Thema Brain Health

About our team

Leading neurologists and healthcare professionals.

Our team is dedicated to making the latest advancements in neuroscience accessible to everyone — from advanced diagnostic tools to innovative treatments brought directly to our patients.

Clinical Team

Lorin Graef, MD

Lorin Graef, MD

Chief Medical Officer · Neurologist

Dr. Graef is a neurologist with over 25 years of experience treating patients. He is a graduate of Brown University and Stanford Medical School and completed his postgraduate medical training at Johns Hopkins University and Harvard University.

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Douglas Black, MD

Douglas Black, MD

Neurologist & Sleep Specialist

Dr. Black is a board-certified neurologist and board-certified sleep specialist. He completed his medical and neurology training at the University of South Florida and a fellowship at the University of Vermont.

Nicole Hughes, MSN, APRN

Nicole Hughes, MSN, APRN

Nurse Practitioner · Neurology

Nicole Hughes is a Board-Certified Acute Care Nurse Practitioner with a specialization in Neurology. She holds an MSN from Rush University and a BSN from University of Wisconsin. Her entire advanced practice career has been focused on treating patients with chronic neurological disorders to help them achieve their best quality of life.

Reginee Bromson, MSN, APRN, FNP-BC

Reginee Bromson, MSN, APRN, FNP-BC

Nurse Practitioner · Neurology

Reginee Bromson is a board-certified Advanced Practice Registered Nurse (APRN) specializing in preventive neurology. She earned her MSN from Florida Atlantic University and has spent her career at the intersection of internal medicine and neurology.

Executive Team

Robert Colton, MD

Robert Colton, MD

Co-founder & Chairman

Founder of MDVIP, the country's largest concierge medicine company. Over 30 years of physician experience with expertise in preventive healthcare and medical innovation.

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Seth Harlem

Seth Harlem

Co-founder & CEO

Previously founded Taithera, a biotechnology company. MBA from Columbia University and BA from Trinity College with extensive healthcare industry experience.

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Sam Lehr

Sam Lehr

Co-founder & CSO

Experienced entrepreneur and attorney. Former attorney with Cleary Gottlieb Steen & Hamilton LLP. JD and BA from University of Pennsylvania.

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Medical Advisors

Joseph Ouslander, MD

Joseph Ouslander, MD

Medical Advisor

Professor of Geriatric Medicine and Chair, Department of Integrated Medicine, Charles E. Schmidt College of Medicine, Florida Atlantic University.

Dr. Ouslander holds an MD from Case Western Reserve University, and a BA from Johns Hopkins University.

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Sasha Rackman, MD

Sasha Rackman, MD

Medical Advisor

Assistant Professor of Geriatric Medicine at FAU's College of Medicine, and serves as the Director of the Geriatrics and Healthy Aging Thread in the College of Medicine's curriculum.

Dr. Rackman received his undergraduate degree from University of Wisconsin-Madison and his medical degree from Tel Aviv University's Sackler School of Medicine.

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Visit the clinic

Same-week appointments in Boca Raton.

Modern neurology on the FAU campus — Original Medicare and some Medicare Advantage plans accepted. Call to verify your coverage.

  • 3998 FAU Boulevard, Suite 120
    Boca Raton, FL 33431
  • (561) 918-0003
  • Monday–Friday, 8:30 AM–4:30 PM. Call to inquire about weekend availability.