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* Disclaimer: Result can vary

The testimonials, statements, and opinions presented on our website are only applicable to the individuals depicted, and may not be representative of the experience of others. The testimonials are not indicative of future results or success of any other individuals. In short, surgery involves risk, results may vary from patient to patient and procedure to procedure. WLIAZ referred practitioners cannot guarantee your results will be the same. Click here for terms and conditions.


Free Seminars

Visit one of our FREE Seminars to learn more about the LAP-BAND®, sleeve gastrectomy as well as other surgical weight loss procedures. Our friendly staff will be with you every step of the way.

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Can’t Join Us In Person?

Watch this video seminar to learn why Scottsdale,  Phoenix, and Tucson weight loss patients turn to Weight Loss Institute of Arizona. You’ll hear from team members, learn risks and benefits of weight loss surgery, and discover how we’ll support you throughout the treatment process.

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Meet Our Doctors


Dr. Michael J. OrrisD.O., M.B.A., F.A.S.M.B.S.

Dr. Orris is a partner and one of the lead surgeons at our Phoenix, Tempe, Arrowhead, Tucson and Scottsdale weight loss center locations.


Dr. John J. DeBarrosM.D., F.A.C.S., F.A.S.M.B.S.

A lead surgeon at WLIA, Dr. DeBarros practices a team approach to surgical weight loss in the Phoenix area which includes diet, exercise and education for long term success.


Dr. Jason RichardsonM.D.

A fellowship-trained surgeon, Dr. Jason Richardson has a deep appreciation for the life-changing effects that compassionate care can have on patients.


Dr. Anuj ParikhD.O.

Dr. Parikh believes that a successful bariatric program has 3 key components: appropriate surgery, a supervised diet and consistent exercise.


Dr. Catherine HoD.O.

Dr. Catherine Ho joined the WLIAZ team in 2013. She is a board-certified surgeon and a fellowship trained surgeon specializing in minimally invasive surgery and bariatrics.



Congratulations! You’re ready to take back your life and your health through surgical weight loss. For many of our patients, the natural choice is LAP-BAND® surgery. Our Tucson and Phoenix area patients trust the specialists at Weight Loss Institute of Arizona for this proven procedure, as well as their caring support throughout their weight loss journey. With over 2,000 LAP-BAND procedures performed since 2006, the surgeons at Weight Loss Institute of Arizona are the premier gastric banding specialists in the Southwest.

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Sleeve Gastrectomy

The sleeve gastrectomy procedure involves the removal of approximately 85% of the stomach, reshaping what remains into a tube or “sleeve”. The objective is to limit the amount of food intake without impairing the normal absorption of vitamins and minerals. The surgery can be performed as a first stage procedure (for patients with a very high BMI), or as a stand-alone procedure.

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Gastric Bypass

There are two important components of gastric bypass surgery: restrictive and malabsorptive. Restrictive – Your surgeon permanently reduces the size of the stomach to approximately 2 ounces, limiting the amount of food that can be eaten at one time. Malabsorbtive – The new, smaller stomach is attached to the small intestine at a lower point, bypassing most of the stomach and the beginning portion of the small intestine. This means that digestion will not begin until further down you digestive tract, thus fewer calories are absorbed.

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Calculate Your BMI

Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women

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