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Physician-led, evidence-based care

Every protocol at VITALIS MD is designed and supervised by a board-certified physician and delivered by a dedicated clinical team. No franchised injectors — real medicine, accountable care.

Dr. Marcus Halvorsen, MD
Board-Certified MDAge Management Medicine
Medical Director

Dr. Marcus Halvorsen, MD

Medical Director · Board-Certified in Internal Medicine, Diplomate in Age Management Medicine

Dr. Marcus Halvorsen is a board-certified physician who has dedicated his career to age-management and metabolic medicine. After a decade in internal medicine, he saw too many patients told their labs were 'normal' while they felt anything but — and built VITALIS MD to practice medicine the way he believes it should be: measured, personalised and proactive.

He completed advanced training in bioidentical hormone replacement and metabolic optimization, and he personally reviews every patient's protocol. His philosophy is simple — optimize to the individual, dose conservatively, monitor relentlessly, and explain every number so patients are partners in their own care.

Board certification & credentials

  • Doctor of Medicine (MD) — University of Florida College of Medicine
  • Board-Certified, American Board of Internal Medicine
  • Diplomate, Age Management Medicine (metabolic & hormone optimization)
  • Advanced certification in Bioidentical Hormone Replacement Therapy
  • Member, American Academy of Anti-Aging Medicine (A4M)
  • Florida Medical License ME-149206 · DEA registered
The clinical team

Your care team

Nurse practitioners, clinicians and patient coordinators who deliver and track your protocol week to week.

Elena Vasquez, APRN
Elena Vasquez, APRN
Nurse Practitioner · Hormone & Weight Loss

Elena leads our hormone and medical weight-loss programs, handling titration, monitoring and the week-to-week coaching that keeps patients on track.

Derek Olsson, PA-C
Derek Olsson, PA-C
Physician Assistant · Regenerative Medicine

Derek performs our PRP and regenerative procedures, from orthopedic injections to hair restoration, with a precise, methodical technique.

Priya Nair, RN
Priya Nair, RN
Registered Nurse · IV & Aesthetics

Priya delivers our IV therapy menu and light aesthetic treatments, and is the friendly face most patients see at every visit.

Standards & affiliations

Held to a medical standard

American Academy of Anti-Aging Medicine (A4M)Board-Certified Internal MedicineHIPAA-compliant practiceFlorida-licensed medical clinicAge Management Medicine Group

Meet Dr. Marcus Halvorsen, MD

The best way to understand your options is a free, one-to-one consultation with our care team. No pressure — just honest, physician-backed guidance.

Call (813) 555-0142