We want you to receive the healthcare you deserve.
Our Mission
Promoting positive healthcare outcomes through dietary refinement, physical fitness, and preventative medical treatment.
Our Approach
Modern medicine has achieved incredible milestones over the past century, yet its focus on treating illnesses often overshadows the importance of preventing them.
By focusing on core pillars of wellness—exercise, nutrition, sleep, and mental health—we aim to build a strong foundation for long-term well-being.
Lifestyle changes can’t prevent every illness. We implement proactive personalized monitoring and early intervention to combat a wide range of health issues, including cardiovascular, metabolic, and neurodegenerative diseases.
We understand there isn’t one-size-fits-all solution for health. That’s why we take a personalized approach, evaluating each person’s unique history, family background, and goals to design sustainable, effective health strategies.
Sustainable Health Requires Consistency
At Grand Health, we believe lasting health is built through consistency, accountability, and evidence-based action—not quick fixes.
The greatest improvements in health, performance, and longevity come from following a thoughtful plan over time and making adjustments based on measurable results. That is why continuity of care and ongoing monitoring are central to our approach.
Through regular follow-up visits and comprehensive reassessments, we track your progress, evaluate what is working, identify areas for improvement, and refine your plan as your health and goals evolve.
Health is not a straight line. Life changes, priorities shift, and new challenges arise. Our role is to establish your baseline, provide a clear roadmap, measure progress objectively, and guide you every step of the way.
Whether your goal is improving performance, reducing disease risk, optimizing body composition, or extending your healthspan, we partner with you to create sustainable change and meaningful long-term results.
Our Team
MEDICAL DIRECTOR, PROVIDER
Tobin Dennis, MD
Tobin Dennis brings a wealth of expertise and compassion to his longevity medicine practice, drawing from a diverse medical career and a lifelong commitment to health and wellness.
Born and raised in the town of Jackson, Wyoming, Dr. Dennis developed a deep appreciation for the natural world and an active lifestyle, which continues to inspire his approach to medicine. He pursued his medical education at the prestigious University of Washington, where he cultivated a passion for understanding the intricacies of human health.
After completing medical school, Dr. Dennis specialized in Emergency Medicine, thriving in the fast-paced and high-stakes environment of hospital care. His years in emergency medicine provided him with a profound understanding of acute medical conditions and the importance of proactive, preventative care. Recognizing the growing potential of personalized health strategies to enhance long-term well-being, Dr. Dennis transitioned to focus on longevity medicine—a field dedicated to optimizing health and vitality throughout life.
Dr. Dennis believes in an evidence-based approach, combining advanced diagnostics, tailored interventions, and lifestyle strategies to help his patients thrive. As a father of two, he understands the importance of balancing health, family, and personal growth, and he brings this perspective to his patient care.
Outside the office, Dr. Dennis stays active through his favorite hobbies: biking and skiing. Whether navigating trails on two wheels or carving fresh powder on the slopes, he embraces the same zest for life that he encourages in his patients.
Dr. Dennis is committed to empowering individuals to take control of their health journeys, ensuring they live longer, healthier, and more fulfilling lives.
PROVIDER
Katy Kearns, FNP
Katy Kearns is a Family Nurse Practitioner who has called Jackson home for the last 4 years. She grew up in a military family, which moved around frequently, and is from a little bit of everywhere. After completing a Bachelor's degree at Texas A&M University in Biomedical Sciences, she decided to pursue a career in nursing; she returned to school, earning her BSN from Texas A&M University-Corpus Christi. She spent the first few years of her professional career as a registered nurse in critical care in Houston, Texas.
After getting married to her husband, Jeff, they made the move to Jackson to be closer to some of Katy's Family, and fell in love with the mountain lifestyle, the outdoors and this amazing community. While employed locally as an ER nurse, she worked on her Master's of Science in Nursing from Purdue Global University. After graduating, she has transitioned to Urgent Care as a Family Nurse Practitioner. Her favorite things to do include traveling, baking, reading, and doing anything outside: hiking, mountain biking, skiing, scuba diving, and paddle boarding.
As a part of Grand Health, Katy's priority at the clinic is to take time to appreciate her patients as individuals and have open conversations that allow them to make informed decisions about their health goals. Her personal philosophy as a provider is helping patients find a balance between healthy lifestyle choices while still being able to do the things that make life worth living. A personal and professional passion is providing equitable care to women in all stages of life.
PHYSICAL THERAPY
Gillian Berrian, PT, DPT, OCS
Gillian has called Jackson Hole home for nearly 20 years and has practiced as a Doctor of Physical Therapy here for the past decade. She understands firsthand what it takes to stay strong, active, and capable in a place where movement is part of daily life.
Her approach blends evidence-based care with a broader focus on longevity—helping clients recover from injury, build strength, and optimize their health in a way that supports the activities and passions that matter most to them. She works with individuals of all ages and activity levels, helping them build a strong, sustainable foundation for long-term health.
Outside the clinic, you’ll find Gillian hiking, mountain biking, and skiing. She also enjoys adventuring outdoors with her husband and dogs in this beautiful place we call home.
NUTRITIONAL HEALTH
Jack Henley
Jack grew up in Western Massachusetts and spent a decade living in the Tetons, where he worked as a software engineer, backcountry ski guide, and avalanche educator. A belief in food as medicine landed him in Flagstaff, AZ, where he earned a master's in nutrition at Northern Arizona University. Jack maintains that food is inherently simple but that eating healthy has become increasingly difficult. He is looking forward to helping you navigate your food choices and get back to the basics of nutrition.
When not in the clinic, Jack remains active with Slow Food in the Tetons, working at the farm stand during the growing season. You may also see him out climbing, running, skiing, or frequenting the dance floor at the Wort.
PHYSICAL FITNESS AND MOBILITY
Scott Smith
Scott is a passionate health coach and personal trainer dedicated to helping individuals achieve vibrant health and lasting vitality. He works closely with clients to build personalized fitness programs that not only enhance strength and endurance but also sustainable habits, stress management, and recovery practices to improve mental clarity and resilience. Committed to fostering long-term transformation, Scott believes that true health is a balance of physical vitality and mental strength.
Whether you're looking to increase energy, enhance physical performance, or age gracefully, Scott is your trusted partner in the journey toward a longer, healthier life.
RECEPTION AND EQUIPMENT MANAGER
Holly Dennis
Holly brings a ‘let’s get this done, but with some fun’ attitude to Grand Health. Holly grew up in Florida where she played collegiate tennis and spent every free moment exploring the St. John’s river. Holly has been a veterinary technician for over 20 years first specializing in emergency and critical care, and then canine rehabilitation with a focus on neurological patients. She continues to enjoy working in veterinary medicine part-time in Wilson.
Holly discovered her passion of helping others reach their fitness goals after having her children. Holly has completed a variety of certifications in group fitness, personal training, and bone densitometry. She is excited to be part of the healthcare team to help cheer on and encourage patients to continue their journey into health optimization.
Your Questions, Answered
What does Grand Health provide?
At Grand Health our dedicated team of experts work with you to create a personalized plan to enhance your health span — the time you live without disease. We take an individualized approach: combining the right balance of medications, nutrition, and physical activity to optimize your well-being.
What is your philosophy on health?
We believe in prioritizing lifestyle interventions first, using medications only when necessary. Every individual is unique, and our personalized approach considers your lifestyle, dietary habits, and available time. Our goal is to create sustainable strategies that fit into your life, helping you stay healthier for longer.
Where does your philosophy stem from?
Our philosophy is rooted in evidence-based medicine and the principle of informed decision making. We rely on the latest, scientifically supported protocols to help enhance health span and longevity.
Our model emphasizes in-depth, personalized interactions with clients. Through meaningful conversations, we explain the research behind our recommendations and the rationale for each decision. This empowers you to make informed choices about your health, supported by a clear understanding of your options.
What does a membership look like?
At Grand Health, our primary goal is to help you optimize your health and well-being. We understand that there are no shortcuts to living a healthy life, which is why we prefer a subscription-based model that fosters long-term, sustainable results.
Upon joining, you’ll undergo a comprehensive initial assessment, where you'll meet with your provider, dietitian, physical therapist, and personal trainer. This helps us understand your unique needs, preferences, and goals. Through a series of detailed assessments, we’ll establish clear, achievable goals and create a personalized roadmap to help you reach them.
As a member, you’ll receive ongoing support and regular check-ins throughout the year. We’ll continue to adjust and refine your plan based on your progress, needs, and availability, ensuring that you stay on track and continue to optimize your health.
Do you provide day-to-day training?
We focus on setting clear goals and providing you with a customized plan designed to help you achieve them. We conduct assessments, guide you through the initial steps, and ensure you have the tools to succeed. However, the ongoing work will be done outside of our office.
To support you further, we have strong connections with a network of specialists and providers who can offer additional guidance and resources to help you stay on track and reach your health goals.
Who is a good candidate for Grand Health?
We believe that anyone can who wants to take control of their health is a good candidate for Grand Health. We believe the earlier you start thinking about your health the better, but also there is no one who cannot significantly improve their future with the right directions.
What results can I expect?
Goals and thus results will be tailored to each persons’ goals and lifestyle however in general you can expect to improve your body composition, energy levels and overall well being. We will track multiple metrics to give objective analysis of your improvements to help monitor and guide continued improvement.
Do you provide virtual consults?
For our initial evaluation and work-up, you need to be available in person, as you will be taken through an in depth evaluation which will require hands-on work along with multiple different assessments. We will be able to provide continuing contact through virtual appointments.
Don’t see your question?
Contact us today to book a free phone consultation to ask us anything and to get the information you need to become a Grand Health member.
We want to hear from you.
Your real health is our priority. Book your consultation appointment today.
Fill out the form with your information and a short description of your goals. Someone from our team will be in touch shortly.