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Specialized Surgery by Dat T. Nguyen, M.D.

Colorectal Surgery Pleasanton, San Ramon, East Bay

Devoted to Helping Patients with Colorectal Conditions

For sensitive medical disorders such as those involving the colon, anus, and rectum, it’s crucial to have a skilled surgeon who is dedicated to restoring comfort and function to the area. One such specialist is Dr. Dat T. Nguyen, a highly skilled and knowledgeable surgeon whose practice focuses on colorectal surgery. Serving Pleasanton, San Ramon, East Bay, Manteca, Stockton, Modesto and the Central Valley, Dr. Nguyen uses the latest minimally invasive laparoscopic technology and other advanced techniques to help treat the full range of colorectal ailments, including:

On top of his extensive history in medicine and deft touch in the operating room, Dr. Nguyen is known as a personable and friendly surgeon that truly cares for his patients. You can read some of his patient's glowing testimonials here. With Dr. Dat T. Nguyen, patients know that they are placing their health in capable, trustworthy hands.

To meet with Dr. Nguyen, make an appointment with our colorectal surgery practice serving Pleasanton, San Ramon and the East Bay.

An Experienced, Innovative Surgeon

Dr. Dat T NguyenHolding certifications from the American Board of Surgery as well as the American Board of Colon and Rectal Surgery, Dr. Dat T. Nguyen is one of the most experienced bariatric and colorectal surgeons in the Bay Area. In his career, he has performed hundreds of weight loss procedures and thousands of other advanced laparoscopic surgeries, and has established a reputation for being both progressive and innovative in his utilization of state-of-the-art technology and scientifically proven techniques.

After graduating from the University of Minnesota Medical School, Dr. Nguyen obtained his post-graduate surgical training at Harbor-UCLA Medical Center. He excelled in laparoscopic surgery and received the Society of Laparoendoscopic Surgeons Resident Achievement Award in 1998. Dr. Nguyen then completed distinguished fellowships in Surgical Oncology at Harbor-UCLA Medical Center and in Colon and Rectal Surgery at the University of Texas Herman Hospital in Houston. He began his medical career as staff surgeon at South San Francisco Kaiser-Permanente in 1999 and founded his private bariatric surgery practice, serving Pleasanton, San Ramon, and East Bay, in 2002.

About the Practice

Our state-of-the-art surgery center offers qualified patients weight loss surgery and colorectal procedures. Over the years, as technology has advanced, bariatric surgery has not only become safer and less invasive, but it has also become more effective in reducing excess weight. Dr. Dat T. Nguyen performs bariatric surgery including laparoscopic Roux-en-Ygastric bypass, laparoscopic adjustable gastric band placement (REALIZE™ Band or LAP-BAND®), and revision of vertical banded gastroplasty at his East Bay practice in Pleasanton.

Dr. Nguyen received the very best training in colorectal surgery, and is highly respected in the field by patients and peers alike. Colorectal surgery is performed to treat cancer as well as other disorders of the colon, anus, and rectum. As one of the first surgeons to use laparoscopy and other advanced technologies in the field, Dr. Nguyen is at the forefront of colorectal surgery. He also teaches surgical techniques to other physicians.

Learn More about Colorectal Surgery Treatments

To learn more about Dr. Dat T. Nguyen and colorectal surgery, contact his Pleasanton practice, serving San Ramon and East Bay, to schedule a consultation.

Weight Loss Gallery

Patient Forms and Info


AfterI was at a point in my life where I didn’t know what else to do because I had tried every diet in the book, and was unsuccessful.

I can’t tell you how much this surgery has changed my life. Since I now have more energy, I am able to keep up with my 5 year old daughter, and I enjoy waking up every day, only to feel lighter and healthier...

Thank you so much for helping me.

- Andreya N.

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Gastric Bypass

Kim Keppel Testimonial

I am very grateful to Dr. Nguyen & the surgery for giving me a new life. I have been amazed how the surgery has positively affected my health in such a short time. Thank you so much to Dr. Nguyen...  I now have hope of living a long, healthy life.

Laproscopic Surgery

D. Steele Testimonial

Dr. Dat Tien Nguyen is a very personable and experienced colorectal and cancer surgeon. In addition to providing excellent surgical care, he is also very interested in the total well-being of his patients. It's hard to find a doctor like Dr. Nguyen.

Colleague's Praise

B.R. Meyerowitz, MD Testimonial

I came to know Dr. Nguyen very well. He is a highly skilled bariatric surgeon, not only for the open procedure but also the laparoscopic, which he mastered very well. He is a conscientious, dedicated physician and an outstanding colleague.