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This payment option is available to patients associated with Urgent Care Center of Port Orange, LLC, dba Advanced Urgent Care; Town Center Medical Center, LLC, dba Advanced Family Practice; Atlantic Anesthesia Services, LLC; and Advanced Gastroenterology & Endoscopy Centers.
Meet The Team
Meet our dedicated team, committed to providing compassionate, personalized care for your digestive health.
Ammar Hemaidan, MD
Associate Professor of Medicine, Florida State University
Chief and President of the Medical Staff, Halifax Medical Center
Dr. Hemaidan specializes in gastroenterology, hepatology, and internal medicine. He is licensed in the state of Florida and has been practicing medicine for more than 23 years.
A graduate of Aleppo University School of Medicine, Dr. Hemaidan completed his medical training at the University of Texas, Indiana University Medical Center, and St. Helen’s Hospital in Hastings, England.
Dr. Hemaidan serves as Chairman of the Department of Medicine at Halifax Medical Center and Director of the Gastroenterology Department for Florida Health Care Plans. His awards and recognitions include the FMA Distinguished Physician Certificate, multiple listings among “America’s Top Physicians,” the “Top 100 Doctors in America” National Leadership Award, and the AMA Physician’s Recognition Award.
He also serves as Medical Director of Advanced Medical Research Center.
Zachary Neubert, DO, FACP
Clinical Assistant Professor of Medicine, Florida State University
Dr. Neubert is a board-certified physician specializing in gastroenterology and internal medicine. He brings extensive knowledge and experience from 11 years of active-duty service as a physician in the United States Army.
He completed his internal medicine residency at Madigan Army Medical Center in Tacoma, Washington, followed by a gastroenterology fellowship at Naval Medical Center San Diego in San Diego, California. He later served as Chief of Gastroenterology Services at Tripler Army Medical Center.
Dr. Neubert is a member of the American College of Gastroenterology and a Fellow of the American College of Physicians. A native of New Smyrna Beach, he is proud to be back home serving his local community.
Rulz T. Cantave, MD
Internal Medicine
McGill University, Montreal
Halifax Medical Center
After earning a bachelor’s degree in biochemistry from McGill University in Montreal, Canada, Dr. Cantave attended Universidad Iberoamericana (UNIBE) in the Dominican Republic to pursue a career in medicine. He graduated from medical school with honors before moving to Miami, Florida, where he completed his internal medicine residency at Aventura Hospital.
Dr. Cantave then completed a one-year fellowship in geriatric medicine at the University of Miami, Miami VA Medical Center, and Jackson Memorial Hospital. He later returned to Aventura Hospital to complete a three-year fellowship in gastroenterology.
As a member of Advanced Gastroenterology Institute and Halifax Health, Dr. Cantave is proud to work with organizations committed to patient-focused care and serving individuals throughout the region. He is a strong advocate for patient autonomy and a patient-centered approach. Dr. Cantave works collaboratively with each patient to develop an individualized healthcare plan that supports a happy and healthy life.
Eyad M. Swaity, MD
Gastroenterology • Hepatology • Endoscopy • Internal Medicine
Dr. Swaity holds certifications from the American Board of Internal Medicine (ABIM), the National Board of Physicians and Surgeons (NBPAS), and the Royal College of Physicians of the United Kingdom through the MRCP Specialty Certificate in Gastroenterology. He is also certified by the Jordanian Board in both internal medicine and gastroenterology.
Dr. Swaity brings extensive international experience to his practice. He completed his internal medicine residency at NYU-affiliated Woodhull Medical Center in Brooklyn, New York, followed by a fellowship in gastroenterology and hepatology at Jordan University Hospital. He also has a strong clinical background in advanced diagnostic and therapeutic endoscopic procedures.
Before joining Halifax Medical Center and the Advanced Gastroenterology Center team, Dr. Swaity served as a consultant in gastroenterology, hepatology, and internal medicine. He also served as an Assistant Professor of Medicine at the University of Jordan.
Dr. Swaity is committed to providing high-quality, patient-centered care guided by evidence-based practices and the latest advancements in digestive health.
Nancy Braddock, PA
Advanced Gastroenterology
Nancy graduated from Saint Louis University as a Physician Assistant in 2002 and has been practicing in the field of Gastroenterology ever since. Understanding that digestive health impacts every aspect of daily life, she takes an empathetic, patient-centered approach to gastroenterology care. Nancy specializes in helping patients navigate complex GI symptoms—from chronic heartburn to functional bowel disorders—ensuring every individual feels heard and supported throughout their care journey. When not at the clinic, Nancy enjoys gardening and traveling.
Sabrina Gutzvany, APRN
Advanced Gastroenterology
Sabrina Guzsvany, APRN is a double board-certified Family Nurse Practitioner and a Central Florida native. Born at Halifax Hospital, she grew up in Daytona Beach and attended Spruce Creek High School.
Her nursing career has taken her from Medstar Georgetown University Hospital, to working as a travel nurse, and later in the PACU at Cleveland Clinic. She went on to earn her Master of Science in Nursing as a Family Nurse Practitioner from Florida Atlantic University, and is excited to now be practicing gastroenterology in her hometown community.
Outside of work, she is an avid traveler and self-proclaimed foodie. She enjoys spending her free time outdoors, volunteering in her community, home improvement projects, and relaxing with her family and cats.
Jana Jernstrom, DNP, ARNP
Advanced Gastroenterology
Jana Jernstrom is a nurse practitioner dedicated to providing compassionate, patient-centered care. A proud University of Central Florida Knight, she earned three degrees from UCF, culminating in her Doctor of Nursing Practice.
With a lifelong commitment to physical fitness, Jana’s background as a competitive swimmer and former fitness instructor has shaped her appreciation for the role of nutrition, exercise, and everyday habits in supporting long-term health. She brings this passion into her gastroenterology practice, recognizing the important connection between lifestyle factors and digestive health, and their influence on overall well-being. She values patient education and preventive care, empowering her patients to make informed decisions about their gastrointestinal health needs.
Through a compassionate, individualized approach, Jana strives to ensure every patient feels heard, respected, and cared for throughout their healthcare journey.
