About
Dr. Greg Dennis earned his undergraduate degree in Biology from Southwestern Oklahoma State University before attending medical school at The University of Medicine and Biosciences in Kansas City, Missouri. Along the way, he worked as an EMT and pursued certification as a paramedic, building a hands-on clinical foundation before completing his medical degree. He holds board certification as a physician and earned certification in Anti-Aging Medicine, a distinction few healthcare professionals in Oklahoma hold. He also holds membership in the Age Management Medicine Group (AMMG).
Dr. Dennis spent more than 15 years in corporate medicine before founding Fit RX in his hometown of Tuttle, Oklahoma. That experience shaped his conviction that patients deserve time, education, and a physician focused on root causes rather than symptoms. He specializes in men's health, testosterone replacement therapy, bioidentical hormone replacement for men and women, and physician-led weight loss using semaglutide with a focus on muscle preservation. He is one of only a handful of providers in Oklahoma offering penile Botox injections for erectile dysfunction. Dr. Dennis hosts the Fit RX Health & Wellness Podcast, exploring longevity, nutrition, and health optimization. Outside the clinic, he enjoys spending time with his family, hunting, playing guitar, and watching movies.
Education & Training
Undergraduate
Southwestern Oklahoma State University, B.S. Biology
Medical School
The University of Medicine and Biosciences, Kansas City, Missouri
Additional Training
EMT and Paramedic certification; Certified in Anti-Aging Medicine
Certifications
Languages
English, Spanish
Conditions Treated
Who is Dr. Dennis right for?
Dr. Dennis is a strong fit for adults seeking a primary care physician who treats root causes rather than just symptoms. Men dealing with low testosterone, erectile dysfunction, or declining energy will find focused, specialized care here. Women navigating perimenopause, menopause, or hormone imbalance benefit from his BHRT expertise. Patients pursuing weight loss through a medically supervised semaglutide program also find a good match with his muscle-preservation approach. His panel suits individuals who want extended visits, same-day access, and a physician who invests time in their health education.
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Frequently Asked Questions
Dr. Dennis specializes in hormone imbalances, low testosterone, erectile dysfunction, menopause, perimenopause, weight gain, and chronic conditions including diabetes, hypertension, and thyroid disorders. He also treats chronic fatigue, anxiety, depression, PCOS, autoimmune disorders, and musculoskeletal pain. His clinical focus spans men's health, women's hormone balance, and functional medicine.
Yes. Dr. Dennis holds board certification as a physician. He also earned certification in Anti-Aging Medicine, a credential held by few healthcare professionals in Oklahoma. He is a member of the Age Management Medicine Group (AMMG).
S. in Biology from Southwestern Oklahoma State University. He attended medical school at The University of Medicine and Biosciences in Kansas City, Missouri. Before medical school, he worked as an EMT and pursued paramedic certification.
Dr. Dennis focuses on root-cause medicine rather than symptom management. He takes a holistic view of health, investing significant time in listening and patient education. He believes in treating the whole person and uses advanced lab testing to guide individualized treatment plans.
Yes. Dr. Dennis is one of Oklahoma's leading providers of testosterone replacement therapy for men. He offers multiple TRT delivery options and takes a comprehensive, monitored approach to male hormone optimization.
Dr. Dennis leads a physician-supervised semaglutide weight loss program with a specific focus on fat loss while preserving muscle. He uses InBody body composition analysis to monitor progress. The program builds a customized plan around each patient's physiology and health goals.
Yes. Dr. Dennis offers penile Botox injections for erectile dysfunction, making Fit RX one of the only clinics in Oklahoma providing this treatment. He also uses the Omniwave platform, the most advanced evolution of GainsWave therapy, for sexual health and musculoskeletal pain. Fit RX is the only Oklahoma clinic offering this Omniwave technology.
Yes. Dr. Dennis treats a full range of women's health issues including perimenopause, menopause, PCOS, estrogen dominance, low libido, and hormone imbalance. He provides bioidentical hormone replacement therapy tailored to each woman's lab results and symptoms.
Yes. Fit RX serves Spanish-speaking patients. The practice notes Spanish language availability to ensure broader access to care.
Yes. Dr. Dennis sees patients via telemedicine in addition to in-person visits. DPC members receive unlimited access to both virtual and in-person appointments, including same-day or next-day scheduling.
Doctor profile last updated April 11, 2026