Bariatric Surgery

When patients are obese, it can be very difficult to lose weight, particularly enough weight to dramatically change a health condition. Bariatric surgery includes a variety of procedures to help obese patients lose dramatic amounts of weight. In the various bariatric surgeries performed by our surgeons at Northwestern Surgical Associates, changes are made to the patient’s stomach or small intestine, or both.

A variety of long-term studies have shown these procedures to be effective for creating significant long-term weight loss, recovery from diabetes, improvement in cardiovascular risk factors, and a extending life.

Dr. Jeffrey S. Fronza and Dr. Daniel Davila perform laparoscopic roux-en-y gastric bypass and laparoscopic sleeve gastrectomy surgery. They believe weight-loss surgery must be tailored to the patient’s needs and desires with the surgeon’s thoughtful guidance. Patients interested in bariatric surgery are seen in consultation at NSA's office in the Arkes Family Pavilion at Northwestern Memorial Hospital.

Northwestern Surgical Associates is part of a MBSAQIP accredited center of excellence at Northwestern Memorial Hospital. It has a proven track record of caring for the bariatric patient through the preoperative, perioperative, and postoperative process. MBSAQIP data consistently demonstrates that their patients achieve superior weight loss compared to patients cared for at other accredited centers and cared for by other surgeons.

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Dr. Fronza and Dr. Davila perform all their bariatric procedures at Northwestern Memorial Hospital. All patients are evaluated in a multidisciplinary fashion in partnership with the Center for Lifestyle Medicine at Northwestern Memorial Hospital.


Prior to your consultation, you should determine if you are eligible for surgery and if your insurance covers bariatric surgery.

  • You must have a body mass index of 40 or higher to be eligible for surgery.
  • If you have a body mass index between 35 and 39 and you have at least one medical problem that is made worse by obesity, then you may be eligible.
  • Verify that weight loss surgery is a "covered benefit" by your policy.
  • Verify that Northwestern Memorial Hospital is a part of your coverage (please note: if your insurance does not cover surgery, a self-pay option may be available).

Please contact the office to schedule an initial consultation to discuss the life-changing possibilities of weight-loss surgery.

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