manipulation, or referrals to acupuncture, massage, or chiropractic care. He draws from a broad spectrum of evidence-based tools and tailors each plan to the individual patient's goals and health history.
Yes. Dr. Manson holds board certification in family medicine through the National Board of Physicians and Surgeons (NBPAS). He completed his residency training at UC San Diego and previously practiced for five years at Scripps Clinic in San Diego.
Dr. Manson earned his medical degree from the University of Southern California and completed a one-year internship in head and neck surgery before his family medicine residency at UC San Diego. He also holds an undergraduate degree from Gonzaga University.
Dr. Manson sees patients via telemedicine across Florida and Tennessee. He holds active licenses in both Florida and California. In-person visits take place at the Indialantic, Florida clinic.
Dr. Manson applies functional medicine principles to every patient, not just those requesting it as an add-on. He uses advanced diagnostics, bedside ultrasound, body composition analysis, and VO2 max testing to identify physiologic dysfunction before disease fully develops. His Concierge Physical, a four-hour exam across two visits, specifically targets the leading causes of chronic disease and early cardiovascular risk.
Yes. Dr. Manson has a particular interest in caring for patients who have been told nothing is wrong despite persistent symptoms. He uses functional medicine diagnostics to investigate the underlying processes driving those symptoms and builds treatment plans around what he finds.
Dr. Manson offers ketamine-assisted psychotherapy (KAP) at RootMD for patients with treatment-resistant depression, chronic suicidality, PTSD, and severe social anxiety. The program runs as a six-session induction with 90-minute sessions in a private room. RootMD also collaborates with Psychiatric Nurse Practitioner Sara Adrados for functional psychiatry services.
Doctor profile last updated April 11, 2026