Bariatric Surgery: Lasting Results, Healthier Future

Advanced weight loss procedures tailored to your needs, offering life-changing results for long-term health and renewed well-being.

Comprehensive Weight Loss Solutions

Dr. Nguyen specializes in several advanced weight loss procedures tailored to meet individual patient needs and goals. Each surgical option aims to promote substantial weight reduction, address health issues associated with obesity, and significantly improve overall well-being.

Explore our range of bariatric procedures below to discover which approach might be right for your weight loss journey and health transformation.

Bariatric Surgery

Gastric Sleeve: Permanent Reduction, Powerful Results

This minimally invasive procedure removes approximately 80% of your stomach, creating a small sleeve-shaped stomach that limits food intake and reduces hunger hormones.

What happens during surgery?
Using small incisions, your surgeon removes a large portion of your stomach while preserving its natural pathway. The remaining stomach is shaped into a narrow tube or "sleeve" about the size of a banana. The entire procedure typically takes 60-90 minutes under general anesthesia. 

Benefits:

  • Significant and sustainable weight loss (typically 60-70% of excess weight)

  • Reduced hunger sensations due to hormonal changes

  • No rerouting of the intestines or foreign devices implanted

  • Improved or resolved obesity-related conditions like diabetes and hypertension

Gastric sleeve surgery offers a powerful combination of volume restriction and hormonal changes that helps patients achieve lasting weight loss while improving their overall quality of life.

Bariatric Surgery

Gastric Bypass: Metabolic Reset, Dramatic Transformation

This gold-standard weight loss procedure creates a small stomach pouch and reroutes the digestive tract to promote substantial weight loss and metabolic improvements.

What happens during surgery?
Your surgeon creates a small egg-sized stomach pouch and connects it directly to the middle portion of your small intestine, bypassing the rest of the stomach and upper intestinal tract. This dual-approach procedure typically takes 2-3 hours and is performed laparoscopically through small incisions.

Benefits:

  • Dramatic weight loss results (typically 70-80% of excess weight)

  • Immediate improvement in diabetes and metabolic conditions

  • Reduced hunger and increased feeling of fullness

  • Long-term success with proper lifestyle changes

Gastric bypass offers one of the most powerful tools against severe obesity and its related conditions, providing patients with both immediate metabolic benefits and a pathway to long-term health transformation.

Bariatric Surgery

Revision Bariatric Surgery: Corrective Solutions, Renewed Hope

This specialized procedure addresses complications or insufficient results from previous weight loss surgeries, restoring the path to health and weight management.

What happens during surgery?
Your surgeon carefully evaluates your current anatomy and previous procedure to determine the optimal approach, which may involve converting one type of bariatric surgery to another or repairing existing modifications. The procedure’s complexity varies based on your specific situation and typically takes 2-4 hours.

Benefits:

  • Renewed weight loss potential when previous results have plateaued

  • Resolution of complications from prior surgery

  • Improvement of associated health conditions

  • Regained sense of control over eating and satiety

Revision bariatric surgery offers hope and renewed opportunity for those facing challenges after their initial weight loss procedure, providing tailored solutions that address both physical and emotional aspects of the weight loss journey.

Why Choose Bariatric Surgery?

All our bariatric procedures are performed by our highly trained surgical team using state-of-the-art equipment and techniques. We're committed to providing you with the most effective, life-changing weight loss options because we believe you deserve:

  • Significant and sustainable weight loss

  • Improvement or resolution of obesity-related health conditions

  • Reduced need for medications for conditions like diabetes and hypertension

  • Enhanced mobility and physical comfort

  • Improved quality of life and self-confidence

  • Lower lifetime healthcare costs and fewer obesity-related medical visits

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About

Dr. Richard Nguyen

Dr. Richard Nguyen is a board-certified General Surgeon with over 20 years of surgical expertise and fellowship training in Minimally Invasive and Bariatric Surgery from Vanderbilt University. Since establishing his practice in San Jose in 2007, he has pioneered innovative surgical techniques, including single-incision laparoscopic procedures and mastery of the da Vinci Robotic Surgical System. Beyond his acclaimed bariatric surgery practice, he has earned national recognition for his specialized expertise in both non-mesh and advanced mesh hernia repairs, while also serving as a critical approach surgeon for anterior spine access procedures. Dr. Nguyen combines technical precision with personalized care across multiple premier facilities throughout the South Bay Area.

We are affiliated with the following Hospitals/Surgical Centers:

Good Samaritan Hospital, San Jose, CA Los Gatos Community Hospital-El Camino, Los Gatos, CA Silicon Valley Surgery Center, Los Gatos Fremont Surgery Center, Fremont
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Real Clients, Real Results

Hear directly from patients whose lives have been transformed through Dr. Nguyen's surgical expertise and compassionate care. Their success stories inspire our work every day.
Crystal S. smiling one year after gastric sleeve surgery
Crystal S.

I would refer Doctor Nguyen to anyone, in fact I have and they have all had the same experience as me. He is truly great. I owe all my success to Doctor Nguyen and I thank him for all the work he has done for me and continues to do so. He is extremely amazing, and I am very grateful to him.

Lisa Q. standing outdoors following 100‑lb weight loss
Lisa Q.

At 50, I now have a life I had only dreamed of a year before. My body tells me if I am done eating. This surgery is a tool that I have used to the fullest. It is not an easy way out. It still took work. But I honestly know that I would not be living this amazing new life if I didn’t step forward to embrace this life-saving surgery.

Rickie W. celebrating diabetes remission post‑bypass
Rickie W.

Dr. Nguyen has changed my life completely. I feel so much better and I also feel like I’ve got control of my life again…I had high blood pressure, diabetes and cholesterol. I took at least 5 different medications for the past 30 years. NOW, after surgery I take no medications only vitamins!

Your Next Step

Wondering which surgical procedure might be right for your condition? We're here to help you understand your treatment options and develop a personalized surgical plan. Contact our office today to schedule a consultation.

Your path to improved health may be more achievable than you think—with advanced surgical techniques leading to faster recovery, reduced complications, and a significantly enhanced quality of life.

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Frequently Asked Questions

Common questions about bariatric surgery, weight loss procedures, and our comprehensive care approach—everything you need to know about your journey to sustainable weight loss with us.
Why should someone consider bariatric surgery?
  • Bariatric surgery offers life-changing benefits for those struggling with severe obesity. Beyond significant weight loss, it can dramatically improve or resolve many serious health conditions associated with obesity. Research shows that approximately 300,000 deaths in America annually are linked to obesity-related complications, making this intervention potentially life-saving for many patients.

  • Following bariatric surgery, patients typically experience remarkable health improvements, often within just a few months. Medical conditions that may be greatly improved include:

    • Type II Diabetes: More than 90% of patients achieve excellent results, usually within weeks—normal blood sugar levels, normal Hemoglobin A1C values, and freedom from medications, including insulin. No other medical treatment can achieve such profound effects.

    • High Blood Pressure: At least 70% of patients who take medications for hypertension are able to stop all medications and achieve normal blood pressure within 2-3 months after surgery.High Cholesterol: More than 80% of patients develop normal cholesterol levels within 2-3 months following the procedure.

    • Sleep Apnea: Dramatic relief occurs as weight is lost, with many patients completely resolving their symptoms within a year and no longer needing CPAP machines.

    • Joint Pain and Arthritis: Patients typically experience considerable relief from degenerative arthritis and back pain, often with the first 25-30 pounds lost within a month after surgery.

    • Respiratory Problems: Improved breathing ability and exercise tolerance usually occur within the first few months, allowing many patients to participate in activities they previously couldn't manage.

    • Gastroesophageal Reflux Disease (GERD): Relief of all reflux symptoms usually occurs within days of surgery for nearly all patients.

    • Stress Urinary Incontinence: This condition responds dramatically to surgical weight loss and typically becomes completely controlled.

    • Heart Disease: While direct reduction can't be definitively proven, improvements in related conditions like high blood pressure, high cholesterol, and diabetes suggest significant risk reduction.

  • Bariatric surgery is worth considering when traditional weight loss methods have been unsuccessful and your health is at risk due to obesity. Our team is committed to helping you determine if this transformative option aligns with your health goals and personal circumstances.

Who is eligible for weight loss surgery?
  • Candidates for bariatric surgery typically have a body mass index (BMI) of 40 or higher (approximately 100 pounds overweight) or a BMI of 35-39.9 with obesity-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnea. We also consider patients who have tried multiple structured weight loss programs without achieving lasting results. 

  • During your consultation, our experienced surgical team will review your complete medical history, weight loss attempts, and current health status to determine if bariatric surgery is the right option for your unique situation. Our goal is to help you find the most effective path to improved health and quality of life.

When is bariatric surgery considered successful?
  • Bariatric surgery is typically considered successful when a patient loses 50 percent or more of their excess body weight. However, success extends far beyond the numbers on a scale. Many patients experience significant health improvements that can be life-changing or even lifesaving—such as resolution of type 2 diabetes, reduced blood pressure, improved sleep apnea, decreased joint pain, and enhanced mobility.

  • While complete loss of excess weight is uncommon, the health benefits achieved often dramatically improve quality of life and longevity. It's important to understand that bariatric surgery is a powerful tool, not a quick fix. Long-term success depends on your commitment to adopting new lifestyle habits, including regular physical activity, mindful eating patterns, and ongoing follow-up care with our team.

Are there activity restrictions following bariatric surgery?
  • Yes, there are temporary activity restrictions following bariatric surgery to ensure proper healing and optimal results. During your initial recovery period, strenuous activities, heavy lifting, and intense exercise should be avoided to allow your body time to heal properly. However, walking is not only permitted but strongly encouraged as an essential part of your recovery process—it helps prevent complications like blood clots and promotes healthy circulation.

  • We advise patients not to drive while taking prescription pain medications, as these can impair judgment and reaction time. Most patients can switch to over-the-counter pain relievers like Tylenol within a few days after surgery, at which point driving may be resumed if you feel comfortable.

  • During your first follow-up appointment, your surgeon will evaluate your progress and provide personalized guidance about returning to work and gradually increasing activity levels. While recovery varies by individual and procedure type, most patients return to work within three to six weeks after surgery. 

Do insurance companies cover bariatric surgery procedures?
  • Many insurance companies now recognize obesity as a substantial health risk and do provide coverage for bariatric surgery procedures. However, coverage varies significantly between insurance providers and specific plans. Most insurers require documentation of medical necessity, which typically includes:

    • A body mass index (BMI) of 40 or higher, or BMI of 35-39.9 with obesity-related health conditions

    • Evidence of previous structured weight loss attempts

    • Medical records documenting obesity-related health problems

    • Psychological evaluation confirming readiness for surgery

    • Participation in a medically supervised weight loss program

  • We recommend contacting your insurance provider directly to understand your specific coverage details, and our team is always available to help you understand the process and maximize your benefits for these life-changing procedures.

What are the dietary restrictions following weight loss surgery?
  • Following bariatric surgery, you will need to follow a structured dietary progression that allows your newly modified digestive system to heal while providing essential nutrition. This process typically unfolds in several phases over the first few months after surgery:

    • Phase 1 (1-2 weeks): Clear liquids and protein shakes to allow for initial healing

    • Phase 2 (2-4 weeks): Pureed foods with a focus on protein sources

    • Phase 3 (4-6 weeks): Soft foods that are easy to digest

    • Phase 4 (6+ weeks): Gradual transition to regular healthy foods

  • Long-term dietary guidelines typically include eating smaller, protein-focused meals; chewing food thoroughly; separating liquids from solid foods; avoiding sugary, high-fat, and highly processed foods; and staying well-hydrated throughout the day.

  • We strongly recommend working with a registered dietitian who specializes in bariatric nutrition, as professional guidance is crucial for optimal results. Regular consultations with a dietitian can help ensure you're getting adequate nutrition while maximizing your weight loss results.

How soon should I start exercising after bariatric surgery?
  • Exercise is a vital component of your post-surgical recovery and long-term success. Light exercise, particularly walking, should begin almost immediately after surgery—even while you're still in the hospital. These gentle movements promote healing, reduce the risk of blood clots, and help prevent complications.

  • During your first month after surgery:

    • Start with short, gentle walks several times daily

    • Gradually increase your walking distance and time as your energy improves

    • Focus on proper breathing and maintaining good posture

    • Avoid lifting anything heavier than 10-15 pounds

  • By weeks 4-6, many patients can begin incorporating more varied activities as approved by their surgeon. More vigorous exercise will typically be introduced around 6-8 weeks post-surgery, assuming your recovery is progressing well.

  • Exercise offers numerous benefits beyond weight loss—it helps preserve muscle mass during rapid weight loss, improves cardiovascular health, enhances mood through endorphin release, and increases your overall energy levels. Many patients find that regaining the ability to engage in physical activities they once enjoyed is one of the most rewarding aspects of their bariatric journey.

  • During your follow-up appointments, we'll discuss appropriate exercise progression based on your individual healing process and fitness goals. Remember that consistency is more important than intensity, especially in the beginning—creating sustainable exercise habits now will support your weight loss and health improvements for years to come.

How long will it take to lose excess weight after weight loss surgery?
  • Weight loss after bariatric surgery follows a predictable but individualized pattern. Excess weight loss begins immediately after surgery and typically continues steadily for 18-24 months, though individual experiences may vary.

  • During the first three months, patients often experience rapid weight loss as their body adjusts to the surgical changes and reduced caloric intake. Many patients lose 25-35% of their excess weight during this initial phase. The rate of weight loss then typically slows but remains steady through the first year, when most patients achieve 60-70% of their total excess weight loss.

  • Weight loss generally continues at a slower pace during the second year, with many patients reaching their maximum weight loss between 18-24 months after surgery. After this period, weights typically stabilize, and the focus shifts to maintaining the significant results achieved.

  • Several factors influence your specific weight loss timeline, including:

    • The type of bariatric procedure you undergo

    • Your starting BMI and health status

    • Your adherence to dietary guidelines

    • Your exercise routine and physical activity level

    • Your metabolism and genetic factors

  • During your follow-up appointments, we'll monitor your progress, celebrate your milestones, and provide guidance to help optimize your results. Remember that while the scale is one measure of success, the improvements in your health, mobility, and quality of life are equally important achievements throughout this journey.

Is it possible to gain the weight back after bariatric surgery?
  • Yes, it is possible to regain weight after bariatric surgery, though bariatric procedures have an excellent long-term track record for helping individuals with severe obesity maintain significant weight loss compared to non-surgical approaches. Understanding the factors that influence long-term success can help you maintain your results.

  • Most patients reach their maximum weight loss around 18-24 months after surgery. After this period, some degree of weight fluctuation is normal, and minor weight regain (5-10 pounds) is not uncommon. However, substantial weight regain is preventable in most cases with proper adherence to post-surgical guidelines.

  • Key factors that help prevent weight regain include:

    • Consistent adherence to the recommended dietary guidelines

    • Regular physical activity and exercise

    • Attending all scheduled follow-up appointments

    • Participating in support groups or counseling when needed

    • Addressing emotional or stress-related eating patterns

    • Monitoring nutritional intake and vitamin levels

  • Even if some weight regain occurs, it typically represents only a fraction of the original weight loss, and most patients maintain significant improvements in their health and quality of life.

  • Remember that bariatric surgery is a powerful tool, but long-term success depends on your commitment to permanent lifestyle changes. With dedication and proper support, most patients maintain life-changing results for many years.

What are the risks of having bariatric surgery?
  • Like any major surgery, bariatric procedures involve certain risks that should be carefully considered. In general, the more extensive the operation, the greater the potential for complications. Understanding these risks is an important part of making an informed decision about weight loss surgery.

  • Potential surgical complications include:

    • Abdominal hernias (more common with "open" surgery than laparoscopic procedures)

    • Leakage through staples or sutures (rare)

    • Ulcers in the stomach or small intestine

    • Blood clots in the lungs or legs

    • Stretching of the pouch or esophagus

    • Persistent vomiting and abdominal pain

    • Inflammation of the gallbladder

    • Failure to lose weight (very rare)

  • Gallstone formation is a common concern, affecting more than one-third of bariatric patients during rapid weight loss. This risk can be reduced with preventative medication taken for the first six months after surgery.

  • Long-term health considerations include:

    • Nutritional deficiencies (affecting nearly 30% of patients) such as anemia, osteoporosis, and metabolic bone disease, which can be prevented with lifelong vitamin and mineral supplementation

    • Medication restrictions, particularly non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and aspirin-containing products

    • Increased health risks from smoking, which can cause ulcers after surgery

  • For women of childbearing age, pregnancy should be avoided for 18-24 months after surgery until weight stabilizes, as rapid weight loss and nutritional deficiencies can affect fetal development.

  • Modern laparoscopic techniques have reduced many surgical risks, resulting in smaller incisions, shorter hospital stays, and quicker recovery periods compared to traditional open surgery approaches.

What are some other care-related questions regularly asked by patients?
  • How long will I stay at the hospital?

    • Most patients undergoing bariatric surgery will be admitted for a one-night stay and be discharged the following day.

    • Your surgical team will monitor your initial recovery, including pain management, hydration, and mobility.

    • For some patients requiring additional observation, hospital stays can be extended on a case-by-case basis.

  • What can I eat after surgery?

    • During your first week after surgery, you'll follow a full-liquid diet until your initial post-operative appointment, which allows your newly modified digestive system to heal properly.

    • Your bariatric manual contains detailed information about:

      • Dietary progression stages

      • Recommended protein intake

      • Hydration requirements

      • Supplement schedules

  • How do I care for my incisions?

    • For laparoscopic procedures, your incisions are closed with a special medical-grade adhesive.

    • Care instructions:

      • You may shower or bathe the day after surgery

      • No special dressings or bandages are needed

      • Avoid swimming pools and hot tubs for at least 2 weeks

      • Monitor for signs of infection (redness, swelling, discharge, increased pain)

  • When can I drive after my surgery?

    • Do not drive while taking prescription pain medications

    • Resume driving once you've switched to over-the-counter pain relief

    • Most patients return to driving within 1-2 weeks

    • Only drive when you feel comfortable and can react quickly if needed

  • Do I have any medication restrictions?

    • For the first 4 weeks after surgery:

      • Crush medications or take in liquid form when possible

      • Avoid extended-release medications and soft gels

      • Discuss diuretic medications with your physician

      • Consult our team before starting any new medications

  • When can I drink coffee or alcohol?

    • Coffee:

      • Only decaffeinated coffee for the first 4 weeks

      • Caffeine can irritate your healing stomach

    • Alcohol:

      • Generally acceptable after about 4 weeks (varies by patient)

      • Effects may be more intense after surgery

    • Carbonated beverages should be avoided indefinitely.

  • What if I am nauseous after surgery?

    • Nausea management:

      • Take prescribed anti-nausea medications as directed

      • Stay hydrated with small, frequent sips of clear fluids

      • Avoid strong odors

      • Contact our office immediately if you experience persistent nausea or vomiting

  • What if I am constipated after surgery?

    • Constipation is common after surgery. To manage it:

      • Drink at least 64 ounces of fluid daily

      • Take fiber supplements like Metamucil mixed with water

      • Engage in regular light walking

      • Use any prescribed stool softeners

    • Contact our office if constipation persists despite these measures.