Meet Your New Doctor

Our hand-picked team of physicians, nutrition and exercise coaches, and knowledgeable staff are ready to provide you with an incredible experience.

When you become a Cenegenics® Dallas patient, you are provided a dedicated team consisting of your physician, nutrition/exercise counselor and service coordinator. Your team is focused on helping you achieve your health, vitality and wellness goals every day.

Each Cenegenics® physician has completed the Clinical Strategies for Healthy Aging in Age Management Medicine program, sponsored by the Age Management Medicine Education Foundation (AMMEF), the educational division of Cenegenics® Education and Research Foundation (CERF) - providing our physicians with a specialized skillset to practice this medical specialty.

Steven Fein, M.D., FACG - Partner Physician

Board certified in Gastroenterology, Internal Medicine, Advanced Bio-Identical Hormone Therapy and Age Management Medicine. Dr. Steven A Fein attended medical school at the University of Florida. He did his Internal Medicine training at Baylor College of Medicine and his Gastroenterology training at the University of Texas Medical School. Dr. Fein has been practicing Internal Medicine/Gastroenterology in the Houston area since 1981.

Since 2013, Dr. Fein has achieved great success as a patient on the Cenegenics® Elite program. It is his success on the program that has motivated him to practice Age Management Medicine with Cenegenics®.

Alisha Sviderski - Patient Service Coordinator

Alisha has been a member of Cenegenics® since 2013. She started in our corporate office and relocated to Dallas, TX in 2014. She is our Patient Service Coordinator at Cenegenics® Dallas and is dedicated to helping patients improve their lives. Alisha assists with patient inquiries, maintains day-to-day operations at the office, schedules patient visits and consults, and processes prescription fulfillment and lab requisitions. In her spare time she loves spending time with her husband and taking her dogs on adventures.

Chris Patterson - Nutrition & Exercise Counselor

Cenegenics® Atlanta Nutrition & Exercise Counselor – Christopher Patterson, BS. AMFPT-CPT specializes in Kinesiology, Exercise Science, Physiology, Personal Training, Exercise Prescription Fitness Training and Athletic Training. Christopher completed his Bachelor of Science in Kinesiology at Georgia Southern University and is an American Muscle & Fitness certified personal trainer.

Chris developed a passion for personal training and fitness after working in the physical therapy industry and not being able to spend as much one-on-one time as he liked to spend with patients to learn about their needs, lifestyle and wellness goals.

Since working with Cenegenics®, Chris has been able to spend as much time needed with each individual patient to learn about their exact needs and lifestyle. Chris has been with Cenegenics® Atlanta since 2013 and works with our patients on a one-on-one basis to create a personalized Cenegenics® Nutrition and Exercise treatment plan to help you reach your maximum potential!


Resources for You


Read our White Paper, Defy Your Age with Cenegenics™, and learn about the science of age defiance and the Cenegenics process.

Official YouTube

Free advice from Cenegenics physicians, video testimonials from patients, and other news.


Read regular updates from Cenegenics on our blog.