You only have one life. Make the most of it.


Dr. Chris Renna

Dr. Renna graduated from University of Texas, earned his medical degree cum laude from the University of North Texas Health Science Center and completed a residency in family medicine. In his initial years of practice, he learned that medical school prepared doctors to diagnose disease but did not prepare them to create health.

Dr. Renna decided to truly help his clients improve health, he needed to create an entirely new system and approach.  This was the beginning of LifeSpan medicine.  LifeSpan provides comprehensive and focused medical evaluations specializing in preventing disease, resolving symptoms and improving health.  These programs are delivered through personalized concierge support, access to your medical team 24/7 and exceptional follow up. 

Since founding LifeSpan medicine in 1992, Dr. Renna has maintained a small practice focused on optimal health with two rules. 

Everything is about you.
Everything is about your health.

Over the years his passion and dedication to clients as well as his unique approach has earned him an exceptional reputation as the nation’s premiere preventive medicine provider. He is a published author, popular public speaker and lecturer to audiences across the United States and abroad.

“Dr. Renna changed my life. All of the injuries from my athletic youth were starting to add up and the constant pain from arthritis seemed to be something I was going to have to live with. Since having the injections I have been able to ski..and to live my active life without having to manage pain.”


Dr. Moshe Ben-Roohi

Moshe Ben-Roohi, M.D. specializes in advanced non-surgical orthopedics and regenerative treatments for sports injuries, degenerative joint disease, and conditions of the spine. He often works with clients who have tried everything else and failed. 

He is board certified in Physical Medicine and Rehabilitation (PM&R). He obtained his medical degree at Tel-Aviv University’s Sackler School of Medicine and residency at NYU Medical Center and Hospital for Joint Diseases where he served as Chief Resident. After residency he completed a fellowship in Interventional Spine and Sports Medicine. 

Dr. Ben-Roohi maintains his role in academic medicine through his continued pursuit of ongoing research. He has published numerous scientific papers in PM&R and other peer reviewed journals. He is a frequent speaker on the subjects of Sports Medicine, Pain Management and Molecular Orthopedics. Dr. Ben-Roohi is a member of the American Medical Society for Sports Medicine (AMSSM), North American Spine Society (NASS), International Spine Intervention Society (ISIS), International Cellular Medicine Society (ICMS), American Academy of Orthopedic Medicine (AAOM), Institute for Functional Medicine (IFM) and the American Academy of Physical Medicine and Rehabilitation (AAPMR).

Dr. Jared Greenberg

Dr. Jared Greenberg is a leading specialist in regenerative and non-surgical orthopedics and recognized by his peers as a top doctor in spine medicine. Dr. Greenberg is board-certified in PM&R, and a fellow of the American Academy of Physical Medicine and Rehabilitation. He has performed over 12,000 spine, joint and bursa injection procedures in his career and has an expertise utilizing top technologies including fluoroscopic X-ray or ultrasound guidance for added accuracy and precision.

Dr. Greenberg attended the University of Pennsylvania in Philadelphia, PA for medical school. After completing his M.D. degree, he began an Orthopedic Surgery residency at the University of Wisconsin in Madison, WI. During his surgical training, Dr. Greenberg realized that he was more interested in non-operative treatments of musculoskeletal conditions, rather than operative. In 2006, Dr. Greenberg then returned to Philadelphia for a second residency, in Physical Medicine and Rehabilitation (PM&R). He completed this program at the Hospital of the University of Pennsylvania in 2009, and served as a Chief Resident for two consecutive years.

Dr. Greenberg then received subspecialty training as an Interventional Spine Fellow / Clinical Lecturer in the PM&R Spine Program at the University of Michigan Health System in Ann Arbor, MI. Dr. Greenberg was also selected to serve as a National Board Examiner through the American Board of Physical Medicine and Rehabilitation.

Dr. Jay Lombard

Dr. Jay Lombard is a renowned board-certified Neurologist that has dedicated his practice and career to the development and implementation of individualized brain health programs.  Dr. Lombard uses advanced genetic profiles, imaging and cognitive testing to help clients improve mood, mind and memory throughout the course of their lives. He is an expert at assessing and reducing brain risk while improving and preserving brain function.  

His expertise also extends into the treatment of complex brain conditions and diseases such as Alzheimer's, Parkinson's, Stroke, Dementia and depression. Dr. Lombard’s discoveries has been regarded by key opinion leaders as some of the most significant breakthroughs in neurology and psychiatry.

Dr. Lombard received his medical degree from Nova University and his postdoctoral medical training at Long Island Jewish Medical Center, where he was the chief resident of neurology and completed two additional years of training in psychiatry. He served as chief of Neurology at Westchester Square Medical Center,  Brain Behavior Center in Rockland County, NY and then at Bronx Lebanon Hospital. 

Dr. Lombard is also a widely-acclaimed author of popular nonfiction works related to the effects of nutrition and the brain, including the Brain Wellness Plan; Balance Your Brain, Balance Your Life and Freedom from Disease. He is also a sought after speaker in the topics of neurology, psychiatry and genomics and has appeared as a guest on numerous TV and radio programs, including Larry King Live, TedMed, CBS News, the Food Network, and with Dr. Mehmet Oz.

Dr. Gina Nick

Dr. Nick is a renowned doctor who has been in private practice for 10 years in Newport Beach, CA where she provided concierge, functional, preventive medicine programs to executives in the Newport Beach community and throughout California. She is a California native who completed her undergraduate degree at UCLA and medical school in Tempe, Arizona. 

Dr. Nick specializes in functional, preventive medicine with a focus on executive health including nutrition, microbiome, hormone replacement, brain optimization, immune function and overall health.  Her practice focuses on truly understanding her clients and helping them prevent functional decline and improve health.

She is known for unparalleled dedication to her clients and their health. Her programs and care focus on identifying the principal cause of health issues and use leading edge treatments and customized recommendations to resolve these issues.

Dr. Nick is a published practitioner, an RMD and recognized speaker for ACAM and other medical organizations.  She has published numerous articles on primary care issue, preventive medicine, hormone replacement, detoxification and nutrition. She holds a seat on the board of directors at Angel Light Academy, a Youth Leadership Organization as well as the California Naturopathic Doctors Association. Dr. Nick was also awarded the Emord & Associates Excellence in Integrative Medicine Award for 2013-2014.

“I really do believe that the anti-inflammatory program at Lifespan Medicine changed our lives for the better and I can’t thank you enough as I know that the changes I made helped me with this pregnancy. The lifestyle changes have also given our little girl the best start she could hope for in life!”

Nicole Visnic, CCN

Nicole Visnic, CCN, is the Ambassador of Nutrition at LifeSpan medicine. Nicole is a featured speaker, media consultant and has a wealth of knowledge on nutrition, weight loss, and various other health topics for our clients. Nicole builds all the LifeSpan medicine programs for our corporate health partnerships. She is an expert in customized nutrition plans involving lifestyle modifications, diet, supplementation and exercise. She excels at helping others reach a health goal they may have from weight loss, to more energy, less inflammation or just feeling and looking better overall.

Nicole enjoys cooking, and utilizes her expertise in the kitchen to provide specialized menus and recipes for clients to fit their individual preferences, allergies and food sensitivities, and overall lifestyles. She is currently working with meal delivery programs and restaurants world wide to provide LifeSpan medicine approved meals and menus. 

She earned her Bachelor of Science in Health Education from Winona State University and her Masters in Human Nutrition from the University of Bridgeport. In addition to her Master’s degree, Nicole is a certified clinical nutritionist.  She has directed corporate wellness programs and has also served as an adjunct professor of psychology at Brown Mackie College. She also practices what she preaches, adhering to a nutritious diet, and continually challenging herself by participating in rigorous events such as the LA Marathon, Orange County Duathlon and NPC Figure Competition.