One Tree Integrative Medicine
Jamie Lewallen, PA-C PhD
Dr. Jamie spent 20 years practicing family medicine in the Colorado mountain communities she grew up in. During that time she became a skilled clinician — and developed a clear-eyed view of what conventional medicine doesn’t investigate well: the upstream causes that drive chronic, complex conditions that keep coming back regardless of treatment.
In 2019, after completing her PhD in Integrative Medicine, she opened One Tree — built specifically for patients who had been through the system and were still looking for real answers. She combines 20 years of clinical judgment with a broader set of investigative tools: bioidentical hormones, peptide therapy, neural therapy, biofeedback, gut health protocols, B.E.S.T., HBLU, and more.
+20 Years
Family medicine practice
PhD
Integrative Medicine, Quantum University, 2019
PA-C
Master of Medical Science, Red Rocks College
📍 Born & raised in Evergreen, CO
Education & Training
Credentials
BA, Psychology
Occidental College, Los Angeles
Graduate Studies — Pre-Med
Boston College & Yale University
Master of Medical Science (MMS)
Red Rocks College · Physician Assistant (PA-C)
20 Years Family Medicine
Practicing in Colorado mountain communities
PhD, Integrative Medicine
Quantum University · 2019
Certification — Peptide Therapy
Advanced clinical training
Certification — Neural Therapy
European methodology
Board Certification (in progress)
Longevity & Anti-Aging Medicine
“It is essential that my clients get the personalized recommendations that match their needs. Rather than do things the typical way, I’ve created a system designed around clients’ needs.”
Those 20 years in conventional practice weren’t a detour — they’re the foundation. Dr. Jamie PA-C, PhD understands how the conventional system works, where it excels, and precisely where it reaches its limits. That clinical grounding is what makes the integrative work at One Tree rigorous rather than speculative.
She trained in peptide therapy and neural therapy after her PhD, and is currently working toward board certification in Longevity and Anti-Aging Medicine. One Tree sees patients in-person and via telehealth across Colorado.
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“After three years of being told my labs were normal, Jamie found the root cause of my fatigue in two appointments. For the first time in years I actually feel like myself again.”
One Tree Patient · Denver, CO · Chronic Fatigue & Autoimmune
*Patient experience. Results vary. This is not a medical claim.
Ready to work with a practitioner who actually has time to listen?
Your free 40-minute consultation is the starting point — no forms, no commitment, no pressure. Just a direct conversation about what you’ve been through and whether One Tree is the right fit.