About
Steven Campbell, MD is Marek Health's Medical Director, a University of Kentucky MD with Ohio State training in Internal Medicine, Pulmonary, and Critical Care Medicine. He is triple board-certified across those fields and adds functional/performance medicine training through IFM, SSRP, and WorldLink. His optimization lens grew from two directions: his own experience with football injuries and refractory IBS, and ICU work during the pandemic that showed how metabolic disease can surface years later as critical illness. At Marek, he emphasizes cardiopulmonary exercise testing, aerobic capacity, metabolic health, and root-cause functional medicine.
Reviews
What to Know
Signature approach
Campbell uses cardiopulmonary exercise testing and aerobic-capacity work as objective inputs alongside labs. The goal is to find conditioning, metabolic, gut, hormone, and recovery gaps early enough to act upstream. His ICU background gives the work a sharper prevention frame: improve the systems that often fail long before they become critical-care problems.
What sets them apart
- Unusual credential stack. Triple board certification in Internal Medicine, Pulmonary Medicine, and Critical Care Medicine, layered with Institute for Functional Medicine training.
- Fitness data in the medical model. His use of CPET gives aerobic capacity a measurable role alongside biomarkers, symptoms, and history.
- Personal plus ICU motivation. Football injuries, refractory IBS, and pandemic critical-care experience all point his practice toward earlier metabolic correction.
Before You Book
- Provider matching. Campbell is both Medical Director and practicing clinician; request him during intake if that match matters to you.
- Testing logistics. CPET is central to his framework, but hands-on exercise testing must be coordinated locally.
- Care format. Marek visits are video-only for US residents and self-pay.
Expertise
Focus areas
Patient types
Protocols & technologies
Conditions treated
7Metabolic syndrome
Hormone imbalances
Endocrine disorders / hormone therapy
Chronic fatigue
Chronic fatigue syndrome
Irritable bowel syndrome (IBS)
Irritable bowel syndrome
Pulmonary hypertension
Pulmonary arterial hypertension
PCOS
Polycystic ovarian syndrome
Low aerobic fitness / deconditioning
Reduced cardiopulmonary exercise capacity
Credentials
Education
MD
University of Kentucky College of Medicine (2012)
AB, Physics
Duke University (2006)
Board certifications
Internal Medicine
ABIM
Board certified in general internal medicine
Pulmonary Medicine
ABIM
Board certified in pulmonary (lung) medicine
Critical Care Medicine
ABIM
Board certified in intensive care / critical care medicine
Residency
Internal Medicine
Ohio State University Hospital
Fellowship
Pulmonary and Critical Care Medicine
Ohio State University
Additional certifications
Certified Practitioner
Institute for Functional Medicine (IFM)
IFM is the leading certifying body for functional medicine; the credential signals systematic training in root-cause assessment across gut, hormones, and metabolic systems.
Certification
Seeds Scientific and Performance Research (SSRP)
SSRP focuses on hormone optimization, performance, and longevity protocols, a common training area in the optimization-medicine field.
Certification
Academy of Preventive and Innovative Medicine (WorldLink)
WorldLink trains physicians in preventive and longevity-oriented approaches that sit outside conventional internal-medicine practice.
Years in practice
14
NPI
1861768988
Affiliations
Medical Director
Other specialists at Marek Health
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