Meet Erin Leffel, PA-C, IFM Certified
Erin is an intensive and wellness provider at Sanctuary Functional Medicine in Franklin, TN. After obtaining her Master of Physician Assistant Studies from Drexel University in Philadelphia, PA, she began her journey in healthcare, specializing in emergency medicine. Working in a variety of ERs over the past 8+ years required her to regularly care for patients suffering the debilitating and sometimes lethal effects of preventable chronic disease that conventional medicine had failed to manage.
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This fostered a strong desire to shift her career into a setting that would allow her to partner with patients in their health journey by addressing the root cause of their symptoms and preventing the development of chronic disease.
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Having obtained her certification from the Institute of Functional Medicine, along with advanced training in hormone optimization from A4M, she has gained a new foundation to not only address core imbalances but also to help her patients implement lifestyle, nutrition, and exercise habits to reverse chronic disease and achieve optimal wellness.
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Outside of work, she thrives on movement and adventure, whether it’s CrossFit, hiking, biking, or traveling internationally for medical mission trips. Closer to home, she loves exploring Tennessee with her pup, and is always looking for the next great trail or hidden gem.
Provider-Led Wellness
Erin walks with each patient through their wellness journey, offering informed guidance and a proactive approach by:
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Reviewing advanced functional lab testing
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Identifying root-cause drivers of chronic symptoms and disease
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Creating personalized wellness plans centered on hormone balance, nutrition, movement, and metabolic health
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Supporting cardiometabolic, hormonal, and gut optimization
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Partnering with our dietitian and enrollment team to ensure seamless, coordinated care
With certification from the Institute for Functional Medicine and advanced hormone training through A4M, Erin brings a strong foundation in identifying core imbalances and reversing patterns that lead to chronic disease. Her years in emergency medicine give her a unique perspective—allowing her to recognize early warning signs, prevent crises before they occur, and help patients build resilient long-term health.
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The Difference She Brings to Your Care
Erin blends clinical skill with an energetic, encouraging style that empowers patients to take ownership of their health. Patients appreciate her ability to:
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Explain results and next steps with clarity and confidence
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Address underlying causes instead of simply managing symptoms
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Integrate nutrition, lifestyle habits, mindset, and movement into a realistic, sustainable plan
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Bring steadiness, experience, and genuine partnership to every visit
She brings both expertise and heart to the table—helping patients prevent disease, reclaim wellness, and move forward with strength and purpose.
A Special Note From Erin
“I know how overwhelming the healing journey can feel, and you don’t have to navigate it alone. I’m here to encourage you, help you stay organized and confident, and make sure you always know your next step. Together, we’ll turn your goals into real, steady progress.”
Erin Leffel, PA-C, IFM Certified