Northwest Houston Surgical Association

General Surgery Options for Those in Houston, TX


When you meet with any of the NHSA surgeons for any type of surgical consultation, they will carefully consider what will help you attain the best possible outcome for you and your lifestyle. They will educate you until they are convinced that you understand the risks and benefits of any type of surgery. Request a consultation online or call our office at 713-426-2400 for more information about how you can take the steps toward improving your life.


NHSA is made up of three General and Bariatric surgeons – all of them with a special interest in advanced laparoscopic surgery. At NHSA, we have the ability to perform more than just weight loss surgery. For example, we can perform minimally invasive ultrasound-guided breast biopsies in our office, for the convenience of our female patients. If it is possible to achieve your surgery through a small incision, rest assured that we can do it.

  • dr-fadner-img
    Meet Our Doctors

    Dr. Fadner

    Dr. Fadner is fellowship trained in Advanced Minimally Invasive Surgery and Bariatric Surgery and offers a wide range of general surgery operations to his patients.

  • Dr. Levia
    Meet Our Doctors

    Dr. Leiva

    A certified General Surgeon at the forefront of single incision and robotic general surgery. Dr. Leiva also has a special interest in primary and revision, advanced laparoscopic.

  • Dr. Amir
    Meet Our Doctors

    Dr. Amr

    As a highly skilled and fellowship trained weight loss surgeon, Dr. Amr is skilled in laparoscopic foregut surgery and bariatric (weight loss) surgery.

  • Dr. Ayyar
    Meet Our Doctors

    Dr. Ayyar

    Dr. Ayyar has pioneered minimally invasive surgery in the West and Northwest Houston area. His expertise in minimally invasive and endocrine surgery allow him to perform parathyroid operations.

Our Houston weight loss surgery team is made up of Subramanyam Manny Ayyar, M.D., Jorge I. Leiva, M.D. FACS, FASMBS and Ziad Amr, M.D. Our doctors aim to help you achieve the life you’ve wanted and are skilled in the most innovative procedures.


The goal of NHSA is to provide excellent and efficient care to our surgery patients in Houston and Cypress, TX. We take pride in keeping updated on the most beneficial surgical techniques and staying on the cutting edge of surgical care. We strive to make life simple for all of our patients.

The surgeons at NHSA perform more than just weight loss procedures, they are trained in various disciplines to provide you with the most comprehensive care possible. The surgeons try to eliminate any extra steps so that you can get the kind of care you need, all in one place.

Our doctors are trained in the most advanced weight loss surgical procedures to date. We specialize in the following:


The term minimally invasive surgery is used to describe abdominal surgery performed without making a large incision though the skin and muscle to open the abdomen. Instead, a scope is inserted though a trochar inserted into the abdomen though a 1/2 inch incision. The abdomen is inflated with CO2 gas to distend it like a tent, allowing visualization of the abdominal organs.

Long hand-held instrument are inserted through smaller trochars and used to perform the surgery, while the surgeon views the inside of the abdomen on a TV screen. Specialized tools such as scissor, graspers, ultrasonic dissectors, and endoscopic staplers facilitate the surgeon’s ability to perform complex intraabdominal surgery using advanced laparoscopic techniques.

If you’re ready to improve your life, request a consultation online or call our office at 713-426-2400 for more information.

Obalon Balloon System Surgery

The Obalon Balloon System helps facilitate weight loss by taking up space in your stomach so you eat less.

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Gastric Band

As one of the more popular procedures, LAP-BAND® surgery gives patients the ability to control their weight by allowing them to feel fuller, sooner.

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Gastric Bypass

Gastric bypass is successful at helping patients achieve and maintain a healthier weight by using sectioning and malabsorptive techniques.

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Sleeve Gastrectomy

A sleeve gastrectomy procedure involves removing about 85% of the stomach and reshaping the remaining portion into a tube or sleeve.

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Duodenal Switch

The Biliopancreatic Diversion with Duodenal Switch (BPD/DS) is a popular procedure for small stomachs combining a lower form of restriction and a high level of malabsorption.

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