The UF Health Bariatric Surgery Center is a certified center of excellence. UF Health fellowship-trained bariatric surgeons collaborate with UF Health experts from psychiatry, cardiology, pulmonology, medicine, nephrology, endocrinology and nutrition as they strive to identify and resolve the extensive health problems associated with morbid obesity.

Bariatric Team

Jeffrey FriedmanJeffrey Friedman, MD
Director and Bariatric Surgeon
Alexander Ayzengart Alexander Ayzengart, MD
Bariatric Surgeon
Crystal Johnson-Mann, MDCrystal Johnson-Mann, MD
Bariatric Surgeon
  • Gwen Crispell, RN,MSN, CBN
    Bariatric Nurse Coordinator
  • Tamara Lux, PA-C
    Physician Assistant
  • Stephanie Stevens
    Clinical Coordinator
  • Tina Adams
    Clinical Coordinator
  • Alba Osorio, MS, RD, LD/N
    Registered Dietitian 
  • Tisha Redondo
    Clinical Coordinator

Anesthesia & Critical Care



Neurology/Sleep Medicine

Nutritional Services

  • Kristin Drake, RD
  • Alba Osorio, MS, RD, LD/N

Pediatric Endocrinology

Pediatric Surgery

Plastic Surgery


  • Allison Holgerson, Ph.D.