Cenegenics Cleveland

Dr. Kelly Roan is an Emergency Medicine–trained physician with a lifelong dedication to performance health, preventive care, and longevity medicine. His clinical background in high-acuity care, combined with hands-on leadership in wellness operations, gives him a uniquely practical and results-driven approach to optimizing long-term health.

Dr. Roan completed his emergency medicine training at University Hospitals / Case Medical Center, where he developed a strong foundation in complex clinical decision-making and patient-centered care. Prior to joining Cenegenics, he held operational leadership roles with BNR Medical Consulting and founded the Vitality Lounge, a health and wellness practice serving Northeast Ohio—further reinforcing his belief that optimal health is built proactively, not reactively.

At Cenegenics, Dr. Roan partners closely with members to design personalized longevity programs grounded in advanced diagnostics, lifestyle optimization, and collaborative care. He is known for his team-based approach, working alongside members to create sustainable strategies that improve performance, resilience, and daily vitality. His clinical outcomes reflect this philosophy—measured, meaningful, and lasting.

An avid cross trainer, Dr. Roan leads by example, embodying the principles he brings into his practice. His commitment to disciplined training, recovery, and balance mirrors Cenegenics’ mission: helping high-performing individuals live stronger, healthier lives at every stage.

Dr. John Kocka is a Partner Physician at Cenegenics and a highly respected leader in longevity, performance, and preventive medicine. Trained at the renowned Cleveland Clinic, he completed his residency in Family Medicine with advanced specialization in Sports Medicine—laying the foundation for a career centered on optimizing human performance and long-term health.

Dr. Kocka has been a Cenegenics physician since 2012 and brings a rare combination of clinical excellence, leadership experience, and real-world performance medicine to his members. Prior to joining Cenegenics, he founded Premier Health Clinic, a comprehensive preventive and sports medicine practice, and served as Medical Director for both Twinsburg Urgent Care and Twinsburg Health & Wellness Center.

His leadership extends beyond traditional healthcare settings. Dr. Kocka served as Medical Director for NASA’s Glenn Research Center, overseeing the medical clinic, occupational health program, and fitness center, an experience that reflects his ability to manage complex systems where performance, safety, and precision matter most.

A decade-long officer in the U.S. Air Force Reserve, Dr. Kocka rose to the rank of Lieutenant Colonel and served as Chief of Medicine for the 910th Medical Squadron. His service instilled a disciplined, mission-driven approach that continues to shape his medical philosophy today.

In addition to board certification in Family Medicine, Dr. Kocka holds board certifications in Age Management and Regenerative Medicine and is physician-certified by the Cenegenics Medical Institute. His expertise is further distinguished by extensive experience in combat sports medicine, having served as a ringside physician for professional athletic commissions and major organizations, including mixed martial arts promotions at the highest level.

An accomplished athlete, Dr. Kocka has earned multiple titles in natural bodybuilding and martial arts and previously served as an instructor in mixed martial arts training. Though retired from competition, he remains deeply committed to weight training, functional fitness, nutrition, and recovery—living the principles he teaches and embodying the Cenegenics promise of lifelong performance.