Outcomes after Weight Loss Surgery

Outcomes after weight loss surgery are not uniform between different surgeons and programs. This is true for a wide variety of outcome parameters, including weight loss results (more), leak rates (more), serious complication rates (more), and long-term complication rates such as for acid reflux after gastric sleeve surgery (more).

To understand the magnitude of outcomes variation between different surgeons and programs, consider the recent 2017 study published in JAMA (Journal of the American Medical Association) entitled “Variation in Outcomes at Bariatric Surgery Centers of Excellence” (read abstract). In this study the authors found that the rate of serious complications within 30 days of weight loss surgery varied 17-fold (yes, 17-fold), from 0.6% – 10.3%, across 165 bariatric surgery centers of excellence nationwide.
Outcomes vary between surgeons

Because outcomes are variable, the best measure of quality is a surgeon’s/program’s record of actual patient outcomes.

Our Weight Loss Surgery Outcomes

Dr. Oliak has outcomes statistics for himself since starting his career in 2002 (>2500 operations). Closely tracking his own patient/operation/outcomes data has always been a high priority for him because it enables him to measure his success at fulfilling his #1 goal – achieving great outcomes.

The outcomes Dr. Oliak focuses most on are weight loss results, serious complications, leak, and acid reflux after gastric sleeve. For these outcomes parameters, Dr. Oliak’s statistics rank among the best in the weight loss surgery field.*

Serious Complications
For serious complications within one month of weight loss surgery, using the same methodology as in the JAMA study quoted above, Dr. Oliak’s rate is less than 1%. This statistic ranks in the top decile of the 165 accredited bariatric surgery centers of excellence evaluated in the JAMA study (abstract) quoted above.*

Gastric Sleeve Leak
The most feared complication after gastric sleeve surgery is leak. Dr. Oliak’s gastric sleeve leak rate is 0%. Published studies report the industry average leak rate to be 2.4% (reference), and individual surgeons report leak rates to be as high as 9% (reference).**

Gastric Sleeve Weight Loss
Dr. Oliak’s gastric sleeve patients average 75-80% EWL (excess weight loss) at 1-3 years after surgery. Published studies report the industry average gastric sleeve weight loss to be 55-65% EWL (reference).*

Our gastric sleeve patient outcomes
Our gastric bypass patient outcomes
Our patient testimonials

* Patient results vary after weight loss surgery. The weight loss outcomes quoted on this page are averages – individual patients can lose more or less weight than the average. To read more about the patient’s role in achieving good long-term weight loss success, click here.

** Leaks can occur after gastric sleeve surgery. Past leak rates may not be indicative of future leak rates. Dr. Oliak’s 0% leak rate statistic applies to primary (non-revision) sleeve gastrectomy, primary (non-revision) laparoscopic gastric bypass, LAP-BAND® conversion to sleeve gastrectomy, and LAP-BAND® conversion to gastric bypass.

  • 0%
    leak rate**
  • 76%
    excess weight loss 1 year after sleeve*
  • 67%
    excess weight loss 10 years after bypass*

Learn more about weight loss surgery and our program

Schedule a free, no-obligation consultation with Dr. Oliak in Orange County – Brea or Irvine – today!

Free Consult


Free Consult

Call 714-582-2530 or submit the following information to request a free consult. If you have insurance coverage for weight loss surgery (or are self-pay), and you meet the BMI criteria for surgery, we will schedule you for a 30-40 minute educational consultation with Dr. Oliak.

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