Meet Our Team
Medical Director Gail M. Wynn, MD, FACS
Gail M. Wynn, MD, FACS is a board certified general surgeon with a special
focus on weight loss surgery and advanced laparoscopic surgery. She is
co-founder of the Christiana Institute of Advanced Surgery (CHRIAS) and
is also the Medical Director of Bariatric Surgery at Saint Francis Hospital.
She has performed over 2000 weight loss surgeries. Along with her partners,
Drs. Irgau and Peters, she is committed to providing excellent surgical
care and a comprehensive surgical weight loss program in a caring, compassionate
Dr. Wynn did her medical training at Southern Illinois University School
of Medicine where she graduated with honors. She completed her surgical
training at the Medical Center of Delaware, and has authored numerous
publications and academic presentations. Dr. Wynn was voted one of Delaware’s
Top Docs for Abdominal surgery from 2007 to 2011 by
Delaware Today magazine. She was also voted Delaware’s Top Bariatric Surgeon from
2011 to 2015.
Isaias Irgau, MD, FACS, FRCS (Ed)
Dr. Isaias Irgau is president and co-founder of the Christiana Institute
of Advanced Surgery (CHRIAS). He has extensive experience with minimally
invasive weight loss surgery. In conjunction with his associate, Dr. Gail
Wynn, he was the first to perform the LAP-BAND® procedure and the
first to firmly establish the laparoscopic approach to Roux-n-Y gastric
bypass in the state of Delaware. Dr. Irgau has personally performed over
2,000 bariatric procedures with excellent results. He and his associate
Dr. Wynn started and established the Bariatric Surgery Program in two
of Delaware’s leading medical centers – Christiana Hospital
and Saint Francis Hospital. With the addition of Dr. Michael Peters Jr.
to CHRIAS, they eventually led the two hospitals to earn the prestigious
designation of Center of Excellence in Bariatric Surgery.
Dr. Irgau graduated from Bristol University Medical School in England and
has a double fellowship with the Royal College of Surgeons of Edinburgh
and the American College of Surgeons. He is board certified in General
Surgery with the American Board of Surgery.
Dr. Irgau is author of numerous publications and academic presentations
and was elected Young Surgeon of the Year by the Delaware Chapter of the
American College of Surgeons in 2006.
Michael Peters Jr., MD, FACS, FASMBS
Michael Peters Jr., MD, FACS, FASMBS is the Medical Director of Bariatric
Surgery for Christiana Care Health System. He is a board certified general
surgeon with fellowship training in advanced laparoscopic surgery and
Dr. Peters received his medical degree from Thomas Jefferson Medical College
in 1998 and completed his general surgery training at the Pinnacle Health
Hospitals in Harrisburg, Pennsylvania in 2003. He completed a clinical
and research fellowship in advanced laparoscopy and bariatric surgery
at the Michael DeBakey Surgery Center of Excellence at the Baylor College
of Medicine in Houston, Texas in 2004 and joined the Christiana Institute
of Advanced Surgery on completion of his fellowship.
Dr. Peters was the first surgeon in the state of Delaware to perform a
sleeve gastrectomy procedure for weight loss. Along with his partners,
he is committed to providing excellent surgical care and a comprehensive
surgical weight loss program in a caring, compassionate environment.
Caitlin Halbert, DO, MS
Caitlin Halbert, DO, MS is a General Surgeon with an interest in Bariatric
and Foregut surgery. After completing a Masters of Science in Biomedical
Sciences, Dr. Halbert received her medical education at the Philadelphia
College of Osteopathic Medicine. She went on to complete her General Surgery
residency training at Christiana Care Health System in Delaware. She then
received specialty training at Stony Brook University Hospital, completing
a fellowship in Minimally Invasive Bariatric and Advanced Gastrointestinal Surgery.
Dr. Halbert specializes in bariatric surgery, including laparoscopic sleeve
gastrectomy and roux-en-y gastric bypass. Her practice also includes foregut
surgery, with a focus on the treatment of achalasia, gastrointestinal
reflux disease, and hiatal and diaphragmatic hernias.
Dr. Halbert is actively involved in national organizations, including the
Society of American Gastrointestinal and Endoscopic Surgery (SAGES) and
the American Society of Metabolic and Bariatric Surgery (ASMBS). She has
authored several publications and has presented at a number of regional
and national conferences.