Call Us: (713) 426-2400 - Email:

General Surgery Services

Our team of surgeons are trained in the most advanced laparoscopic minimally invasive general surgery procedures.

General Surgery Information  ►

Weight Loss Surgery

Our highly trained bariatric surgeons also offer a wide variety of weight loss surgery options to best fit your needs.

Bariatrics & Weight Loss  ►

New Patient Resources

Download new patient forms and informational packets, and learn more about minimally invasive surgery.

New Patient Information  ►

Specializing in a wide variety of single-incision and advanced laparoscopic procedures.

Welcome to Northwest Houston Surgical Association (NHSA). Our practice is made up of General and Bariatric surgeons, all of whom have specific expertise in advanced laparoscopic surgery.

Also known as “minimally invasive” surgery, laparoscopic surgery is performed without the typical long incision. By making several tiny incisions, surgeons use long, thin surgical instruments and tiny cameras to perform procedures. We perform a full range of laparoscopic surgeries, including weight loss, gallbladder, colorectal, endocrine, anti reflux, hernia and breast surgery. We also offer minimally invasive ultrasound-guided breast biopsies right in our office.

Our goal is to provide excellent, efficient care to our patients. We take pride in maintaining attentive bedside manner, keeping abreast of the most recent and beneficial surgical techniques and staying on the cutting edge of surgical care.

Get In Touch

Our office hours are from 9:00 a.m. to 5:00 p.m. Monday through Friday.


Meet Our Doctors

We’re a dedicated, multi-talented team of surgeons commited to providing excellent, efficient care to our patients . No matter what you need, rest assured knowing we have you covered. Visit the about page to read more about our surgical team.

Dr. Subramanyam Ayyar


Dr. Ayyar has pioneered minimally invasive surgery in the West and Northwest Houston area and is an expert in parathyroid operations.

Dr. Jorge I. Leiva


Dr. Leiva is at the forefront of single incision and robotic general surgery with a special interest in primary and revision, advanced laparoscopic.

Dr. Ziad Amr


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

Back to Top