We Hear You

Meet Our
Virginia Based
Functional Health & Longevity Team

We know what it’s like to get blindsided by symptoms but not have anyone who is willing to help…or even take you seriously.

If you’re like us, you’re tired of being told that everything is "normal," and your symptoms are just part of aging.

Schedule an appointment

Meet The Team

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Amanda Hudgins,
DNP, FNP-C

Amanda is a board-certified Family Nurse Practitioner who has been part of The Johnson Center team since 2018. She began her journey with the practice as a registered nurse and has since advanced into her current role after earning her Doctor of Nursing Practice (DNP). Her transition into functional medicine was inspired by her own personal health journey as a patient at The Johnson Center, where she experienced firsthand the transformative impact of individualized, root-cause care. Amanda has trained closely with Dr. Johnson for several years, integrating functional medicine principles into her clinical practice. Her approach focuses on identifying and addressing the underlying causes of chronic symptoms through personalized strategies involving nutrition, lifestyle, targeted supplementation, and advanced testing. She is passionate about helping patients achieve lasting health and improved quality of life through proactive, whole-person care. Amanda lives in Blacksburg, Virginia with her husband, Eric, and primarily sees patients at the Blacksburg office. Outside of work, she enjoys weightlifting, relaxing at home, and spending quality time with family and friends.

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Kristina McIrvin,
FNP-C

Kristina is a board-certified Family Nurse Practitioner with a strong clinical background in critical care and emergency medicine. Throughout her years in acute care, she treated countless patients suffering from complications of chronic illness and the side effects of long-term medication use. These experiences led her to recognize the profound need for a preventative, root-cause approach to health—one that conventional emergency settings rarely allow time to explore. In 2023, Kristina transitioned to functional medicine by joining the Johnson Center, where she is now able to focus on helping patients prevent, manage, and even reverse chronic conditions through evidence-based, lifestyle-driven care. Her approach emphasizes nutrition, stress reduction, movement, and targeted supplementation to support optimal wellness. With a particular interest in weight management and metabolic health, Kristina has completed additional training in medical weight loss and takes great joy in supporting individuals on their journey toward sustainable, healthy change. She is passionate about patient education and believes that empowering people with knowledge is the foundation of long-term success. Outside of her clinical work, Kristina enjoys spending time with her husband and four children. She loves hiking, gardening, experimenting with healthy recipes, and reading historical fiction.

Nikole Mihill,
DNP, FNP-BC

Nikole is a board-certified Family Nurse Practitioner with over 17 years of diverse medical experience, Nikole brings a deeply personal and professional passion to functional medicine. Her journey in healthcare began in 2008 as a Licensed Practical Nurse, focusing on wound care. In 2017, she became a Registered Nurse and went on to spend over a decade in the Neonatal Intensive Care Unit (NICU), providing care for the most vulnerable patients. Driven to further her impact, she earned her Neonatal Nurse Practitioner (NNP) degree from Old Dominion University in 2022, followed by her Doctor of Nursing Practice (DNP) in 2024, and her Family Nurse Practitioner (FNP) certification in 2025—also from ODU. Nikole’s personal health journey sparked her transition to functional medicine. Living with Hashimoto’s, POTS, and hormone imbalances, she experienced firsthand the frustration of delayed diagnoses and limited treatment options within traditional medicine. After being misdiagnosed for years, she finally received a POTS diagnosis at age 27—twenty years after her symptoms began. That experience fueled her dedication to root-cause healing and individualized care. Today, she specializes in gut health, hormone health, weight loss, and women’s wellness—helping patients uncover the "why" behind their symptoms and empowering them with sustainable, science-based solutions. Outside of work, she’s been married for 16 years and is a proud mom to two energetic boys. She thrives in the outdoors, enjoys hiking, and plays ice hockey in her spare time. Her favorite moments are spent with family, friends, and fresh air.

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Rebecca Johnson,
Practice Director

Rebecca is a long-time resident of the New River Valley and brings over 22 years of healthcare management experience to her role at The Johnson Center. As Practice Director for both the Blacksburg and Virginia Beach offices, she is dedicated to ensuring an exceptional experience for every patient—from the first point of contact to ongoing care coordination. Her leadership and commitment to operational excellence help support the center’s mission of delivering high-quality, personalized functional medicine services. Rebecca takes pride in fostering a welcoming and efficient environment where patients feel supported and empowered in their wellness journey. Outside of work, Rebecca enjoys spending time with family and friends, especially her two children, Cameron and Marcus. She loves being outdoors—particularly at the lake, where she enjoys boating and soaking up the sun.

Kelsey Acklen,
Patient Coordinator

Kelsey brings a strong foundation in patient coordination, healthcare administration, and customer service to her role at The Johnson Center. With a compassionate and detail-oriented approach, she plays a key role in ensuring a smooth and supportive experience for every patient. From scheduling and communication to clinical workflow management, Kelsey is dedicated to providing seamless operational support for both patients and providers. Her commitment to clear communication and personalized service helps patients feel informed, valued, and empowered throughout their care journey. Kelsey is often the first point of contact for new patients, and her warm, knowledgeable presence helps set the tone for the high standard of care that defines functional and integrative medicine. With a family-centered mindset, she understands the importance of empathy and trust in building lasting patient relationships. Her goal is to help foster an environment where individuals and families feel confident, cared for, and connected from their first visit onward.

Meet Our Director

Barbara Johnson, MD,
Medical Director

Dr. Johnson is the founder and Medical Director of The Johnson Center for Health, with locations in Blacksburg and Virginia Beach, Virginia. She personally researches and oversees all treatments, ensuring top-quality care. The Johnson Center uses a holistic approach to address medical concerns, restore balance, and promote lasting well-being. Dr. Johnson focuses on prevention through Lifestyle Medicine, combining lab tests with prescriptions, natural remedies, supplements, diets, and stress management. Specializing in Women's Health, she also started the Age Elegantly movement to help women age gracefully and healthily.

At The Johnson Center, we get it.

If you feel like something is off, we believe you! Our team of multidisciplinary medical providers is here to listen to you and tailor our integrative medical treatments to promote longevity with treatments that align with your unique physiology, lifestyle, and aspirations.

We’re committed to guiding the Virginia area on a transformative journey toward healthy aging. That means we don’t just treat symptoms; we delve deep to understand the root cause, crafting a personalized treatment plan that will empower your body to repair and prevent further damage so you can enjoy a longer lifespan and healthspan.

Here’s how we do it:

Get to know you

In our initial appointment, we’re all ears! We’ll listen to your concerns, explore your emotional & physical health history, & order testing to uncover the root cause.

Find balance

Based on your test results, our team of experts will craft a custom treatment plan and give you the support and education you need to regain your health.

Keep moving

Life is a journey and so is your health. We’re here for you long-term to help you maintain balance and deal with whatever life throws at you.

From the moment you step into our clinic, you become part of our family. We’re here to stand by you, to help you repair, rebalance, and restore so you can step into a healthier, more vibrant version of yourself.

We can’t wait to meet you!