Our Providers

James R. Stevens

MD, CAQSM, ABAARM, FAAFP

Medical Director & Provider, Cary location

Dr. Stevens is part of a growing effort to seek, refine and introduce new knowledge and methods to Essential Health clinics in a constant quest to provide an avenue towards better health for those we serve.

Jennie Welner

FNP-BC, ABAAHP, FAARM

Provider, Cary location

Jennie’s clinical focus is hormone balancing, thyroid health, adrenal health, aesthetics, skincare, hair restoration with PRP, IV nutrient therapy, and weight management.

Elizabeth Sierakowski

MD, ABFM, ABOIM, ABAARM

Medical Director & Provider, Raleigh location

Dr. Sierakowski leads the clinical mission of achieving optimal health for our clients, developing the advanced training roadmap for our providers, and helping expand our superior model of care nationally.

Todd J. Harris, DO

Provider, Essential Health – Bozeman

Dr. Harris values connecting with his patients personally, digging deeper into what keeps them healthy, and truly making a difference in their lives.

Accepting new patients!

Kristin “Kris” Bailey

FNP-C, ABAAHP

Provider, Raleigh, Bountiful & Bozeman locations

Kris’ clinical focus is health optimization through preventative care, hormone balancing, regenerative medicine, IV nutrient therapy, thyroid management, stress reduction, gut healing, immune support, and weight management.

Accepting new patients!

Nikki Fowler

FNP-C

Provider, Raleigh location

Nikki emphasizes collaborative goal-setting and building relationships with her patients. Her areas of special interest are regenerative medicine, health optimization, and aesthetics.

Accepting new patients!

Julian R. Gershon Jr.

DO, FAOASM, ABAARM

Provider, Aspen Institute for Anti-Aging & Regenerative Medicine

Dr. Gershon is triple-board-certified in family medicine, sports medicine, and anti-aging and regenerative medicine.

Accepting new patients!

Jill Vanarthos

PA-C, IFMCP

Provider, Raleigh location

Jill Vanarthos, PA-C, IFMCP is a physician assistant at the Essential Health – Raleigh, NC location. Jill’s focus is on optimizing health and healing through inflammation reduction. She is fluent in Spanish.

Accepting new patients!

Jennifer Fabrizi

M.S., PA-C

Provider, Mount Pleasant location

Jennifer’s clinical areas of interest include peptides, hormone balancing, IV nutrient therapy, nootropics, gut health, regenerative medicine, and aesthetics.

Accepting new patients!

kyle obrien headshot

Kyle O’Brien

DO, ABFM

Provider, Raleigh & Cary locations

Dr. O’Brien’s clinical focuses include longevity, performance optimization, hormone balancing, gut health, regenerative medicine, and primary care. He welcomes patients of all ages.

Accepting new patients!

Dr. Tonya Cramer, MD, MPH, DABOM, DACLM, DABPM, DIBLM

Tonya Cramer

MD, MPH, DABOM, DACLM, DABPM, DIBLM

Provider, Cary location

Dr. Cramer’s clinical interest is preventing and reversing disease processes including weight management, hormone regulation, metabolic and cardiovascular disease, and optimized cancer treatment.

Accepting new patients!

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