About Advanced Practice Wellness Clinic
At Advanced Practice Wellness Clinic, we provide safe, affordable, quality healthcare in a warm and friendly environment. Locally owned and operated in Joplin, MO.
Meet the Team
Quentin Caswell, NP
Functional & Integrative Medicine Practitioner
Specializing in Hormone Optimization · Gut & Brain Health · Endocrine Balance · Sleep · Metabolic Fitness · Lifestyle Medicine
With over two decades of experience in healthcare, Quentin Caswell, NP, brings a deep and evolving passion for functional medicine and root-cause healing. His journey began in the late 1990s in sleep medicine, where he developed a strong clinical foundation and went on to serve as Director of Sleep Medicine at a nationally accredited sleep disorders center in Northwest Arkansas for eight years.
This early focus on sleep sparked a powerful realization: true wellness depends on balance across every system in the body. Understanding the role of sleep in metabolic, cognitive, and hormonal regulation led Quentin to explore the interconnected landscape of gut health, endocrine function, brain health, and overall homeostasis. Today, he partners with patients to restore balance across the core pillars of health:
Sleep · Nutrition · Exercise · Stress Management · Hormone Balance · Detoxification · Hydration
Quentin is especially passionate about gut health, recognizing its central role in inflammation, hormone signaling, immune resilience, and even mood and cognition. By addressing digestive imbalances, endocrine dysfunction, and neurocognitive decline at their roots, he helps patients unlock greater vitality and long-term wellness.
Committed to addressing the shortcomings of conventional healthcare and the impact of our broken food systems, Quentin draws on evidence-based protocols from leading organizations such as the Institute for Functional Medicine, Worldlink Medical, and the American Academy of Anti-Aging Medicine (A4M). His focus on metabolic and hormonal optimization is grounded in the belief that conditions like obesity, diabetes, cancer, autoimmune disease, and cognitive decline are largely preventable—and often reversible—through targeted interventions that prioritize root-cause resolution over symptom suppression.
Whether helping patients rebalance hormones, reclaim energy and focus, restore gut and brain health, or reverse early signs of metabolic disease, Quentin’s mission is clear:
To empower individuals to take control of their health through personalized, integrative strategies that restore vitality, clarity, and longevity.
Carl H. Smith, MSN, APRN, FNP-C,
PMHNP-BC
Family & Psychiatric Mental Health Nurse Practitioner
Carl H. Smith is a dual-certified Advanced Practice Registered Nurse with extensive experience in both family medicine and psychiatric mental health. He earned his Master of Science in Nursing from the University of Missouri–Columbia (Mizzou) in 2012, followed by a post-master’s certification in Psychiatric Mental Health from Frontier University in 2019. Carl also holds a Master’s degree in Human Resources Development from Pittsburg State University, reflecting his diverse professional foundation.
Before entering healthcare, Carl excelled in roles across Information Technology, Planning, and Human Resources Management at St. John’s Regional Medical Center. His nursing career began in general surgery, emergency medicine, and intensive care, but his greatest passion emerged while providing inpatient psychiatric care at both St. John’s Hospital and Freeman Health System in Joplin, Missouri.
In 2011, Carl and his partner, Quentin Caswell, opened Any Lab Test Now and InShapeMD in Joplin, offering direct-to-consumer lab testing, weight management, and testosterone replacement therapy for men. Over the years, Carl has played a pivotal role in expanding and advancing clinical services far beyond the original scope. Today, Advanced Practice Wellness Clinic stands as the premier integrative and functional medicine practice in the Four-States region.
Carl’s dedication to mental health guided the development of the clinic’s Functional Brain Health Optimization program, which features innovative ExoTMS technology. His vision continues to shape the clinic’s growth, ensuring a comprehensive and patient-centered approach to wellness.
Outside of his professional work, Carl is a devoted father and grandfather who enjoys traveling, reading, and spending quality time with his family and friends.
Our most popular services are only a click away.
Medical Weight Management
Lose Weight the “HealthyWeigh” with our 3 Step Medically-based Weight Loss Management Program.
Hormone Therapy
The interest in a more natural approach to hormone therapy has focused attention on bio-identical hormones.
Aesthetic Services
Wide range of aesthetic services provided by a Licensed Family Nurse Practitioner or Medical Aestheticians.
Cool Sculpting
CoolSculpting’s unique technology uses controlled cooling to freeze and eliminate unwanted fat cells without surgery or downtime.
Male Issues
Whether you have a common illness, or need a routine checkup, our clinic now open and will be your most convenient and affordable healthcare option.
The Glow Club
We make it easy to take control of your health and beauty regimen. Glow Club membership offers exclusive access and keeps your goals on track and on budget.