Meet the Team

Your Weight Loss Surgery Team

Chestnut Hill Hospital's bariatric surgery program is about so much more than weight loss. It's about helping you make - and maintain - profound changes for lifelong health and happiness.

Led by Philadelphia's own fellowship-trained weight loss surgeon, John Meilahn, M.D., our team features dieticians, psychologists and nurses committed to your total well-being. From comprehensive pre-operative education, through compassionate follow-up care, we're here to support you through every phase of your journey.


Dr. MeilahnJohn Meilahn, M.D.

Dr. Meilahn is a University of Pennsylvania and Johns Hopkins-trained bariatric surgeon who has helped more than 2,000 men and women across the Philadelphia region achieve their weight loss goals.

As a board-certified surgeon and member of the American Society for Metabolic and Bariatric Surgery (ASMBS), Dr. Meilahn is continually refining new, MINIMALLY INVASIVE BARIATRIC PROCEDURES. For patients, these laparoscopic techniques may provide several advantages, including less pain and scarring, and fewer complications for a faster recovery.

Dr. Meilahn also specializes in more complex weight loss procedures. That includes revisional surgery as well as laparoscopic duodenal switch, a less common option that may provide hope to morbidly obese patients.

Member of the Medical Staff


Mary Ellen VolbMary Ellen Volb

Program Coordinator, BSN, RN

Spurred by a personal tragedy, Mary Ellen was determined to explore the field of bariatric medicine through nursing. Now, with more than 10 years of experience caring for bariatric patients before and after surgery, Mary Ellen has found her professional calling.

Prior to nursing, she entered the health care field as a pharmacy technician and worked in both hospital and retail settings for almost 20 years. As her interest in the medical field grew she attended LaSalle University and earned a Bachelor of Science in Nursing in 2004.

As a successful gastric bypass surgery patient herself, Mary Ellen is committed to patient care. Since 2010, she has maintained a healthy weight and active lifestyle. When she is not hard at work, Mary Ellen enjoys the company of her horses and her dog, Raina.


Private Consultation

Free Private Consultation

Schedule a free private consultation with our Bariatric Coordinator.