Center of Excellence Award

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Obesity Surgery Specialists

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Dallas, TX

Irene Preston, MPH, RD, LD
Dietician

Irene is Obesity Surgery Specialists' registered dietician with over 5 years experience in weight management, bariatrics and obesity counseling. Irene’s belief is that successful obesity surgery patient’s not only lose weight, but learn to nourish body and mind for optimum wellness, and a more positive outlook on life. Irene holds a Master's degree from Tulane University and a Bachelor's degree from Texas A&M University.


She is certified by the American Dietetic Association as an Adult Weight Management Specialist.


Lidia Rangel
Insurance Coordinator

Lidia is our insurance coordinator and is responsible for helping our clients through the insurance process. She worked in the Admission Department as an insurance verifier at Renaissance Hospital Dallas for four years before transferring to Obesity Surgery Specialists. She has over six years experience in insurance and is knowledgeable in commercial policies such as Medicare and Medicaid.


Michelle Vasquez
Front Desk Coordinator

Michelle is the front desk coordinator and has been in the healthcare industry for over four years. With experience as a medical assistant and front desk coordinator, she is very familiar with both ends of the clinic. She enjoys being a part of the life-changing experience clients have as they transition from before and after our weight loss program.







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*Renaissance Hospital Dallas and Renaissance Hospital Houston are recognized as Bariatric Centers of Excellence from The American Society for Metabolic and Bariatric Surgery.