BASS Bariatric Surgery Center | Obesity Surgery Specialists

Are you looking for Weight-Loss surgery?

Obesity is a serious disease with too many negative side-effects that shouldn't be overlooked. We are here to help you eliminate obesity and live the lifestyle you deserve!

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About the BASS Bariatric Surgery Center

California Weight Loss Surgery Center with clinics in Walnut Creek and Brentwood

Our weight-loss doctors at the BASS Bariatric Surgery Center have been performing bariatric weight-loss surgery since 2002. They have performed more than 2,000 bariatric operations and our patients have had excellent life-changing results. Our patients have lost more weight than the national average and our complication rate is significantly lower. Our bariatric surgeons’ experience, teamwork, and attention to detail have helped to ensure successful outcomes for our patients.

Bariatric Procedures

Bariatric Surgery & Obesity Specialists | Weight-Loss Surgery Center clinics in Walnut Creek and Brentwood California
Weight-Loss Procedure

Gastric Sleeve

In a sleeve gastrectomy (gastric sleeve), a majority of the stomach is separated and removed from the body. The gastric sleeve involves removing a portion of the stomach.

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Weight-Loss Procedure

Gastric Bypass

In the roux-en-Y gastric bypass, the surgical team at BASS Medical Group partitions the stomach, creating a small upper pouch and a large lower pouch referred to as the gastric remnant.

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Weight-Loss Procedure

Gastric Band

Commonly known as the lap-band, a rubber-like ring containing an inflatable balloon is placed around the upper part of the stomach and affixed in place. This creates a small stomach pouch similar to the small pouch created surgical lyin the gastric bypass procedure.

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Weight-Loss Procedure

Duodenal Switch

This procedure begins with a sleeve gastrectomy. The valve that releases food to the small intestine is left, along with the first part of the small intestine, called the duodenum. The surgeon then closes off the middle section of the intestine and attaches the last part directly to the duodenum.This is the duodenal switch.

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Patient Success Stories

Bariatric Surgery & Obesity Specialists | Weight-Loss Surgery Center clinics in Walnut Creek and Brentwood California
Before Surgery
After Surgery

My Weight-Loss Surgery Success Story

My name is Denise. I started my weight-loss journey in December of 2014 by visiting Dr. Chin. It was ten months of doctors’ appointments, weigh-ins, and medical tests. But I was focused and determined. Finally, my surgery date came. I was sleeved in October 2015, and it was the best decision I have ever made for myself. I was 57 years old at the time. I asked my surgeon, Dr. Chin, if I was too old for the surgery, and he said, “No one is too old to get healthy.” He was so very right. I was 310 pounds at my heaviest, pre-surgery. I was pre-diabetic, and had high blood pressure. My back, knees, and ankles hurt most of the time, and I was always short of breath. Those were just the medical conditions I had because of my weight. I was self-conscious and depressed. I was very unhappy. Surgery was a piece of cake (no pun intended). I was walking on the treadmill within two days. Soon, I was amazed at the transformation I was having, both in my weight loss and with my attitude towards food. As the weight loss kept happening, I was gaining my health back. I am no longer on blood pressure medicine, and I am no longer pre-diabetic. My knees, back, and ankles don’t hurt anymore because I am not carrying so much weight. I can walk and move around without being short of breath. My confidence has returned, and I am so much happier now that I am 100 pounds lighter. I swim a mile five days a week, and walk three to four miles every day, and I enjoy it. There are so many accomplishments that have come from losing weight like shopping in the regular size section, fitting in any chair, crossing my legs, not having to ask for an extension on the airplane, and the list goes on. The only regret I have is not having this surgery sooner. I would like to thank Dr. Chin and all of the staff involved in my life saving/changing surgery.

Denise Brown
Past Bariatric Surgery Patient

More Obesity Surgery Success Stories

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Read More Success Stories

Gastric Sleeve Surgery Helps Patient Lose 120 Pounds and Kick Diabetes

Gastric Sleeve Surgery Saved My Life

57-year-old Gastric Sleeve Patient Drops 100 Pounds After Surgery

Is Weight-Loss Surgery Right For You?

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Bariatric Surgery Process

Bariatric Surgery & Obesity Specialists | Weight-Loss Surgery Center clinics in Walnut Creek and Brentwood California

1. Consultation

During the initial consultation, you will visit with Dr. Chin / Dr. Moy to go over your medical history, surgery options and answer any questions. Based on your medical history, the surgeon will determine the tests and clearances needed to proceed with surgery. During the initial consultation, you will also meet with our Program Specialist who will help prepare you for surgery by scheduling all of your pre-operative tests and clearances (to examine the esophagus, stomach and part of the small intestine).

2. Pre-Op Testing

Pre-operative tests and clearances may include a sleep study, EKG, chest x-ray, lab work and consultation with an anesthesiologist. Each patient must have an evaluation by our clinical therapist and an EGD two weeks prior to surgery. In addition, each candidate is required to attend a mandatory patient education class.

3. Surgery

All surgeries are performed at BASS Surgery Center. The nurses will assist with your post-operative nutrition and exercise recommendations. The length of time you spend in the hospital will depend on which procedure you have: gastric bypass, adjustable gastric banding or sleeve gastrectomy. The intragastric balloon is an outpatient procedure.

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Patient Before and After

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BASS Bariatric Surgery Center
Before Surgery
BASS Bariatric Surgery Center
After Surgery

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Reduction of High-Blood Pressure
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Meet our Bariatric Surgeons

Bariatric Surgery Specialists | Weight Loss Surgery Center in Walnut Creek and Brentwood
bariatric weight-loss doctor brian t. chin

Brian T. Chin, MD, FACS

Bariatric Surgeon

Doctor Biography

Dr. Brian Chin was born and raised in the Bay Area. After graduating from Acalanes High School in Lafayette he ventured cross-country to coastal Maine, where he graduated magna cum laude from Bowdoin College with a bachelor’s degree in physics and mathematics. From there, he went on to earn a master’s degree in applied physics from Columbia University. He earned his medical degree at the University of Michigan Medical School, then returned to California for his surgery residency at the University of California at San Diego, where he won the Department of Medicine’s Halasz Award for surgical consultation and the Department of Surgery’s Chairman’s Prize for teaching and service excellence. Additionally, he served as administrative chief resident. Following residency, Dr. Chin completed a fellowship in bariatric and advanced laparoscopic surgery at the University of California at San Francisco, working alongside world-renowned leaders at the forefront of laparoscopic surgery. Dr. Brian Chin is board certified in surgery by the American Board of Surgery and in advanced trauma life support by the American College of Surgeons. Dr. Chin also serves as a trauma surgeon at the John Muir Medical Center, which is certified as a level II trauma center by the American College of Surgeons and is Contra Costa County’s only trauma center. He sees patients in Walnut Creek and Brentwood.

bariatric weight-loss doctor jason f. moy

Jason F. Moy, MD, FACS

Bariatric Surgeon

Doctor Biography

Dr. Jason Moy is a graduate of the University of Michigan, where he earned both his undergraduate degree from the Honors College and Master of Public Health degree in molecular epidemiology from the School of Public Health. Dr. Moy received his medical degree from Michigan State University. Following medical school, he completed a surgical residency at William Beaumont Hospital. There, in addition to surgical training, Dr. Moy was extensively involved in surgical research and had the opportunity to both publish peer-reviewed articles and present at national and international surgical meetings. After completing residency, Dr. Moy continued his surgical training in New York City as a fellow in minimal access and bariatric surgery in a joint program with Cornell Medical College and Columbia University at New York Presbyterian Hospital. In New York, Dr. Moy trained with pioneers in laparoscopic and bariatric surgery, Drs. Michel Gagner, Alfons Pomp and Dennis Fowler. He also continued surgical research, publishing multiple times, including a paper on laparoscopic sleeve gastrectomy technique. At Columbia, Dr. Moy was appointed a clinical instructor of surgery. Dr. Moy is an advanced laparoscopic surgeon, practicing the full scope of general surgery, bariatric surgery, and trauma surgery.

What our patients are saying

Excellent 4.8 out of 5 star rating
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Great Doctors!

Dr. Jason Moy performed by bariatric surgery last month.  I did enormous study on the surgery including watching 90 hours of video on YouTube.  Concerned about the surgery Dr. Jason Moy had an excellent bedside manner.  He is an excellent listener and very patient.  His staff is impeccable.  His confidence shown in me and the procedure remedied my nerves.  After surgery I was expecting some of the maladies I learned about after bariatric surgery.  To my surprise and because of an excellent surgery, I had minimal pain off pain meds next day, no sore throat or other irritable symptoms. I knew I was fortunate.  Fortunate to have an excellent doctor and surgeon.  If you plan to change you life and go in a better direction and get bariatric surgery I would expect you would want the best surgeon and doctor available.  I suggest you call Dr. Jason Moy.  I am sure there are other great doctors but if you are looking for a sure thing then it is Dr. Jason Moy.

Ann Gon
Bariatric Surgery Patient

My Self-Esteem Improved!

I am extremely grateful for the surgery Dr.Brian Chin was able to complete. My health and self-esteem has improved since my surgery. Dr. Brian Chin is an amazing doctor and I recommend that everyone suffering from obesity and depression go see him and know that he will take care of.

Elsie Slavitz
Bariatric Surgery Patient

Life Changing Surgery

I underwent Gastric sleeve surgery with Dr. Chin not long ago. I had a wonderful experience. The process for this Bariatric weight-loss surgery was made very smooth by Dr. Chin's great staff and the preparation and advice from Dr. Chin. I would highly recommend Dr. Chin to anybody thinking about having a life changing weight-loss surgery, he's one of the best Bariatric Doctors/Surgeons in the East Bay.

Deborah Wilkerson
Bariatric Surgery Patient
dr brian chin with bariatric surgery patient before surgery begins
BASS Bariatric Weight-Loss Surgery Logo

Life after Bariatric Surgery

After surgery, you will be admitted to the hospital. Most patients spend just one night in the hospital, and are discharged home the day after surgery. Because the operations are all performed laparoscopically, the pain tends to be very well controlled with pain pills taken by mouth. Some patients have “gas pain” which can take a day or two to fully dissipate. It’s very important to be upwalking the day of surgery as soon as you have recovered from anesthesia-this will not only help alleviate some of the gas pain, but will also minimize the chance of developing blood clots in the legs (deep venous thrombosis, or “DVT”).

You will be started on sips of water followed by clear liquids the day of surgery. If clear liquids are tolerated well, you will be advanced to full liquids (soups and broths) the day after surgery. The nurses will continue to encourage you to be up and around in the halls as much as possible.

Once at home, you will stay on the full liquids for about two weeks after surgery. You should try to continue to walk every day, a little farther each day as you regain your energy level. You will see your surgeon about two weeks after surgery for a follow-up appointment. If you are doing well at that time, you will be allowed to start trying some soft solid foods.

Most patients take about two to six weeks off from work, depending on the type of work they do. Those with desk jobs generally go back to work after about two weeks or sometimes even sooner, if they are feeling well. Patients whose jobs require a lot of strenuous physical activity will need to refrain from heavy physical activity for six weeks, though they can go back to limited light duty sooner, if their jobs allow. Likewise with exercise, patients should be walking every day and gradually increasing the amount of activity. You can start going back to the gym to lift weights, swim, etc., after about four weeks.

You will see your surgeon at 3 months, 6 months, and 12 months after surgery, then yearly after that. At each visit, we will assess how you are doing, monitor the progress of your weight loss, and check blood tests to make sure your vitamins, minerals, and nutritional parameters are normal. All patients take a multivitamin for life, and some patients need additional supplements depending on the results of their blood tests. If you have any questions or concerns regarding your diet, our nutritionists will be available for consultation.

Upcoming Events

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Introduction to Bariatric Surgery, with Doctor Chin

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Introduction to Bariatric Surgery, with Doctor Chin

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Introduction to Bariatric Surgery, with Doctor Chin

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Bariatric Surgery & Obesity Specialists | Weight-Loss Surgery Center clinics in Walnut Creek and Brentwood California
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Frequently Asked Questions for a Bariatric Surgeon

Are you considering bariatric weight-loss surgery? Below are a series of frequently asked questions about bariatric surgery. The surgeons at BASS Bariatric Surgery Center have been providing weight-loss treatments to patients throughout the San Francisco, Bay Area and East Bay for nearly 20 years. Our experience gives us a clear insight into the questions and concerns of patients seeking a solution to their obesity. We are here to help. Have a question that you do not see addressed below? Contact us to schedule a consultation.

What constitutes being obese?

There are several ways in which obesity is defined. One of the most commonly used methods is by BMI, or body mass index. The BMI is a measurement based on your height and weight. There are many “BMI calculators” available online which allow you to easily determine your BMI. Use our BMI calculator at the top of this page.

What weight makes one a candidate for bariatric surgery?

A person who has a BMI greater than 25% is considered overweight. If your BMI is great than 30%, you are considered obese. If your BMI is greater than 40, or if it is greater than 35 and you suffer from an obesity-related medical problem such as sleep apnea, hypertension, diabetes, etc., you are considered morbidly obese,at which point you are a candidate for bariatric weight loss surgery.

How long does the recovery process take after bariatric surgery?

After surgery, most patients are able to return to work within just one to two weeks, and are able to return to regular exercise after 4-6 weeks. Your surgeon at BASS Medical Group will work with you to create a post-bariatric surgery plan.

How much weight does one lose after weight-loss surgery?

The results of bariatric weight loss surgery are truly amazing. Patients can generally anticipate losing 50-70% of their excess weight. Studies show that the weight loss after surgery is not temporary, but is permanent, unlike after dieting. The amount of weight you lose is dependent on which weight loss surgical procedure you and your physician choose, and how well you adopt healthy eating and exercise habits. Just as important as the weight loss, is that there is an excellent chance obesity-related medical problems, such as diabetes, hypertension, sleep apnea, etc., will improve or completely resolve.  In addition, patients following weight loss surgery report feeling much more energetic, active, and generally able to do many things they were unable to do prior to surgery.

Will my insurance cover bariatric surgery?

The answer to this question depends on your insurance plan. However, in most cases, insurance companies cover weight-loss surgery providing you meet certain medical criteria. One of our patient coordinators at BASS Medical Group can help determine whether your insurance company covers weight-loss surgery, and can also help determine what, if any, out-of-pocket costs will be associated with bariatric surgery.

How does weight-loss surgery improve overall health?

There are many health risks associated with being overweight, especially if you suffer from morbid obesity. Weight-loss surgery can significantly improve your overall health. Some of the many benefits of weight-loss surgery include:

  • Improvements in energy and self-confidence
  • Reduction in high blood pressure and high cholesterol
  • Reduction in risk for heart disease
  • Reduction or elimination of sleep apnea
  • Reduction in Type 2 Diabetes
  • Reduction in Gastroesophageal reflux disease (GERD)
  • Reduction in Asthma
  • Reduction in Urinary Incontinence

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