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Christine Hanna

Dr. Christine Hanna

Dr. Christine S. Hanna is an Obesity Medicine Specialist at St. Luke’s Weight Management Center.

Dr. Christine Hanna, DO


Blue Double Quotes

I'm passionate about treating patients as a whole. I like to see patients improve in many aspects, including physical health, mental health, and quality of life.”

– Dr. Christine Hanna

Obesity is a complex medical condition which involves many organ systems. As an osteopathic physician, I emphasize a holistic approach as key to successfully treating an individual. This has framed my outlook in caring for my patients with obesity.


Dr. Maher El Chaar is an active member of the American College of Surgeons (ACS), Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) and American Society of Metabolic and Bariatric Surgery (ASMBS). In addition, Dr. EL Chaar is a member of the national Obesity Action Coalition (OAC). Dr Maher El Chaar is also an active member of the Clinical issues Committee (CIC) of the ASMBS, a committee responsible for the development of guidelines and recommendations for the practice of bariatric surgery.

Dr. Maher El Chaar is a national speaker who presented at multiple national and international meetings and is also a consultant for many leading medical equipment companies in the United States. Dr. El Chaar is very involved in surgical education of medical students and residents and organization of basic and advanced bariatric surgery courses on a regular basis for general surgeons and practicing bariatric surgeons.

Dr. Maher El Chaar published many manuscripts in relation to bariatric surgery and received many research grants. He was recently named as one of America’s Top Surgeons in bariatric surgery. In addition, Dr. El Chaar received a bariatric surgeon of excellence designation by the ASMBS.

Dr. Maher El Chaar currently serves as Co-Medical Director of Bariatric Surgery at St. Luke’s University Hospital in Pennsylvania. The St. Luke’s Weight Loss Center is an MBSAQIP (Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program) accredited center and a center of quality and excellence as designated by many third party payers. The center is a comprehensive center that includes, in addition to the bariatric surgeons, a bariatrician, social workers, dieticians, physician assistants, nurses and a coordinator. The center conducts regular information seminars, support groups and educational courses tailored to bariatric patients. The center performs around 500 cases a year including gastric bypass surgery, sleeve gastrectomy, gastric banding and revisional surgery.

Dr. El Chaar recently published a book answering the 40 most frequently asked questions about weight-loss surgery for patients who have already had surgery and for those considering surgery.

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Dr. Hanna received her medical degree from the Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. After graduation, she completed her residency training in internal medicine at Geisinger Health System, as well as her fellowship in Bariatric Medicine and Clinical Nutrition.

Board Certification

Professional Memberships


In her free time, Dr. Hanna enjoys serving as violinist and pianist during Sunday service at local churches. She loves to experiment with healthy cooking for herself and her family, but also to better assist her patients and colleagues to make healthy eating fun! Dr. Hanna has traveled to Honduras and Mexico on medical mission trips to set-up temporary clinics at local schools to provide health care in underserved villages. She is bilingual in English and Korean.