Cenegenics Denver

Cenegenics Denver

6400 S Fiddlers Green Circle, Suite 200
Greenwood Village, CO 80111

Aging is inevitable, but how you age is not.

Wouldn't it be great if your doctors knew exactly how to help get your energy back, effortlessly lose extra pounds, sleep with ease, create lasting intimacy in your relationship again, and have the flawless mental clarity you did 20 years ago? With Cenegenics Denver, you can look, feel, and perform better than you have in years.

Your Cenegenics Team


Julie McCallen, MD

President & Center Physician - Cenegenics Denver

Dr. Julie McCallen is the President of Cenegenics Denver. She is board-certified in Family Medicine, and a member of the Endocrine Society, the International Hormone Society, the American Academy of Family Physicians, and the Age Management Medicine Group. After earning an undergraduate degree in Biochemistry from Cornell University, Dr. McCallen received her MD from the University of Pittsburgh School Of Medicine in 1990. She completed her residency in Family Medicine at the University of Wyoming-Casper in 1993.

Tim Watt, MD

Center Physician - Cenegenics Denver

Tim J. Watt, MD, FAANS, and FAAAAM is a Kansas native who attended Wichita State University getting degrees in biology, chemistry, and psychology. He then entered the MD / Ph.D. program at the University of Kansas where he studied seizures while in graduate school. Dr. Watt did his surgical internship and residency in neurological surgery at the State University of New York Upstate. While there, he did award-winning research on brain tumors. Major Watt is a veteran of the US Army first serving with the 357 Combat Support Hospital where he was Chief of Surgery and then at Tripler Army Medical Center where he was Assistant Chief Neurosurgery and head of Pediatric Neurosurgery. After the Army, Dr. Watt entered private practice while also holding academic appointments at the University of Nebraska Medical School, Union College, and the University of South Dakota Medical School. Dr. Watt became interested in wellness and preventive medicine in 2003 becoming the first doctor to ever be Board Certified in both Neurosurgery and Anti-Aging Medicine. He has completed Fellowships in Anti-Aging Functional and Rejuvenative Medicine as well as Metabolic Medicine and Functional Endocrinology.

After 35 years of neurosurgical practice, Dr. Watt left surgery to work full-time at Cenegenics as his passion for helping patients was better served by keeping people healthy rather than trying to fix them after they became so ill they needed an operation. Dr. Watt is a Fellow of the American Association of Neurological Surgeons and the American Association of Anti-Aging Medicine.

Eipe Kuruvila, MD

Center Physician - Cenegenics Denver

Dr. Kuruvila attended medical school at JIPMER, Pondicherry, one of the top medical schools in India. His graduate training was in the UK, including anesthesiology at The University of Bristol Hospitals followed by Higher Professional training at The Middlesex Hospital. He later attended Medical School in London for another four years. He and his family moved from London to Denver after they fell in love with skiing in the Alps. Dr. Kuruvila completed his fellowship in Anesthesiology and Pain Management at the University of Colorado Health Sciences Center in Denver.

Nutrition & Exercise

Matthew Mitchell

Performance Health Coach - Cenegenics Denver

Graduating with his Masters in Kinesiology, Matt has experience working with collegiate and professional athletes in nutrition, strength and conditioning, and mental performance. He works closely with clients to create proper motivational and behavioral decision-making skills for optimal results.


• MS Kinesiology, emphasis in Sport Psychology – University of North Texas
• BS Kinesiology, minor in Nutrition & BS Psychology – University of Alabama
• CFL1

Joshua Garcia

Performance Health Coach - Cenegenics Denver

Before joining the Cenegenics team, Joshua was a Strength and Conditioning Coach, working with high school, collegiate, and professional athletes. He’s also been part of tactical strength and conditioning teams. Joshua’s hobbies include grappling, kickboxing, strength training, motivational speaking, and cooking.


• BS Kinesiology – New Mexico State University
• Certified Strength & Conditioning Specialist
• EXOS Performance Specialist Certification
• EXOS Fitness Specialist Certification
• Precision Nutrition – Level 1

Patient Experience

Michelle Dayhoff

Director of Center Operations - Cenegenics Denver

Michelle is a communication expert with experience in business development, team leadership, digital marketing, and corporate travel and events. Prior to joining Cenegenics Denver, Michelle was a Media Strategist for Salem Media Group where she produced marketing campaigns to help communicate with potential members. From 2017-2019, Michelle was the Senior VP and General Manager for Event Travel Management. Michelle has also worked as a Director of Business Development for American Express Global and was Director of Strategic Marketing for Travel Leaders.

Michelle received her MBA from Regis University in Denver, where she graduated Summa Cum Laude.

Melissa Prince

Patient Experience Coordinator - Cenegenics Denver

Melissa is a Patient Experience Specialist, based out of Northeast Pennsylvania. She has been with Cenegenics since 2014 and has been working with Cenegenics Denver since October 2020. Her passion for health and wellness is demonstrated not only through her work but also as a yoga teacher and competitive equestrian. She strives to live a healthy lifestyle while helping others do the same through Cenegenics.

Natalie Butterfield

Patient Experience Coordinator - Cenegenics Denver

Natalie is a Patient Experience Coordinator originally from the Sacramento area. She moved to Colorado in 2016 and studied Integrative Physiology at the University of Colorado, Boulder earning her Bachelor of the Arts degree. She worked as a Sports Medicine Intern at CU Boulder with the track and cross-country team. Natalie is a Certified Medical Assistant and leads an active and healthy lifestyle that includes hiking, snowboarding, and cooking!

In addition to the diagnostics performed at all Cenegenics Centers, in Denver we offer these enhanced services:

  • Maximized Energy

    Genomic Testing

  • Maximized Energy

    Hormone Replacement Therapy

  • Maximized Energy

    WAVi Testing

The Cenegenics program often delivers these healthy benefits:

  • Maximized Energy


    Breakthrough a lack of motivation and take control of your day fully energized.

  • Maximized Energy

    Optimize Body

    Reverse a slow and steady weight gain and return to your optimal body composition.

  • Maximized Energy

    Sexual Health

    Ignite your desire for intimacy, and turn around diminishing sexual performance.

  • Maximized Energy


    Renew clarity, “feel like yourself again” and overcome memory lapses or forgetfulness.

  • Maximized Energy


    Enjoy sleeping through the night again wake refreshed.

  • Maximized Energy


    Achieve your peak mental and physical state that will help you successfully manage and control stress in your life

See what our clients are saying about us.

My assessment of the program’s success is that it comprehensively integrates the three essential elements of well-being: 1) diet (low glycemic), 2) supplementation/hormone balancing (data-based) and 3) exercise (tailored). I lost 28 pounds, added 15 pounds of lean mass, and, most importantly, have a competitive level of energy. The personable, patient advocate’s partnership with Dr. McCallen and her state of practice knowledge has fostered a trust-based rapport. Her consultations around the comprehensive quarterly blood tests, engagement in working to resolve any identified medical issues, and overall well-being coaching have become an indispensable part of my healthcare regimen.

RW Cenegenics, Denver

Being with the Cenegenics program was the BEST thing that we ever did but also the worst. When we started with you, it was because my husband was having guy problems and I was on blood pressure meds. Well, after your blood tests, we found out there was so much more. Because of you, diet recommendations, medications & vitamins, and, of course, the encouragement to exercise, our lives changed so dramatically. My husband and I both lost weight and felt better than we had since we were in our 20s. Our sex life was something that I never knew was possible. My periods were nothing to speak of, all of the peri-menopausal symptoms were gone. CENEGENICS WAS THE BEST THING EVER. We will continue to tell everyone we know about you. We will never forget what we learned.

M and D Cenegenics, Denver

Dr. McCallen has helped me change my life in the past year! Initially, when I met her I was skeptical as I had been to several specialists who told me all of my hormones and the entire endocrine system were working “normal” by medical standards. Dr. McCallen actually listened to my concerns and issues, and also knew immediately how to help me feel more whole and become more fit and happy. She has provided great insight into what “normal” really is for my personal self, and I am living an amazing life now because of her and Cenegenics®! I never knew what being at the correct weight for my body was like as I can’t recall ever feeling this good, even growing up. I also never knew how just a few tweaks with my hormones would make me feel so much more alive each day. Dr. McCallen is very skilled and talented and most of all, she really listens to her patients to find out what their main issues are, and then sets them on a path that leads them to health and happiness! I can’t thank her enough!

DL Cenegenics, Denver