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.

Austin Zechman - Nutrition & Exercise Counselor

Originally from Pennsylvania, Austin has a Bachelor’s degree in health science from Lock Haven University and a Master’s Degree in Exercise Science from Bloomsburg University. He has completed Strength and Conditioning Internships at Pennsylvania State University and the University at Buffalo working with multiple sports teams including football. His research interests are different nutritional concepts, training methods, and supplements.

When he is not in the gym or coaching clients he enjoys attending sporting events, going on hikes and reading. Austin is committed to helping you achieve your goals and helping you become the best version of yourself!


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.