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34 Years
experience
Your Trusted Partner for Preventive & Longevity Medicine
LifeSpan Medicine is a pioneering functional medicine practice dedicated to preventive care and longevity optimization. With over three decades of experience, our team of board-certified physicians and specialists employs cutting-edge diagnostics, integrative therapies, and personalized treatment plans to address root causes of health issues. We specialize in hormone optimization, regenerative medicine, and nutritional programs tailored to individual biochemistry, supporting clients in achieving vitality and extended healthspan.

Our concierge model ensures 24/7 access to care coordination, while our commitment to translational medicine bridges research and clinical practice. Recognized for expertise in complex cases, we serve a global clientele seeking non-invasive solutions for chronic pain, cancer recovery, and age-related decline.
Services
Platinum Program Comprehensive Program Regenokine Program Nutrition IV Therapy
Details
  • Year established: 1992
Highlights and features
  • We offer over 30 years of experience in preventive and longevity medicine
  • Our physicians are board-certified in functional and integrative medicine
  • We provide 24/7 concierge medical support for personalized care
  • Our programs combine conventional medicine with evidence-based alternative therapies
  • We utilize advanced diagnostics for precise, individualized treatment planning
What people say
Changed my life Effective treatments Expert care coordination World-class support Non-invasive solutions
Services
Platinum Program
Our Platinum Program offers the highest level of personalized longevity care, featuring global expert-designed therapies for age-related markers. This exclusive annual program includes microbiome optimization, immune system reinforcement, and 24/7 access to medical specialists. Limited to 75 clients worldwide, it combines cutting-edge diagnostics with concierge support to optimize organ function and cognitive health through advanced protocols.
Regenokine Program
The Regenokine Program specializes in non-surgical orthopedic treatments for joint pain and sports injuries. Using autologous therapies like platelet-rich plasma and A2M therapy, we target arthritis, tendonitis, and musculoskeletal injuries. Our approach combines the body's natural healing abilities with advanced technologies to reduce pain and improve mobility for both professional athletes and active individuals.
Nutrition
Our nutrition programs provide customized dietary plans based on individual biochemistry and health goals. Specializing in anti-inflammatory diets and food sensitivity protocols, we address weight management, chronic illness prevention, and performance optimization. Using medical laboratory testing, our experts create sustainable meal plans that improve energy levels, hormone balance, and overall metabolic health through evidence-based nutritional interventions.
IV Therapy
IV Therapy delivers targeted nutrient combinations directly into the bloodstream for maximum absorption. Our customized infusions support immune function, athletic performance, and detoxification using vitamins, minerals, and antioxidants. This treatment addresses fatigue, supports cancer recovery, and enhances cellular health through intravenous delivery of essential nutrients tailored to individual health needs.
Comprehensive Program
The Comprehensive Program offers integrative preventive care focusing on disease prevention and health optimization. Through detailed diagnostics and personalized treatment plans, we address cardiovascular health, hormone balance, and cognitive function. This 24/7 accessible program combines conventional medicine with alternative therapies to correct imbalances, eliminate symptoms, and promote long-term wellness through a holistic approach to patient care.
People
Dr. Chris Renna
Founder & Physician
Dr. Renna established LifeSpan Medicine in 1992 after recognizing conventional medicine's limitations in creating health. Board-certified in family medicine, he pioneered a system combining functional medicine with concierge care, focusing on root cause resolution for chronic conditions and longevity optimization.
Dr. Alison Levitt
Functional Medicine Specialist
Board-certified in family medicine, Dr. Levitt specializes in women's longevity and hormone optimization. With expertise in environmental medicine and regenerative treatments, she develops personalized protocols integrating detoxification, microbiome optimization, and integrative aesthetics to enhance vitality and healthspan.
Dr. Olivia Lesslar
Preventive Medicine Physician
Dr. Lesslar focuses on root cause analysis and integrative treatment approaches. With training in phytochemicals and neuroimmunology, she creates customized programs addressing chronic illness prevention and biohacking, combining conventional medicine with complementary therapies for comprehensive patient care.
Dr. Karen Koffler
Integrative Medicine Expert
A pioneer in integrative medicine, Dr. Koffler combines conventional and alternative approaches for optimal health. Certified in functional medicine and mindfulness-based stress reduction, she develops holistic treatment plans addressing chronic disease prevention and mind-body wellness through evidence-based complementary therapies.
Dr. Melissa Sundermann
Lifestyle Medicine Specialist
Dr. Sundermann integrates traditional internal medicine with functional approaches to optimize mind-body health. Board-certified in lifestyle medicine, she focuses on cellular health, metabolic optimization, and holistic treatments that address chronic disease root causes through personalized, evidence-based interventions.
Questions
What makes LifeSpan Medicine different from conventional medical practices?
We focus on preventive care and root cause resolution rather than disease management. Our integrative approach combines functional medicine, advanced diagnostics, and personalized treatment plans tailored to individual biochemistry and lifestyle factors.
Do you treat patients with chronic conditions?
Yes, we specialize in complex chronic conditions including autoimmune disorders, hormonal imbalances, and neurodegenerative diseases. Our programs address underlying causes through comprehensive testing, nutritional interventions, and regenerative therapies.
Are your treatments covered by insurance?
Most services require private payment as we prioritize personalized care over insurance constraints. We provide documentation for potential reimbursement, but our programs are designed to offer comprehensive care beyond standard insurance-covered treatments.
How are treatment plans developed?
We conduct extensive diagnostic testing and health assessments to create individualized plans. Our physicians integrate genetic, metabolic, and lifestyle factors with functional medicine principles to develop targeted interventions addressing each patient's unique health needs.
Do you offer remote consultations?
Yes, we provide virtual consultations for patients worldwide. Our digital health platform supports ongoing care coordination, remote monitoring, and virtual follow-ups while maintaining the same personalized approach as in-person visits.
What longevity assessment tools do you use?
We employ advanced biomarker analysis, genetic testing, and functional diagnostics including high-fidelity brain MRIs. These tools help identify aging markers and create targeted interventions to optimize cellular health and extend healthspan.