Meet Our Professional Team

Each member of the Cenegenics® physician team 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 A. Fein, MD, FACG


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.

Dr. Fein has achieved great success as a patient on the Cenegenics® Elite Program over the last 2 years. It is his success on the program that has motivated him to practice Age Management Medicine with Cenegenics.

Dr. Fein

Dr. John Cottingham, MD

Cenegenics Physician

Dr. John Cottingham is a graduate of Clear Creek High School. He earned his medical degree from the University of Texas Medical Branch (UTMB), Galveston and completed his internship and residency in family practice at Baylor College of Medicine.

He is board certified by the Board of Family Medicine. He also is a member of the American Academy of Anti-Aging and the American Academy of Family Medicine. Dr. Cottingham completed Cenegenics Training & Certification in Age Management Medicine in December 2013, now seeing patients at our Cenegenics Houston location in The Woodlands, TX.

His passion for preventive care and wellness leads him to approach medicine in a more natural way. Dr. Cottingham says, “After all, humans are a species of athletes. When we eat and exercise as we are designed to do, we live happier and healthier lives.”

Dr. John Cottingham | Cenegenics Physician

Iryna Voyutska

Nutrition & Exercise Counselor

Iryna received her Physician Assistant degree with honor in 1985 and received her M.D. degree in 1998 from Odessa State Medical University, one of the leading medical universities in Ukraine. The school is a member of the International Association of Medical Universities, and the high standards of training at the institution are well recognized throughout Europe and America. With such a diverse student population, education is given in Russian, Ukrainian, and English languages.

During her studies, Iryna trained in Track & Field and was the fastest runner at the college from 1982 to 1985.
She also won the bronze medal for the county collegiate 400-meter race in 1985.

She has worked as a school physician for athletics, giving lectures about the importance of body composition, microelements, vitamins, and antioxidants as natural enhancers in sports competitions.

Since moving to Houston in 2006, she has continued her education in pathology, biochemistry, immunology, behavioral science, and clinical applications for age management medicine. She began her work with Cenegenics® in 2008, focusing on patient assessments and customized nutrition and exercise plans.


Our team is ready to provide you with an incredible experience!