Dallas-Fort Worth clinics›LifeSpan Medicine

LifeSpan Medicine

Dallas · Concierge preventive and functional medicine practice

LifeSpan Medicine's Dallas office is part of the concierge practice Dr. Chris Renna founded in 1992. The practice runs two programs: a Comprehensive Concierge evaluation and a Platinum year capped at 75 clients, joined by referral. Platinum diagnostics include functional brain MRI and cognitive-risk panels, with a Regenokine joint and spine arm. People come here for brain health, gut health, and emerging care.

Care team 10 named clinicians Medical leadership published by LifeSpan Medicine, for the organisation

Where3400 Carlisle Street #460, Dallas, TX 75204

Who operates it

The care team

Every clinician the operator publishes by name, with their role exactly as the operator states it.

Medical leadership is published by LifeSpan Medicine, not for this location.
LifeSpan Medicine runs three offices, Santa Monica, Dallas and Miami, and publishes its ten clinicians centrally on one team page rather than assigning them to a location, so nobody is named specifically for Dallas. Dr. Levitt's biography lists licences in Florida, Minnesota and North Carolina, which does not include Texas.

Across LifeSpan Medicine

Founder

Dr. Chris Renna, DO

DO.

Medical schoolUniversity of North Texas Health Science Center, medical degree earned cum laude

ResidencyFamily medicine

UndergraduateUniversity of Texas

Clinical focusPreventive and longevity medicine; the practice calls him "world renowned longevity physician" and says he leads the Platinum Program

Published qualifications"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." It adds that he founded LifeSpan medicine in 1992, that he is "a published author, popular public speaker and lecturer", and that the Platinum Program is "led by world renowned longevity physician, Dr Chris Renna".

Physician

Alison Levitt, MD

Board-certified in Family Medicine and licensed in Florida, Minnesota and North Carolina. Texas is not among the states listed.

Medical schoolMD, University of Vermont

ResidencyMAHEC, Asheville, North Carolina

Clinical focusTherapeutic plasma exchange (TPE), hyperbaric oxygen therapy (HBOT), ozone therapy, peptides and regenerative treatments for joints, skin and sexual health

Published experienceOver 20 years of clinical leadership in Family, Functional, Regenerative and Environmental Medicine

Physician

Dr. Olivia Lesslar, MD

MBBS from Bond University, Queensland, Australia.

Published qualifications"an Australian-educated and trained doctor with a passion for preventative medicine, integrative medicine". It states she "has her medical degree from (MBBS) Bond University in Queensland Australia, after completing an undergraduate degree in International Relations with a triple major including French and diplomacy", holds "certificates in remedial therapies including herbs, nutrition, and acupressure" and "an Advanced Certificate in Skin Cancer Medicine", and "has worked with the Neuroimmunology Associates of New York".

Physician

Dr. Laura Caldwell, MD, ABEM, ABLM

Board-certified in Emergency Medicine and Lifestyle Medicine.

Medical schoolUniversity of Vermont College of Medicine; summa cum laude, Wellesley College

ResidencyYale University

Prior roleNational media at ABC’s World News Tonight and strategy consulting at Bain & Company before medicine

Clinical focusPrecision medicine, personalized health optimization and longevity-focused care

Preventive and functional medicine physician

Dr. Paris Whitney, DO

Board certified functional medicine practitioner and board certified family physician.

Medical schoolUniversity of North Texas Health Science Center; undergraduate degree, Texas A&M University

ResidencyUC Davis Medical Center / Mercy Methodist Hospital

Prior rolePioneered the functional medicine program at Cleveland Clinic alongside Dr. Mark Hyman; joined LifeSpan Medicine in 2023

Professional societiesAOA, ABOIM, IFM, AAFP and ABFM

Physician

Dr. Melissa Sundermann, DO, DipABLM, FACLM

Double-board certified in Internal Medicine and Lifestyle Medicine.

Published qualifications"Dr. Sundermann earned her medical degree in Internal medicine from Michigan State University. She is double-board certified in Internal medicine and Lifestyle medicine." It states she practised at Integrated Health Associates and "most recently, Canyon Ranch in Lennox, Massachusetts", and is "an active member of A4M, IFM and the American College of Lifestyle Medicine".

Non-surgical orthopedics and regenerative treatments

Dr. Moshe Ben-Roohi, MD, FAAPMR, DABPM

Double board certified in Physical Medicine and Rehabilitation and in Pain Medicine.

Medical schoolTel-Aviv University’s Sackler School of Medicine

ResidencyNYU Medical Center and Hospital for Joint Diseases, where he served as Chief Resident

FellowshipInterventional Spine and Sports Medicine

Professional societiesAMSSM, NASS, ISIS, ICMS, AAOM, IFM and AAPMR

Clinical focusAdvanced non-surgical orthopedics and regenerative treatments for sports injuries, degenerative joint disease and conditions of the spine

Therapist

Dr. Mary Dohrmann, PHD-C, LPC, NCC, RPT, C-PAT

Licensed professional counsellor with a Ph.D. in Counseling Education and Supervision. The team page writes the post-nominals as "PHD-C, LPC, NCC, RPT, C-PAT".

Medical schoolPh.D. in Counseling Education and Supervision; graduate degree, Regis University; undergraduate, Colorado Christian University

Additional trainingPsychedelic-assisted therapy, Ketamine, Psilocybin and MAPS MDMA Therapy training

DistinctionExperienced herbalist and yoga therapist

Nutritionist

Rachel Swanson, MS, RD

Registered dietitian with a master's in nutrition from NYU.

Medical schoolMaster’s in nutrition and a registered dietetic degree, NYU

Prior roleBegan her career with the New England Patriots, providing team nutrition programs

Professional societiesCalifornia Academy of Nutrition and Dietetics, Dietician in Integrative and Functional Medicine, and the American College of Sports Medicine

Clinical nutrition

Dr. Kathy Xydis, DCN, CNS, LDN

Doctorate in Clinical Nutrition, Certified Nutrition Specialist and Licensed Dietitian Nutritionist. The team page writes it as "DCN, CNS(R), LDN".

Published qualifications"With a Doctorate in Clinical Nutrition and dual certification as a Certified Nutrition Specialist and Licensed Dietitian Nutritionist, Dr. Xydis merges rigorous academic training with years of hands-on clinical experience." Her published areas are listed as gut microbiome rebalancing and postbiotic therapies, targeted detoxification including mold and mycotoxins, cellular longevity and mitochondrial protocols, metabolic and GI axis optimization, and hormonal resilience strategies.

Published by LifeSpan Medicine at organisation level · source ↗

Tests and services

Everything LifeSpan Medicine lists

4 tests and services across 8 kinds of care

People come here for

Whole-body baseline, Medical weight loss, Brain & cognition, Gut & digestive health and Advanced diagnostics & emerging care.

Advanced laboratory testing & biomarkers

Labs & biomarkers

Named as a kind of care, without a specific test.

Brain & cognitive assessment

Imaging & screening

Brain MRI with volumetrics: Measures brain structure against your age group.

Advanced & emerging care

Advanced therapies

PRP injections: Your own concentrated platelets injected for joints, skin or scalp.

Gut & digestive testing

Labs & biomarkers

Gut microbiome testing: Profiles gut bacteria to guide digestive care.

Preventive screening & executive assessment

Imaging & screening

Named as a kind of care, without a specific test.

Medical weight programs

Medical treatment

Named as a kind of care, without a specific test.

IV therapy & injections

Medical treatment

IV vitamin therapy: Vitamin and fluid infusions marketed for energy and recovery.

Lifestyle & performance planning

Lifestyle & programs

Named as a kind of care, without a specific test.

Also published by this clinic

In the clinic's own words, not yet matched to a category we can compare across clinics.

Radio Frequency AblationSteroid Injections: Joint and SpineTrigger Point InjectionsBracingDetoxification programs

Pricing and payment model

What the clinic publishes

Comprehensive Concierge program and Platinum Program

What’s included

These come with a concierge program rather than being treatments in their own right, and the practice publishes them as program benefits.

24/7 access to your medical team
A coordination team the practice describes as providing support 24/7
In nutrition programs: meal plans, shopping lists, food selections and restaurant menu choices, with ongoing support

Prices may change. Confirm inclusions and current fees directly with the clinic.

Visiting