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Gastric Bypass Surgery for Powerful, Lasting Weight Loss

A time-tested bariatric procedure that helps you lose weight and improve health through lasting change.

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What is Gastric Bypass Surgery?

Laparoscopic gastric bypass surgery reduces the size of your stomach and reroutes part of your small intestine, leading to both restriction and malabsorption of calories. The most common technique, the Roux-en-Y gastric bypass, creates a small pouch at the top of the stomach, which is then connected directly to the mid-small intestine—bypassing most of the stomach and upper intestine.

This approach limits food intake and reduces calorie absorption, resulting in significant weight loss. Most patients return to light activities within 10 to 14 days.

3D illustration of a stomach after gastric bypass surgery, showing the small pouch connected directly to the small intestine, bypassing the lower stomach.
Candidates

Is the Gastric Bypass Right for You?

Gastric bypass surgery may be the right option if you have a body mass index (BMI) of 35 or higher, or a BMI over 30 with obesity-related health conditions such as type 2 diabetes, hypertension, or sleep apnea. It’s especially beneficial for patients who have tried diet and exercise without lasting success and are ready for a long-term solution.

Calculate Your BMI​
  • BMI of 35+ (or 30+ with medical conditions)
  • Struggled to lose weight with diet and exercise
  • Experiencing obesity-related health issues
  • Willingness to commit to long-term lifestyle changes
  • Seeking a permanent, effective weight loss solution
Benefits

Why Choose Gastric Bypass?

The Most Effective Surgery for Weight Loss

Time and time again, gastric bypass leads the way in total weight loss and long-term success.

Fewer Issues with Acid Reflux

Unlike the gastric sleeve, bypass surgery often improves or eliminates reflux symptoms rather than causing them.

Decades of Proven Safety

Gastric bypass has been performed for over 50 years, with a well-documented track record of safety and effectiveness.

Gastric bypass PATIENT SPOTLIGHT — Denice

"Life is simply 110 percent better"

After a lifetime of diets, shame, and physical pain, I finally realized I needed real change. Gastric bypass surgery at Eviva gave me more than weight loss — it gave me my life back. I’ve lost 176 pounds, reversed my health issues, and discovered a strength I never knew I had. From needing a cane to hiking national parks, this journey has transformed everything.
Testimonials

Gastric Bypass Before & After

Jon

Gastric Bypass

Denice 

Gastric Bypass

Providers

Providers that perform the Gastric Bypass

Smiling male doctor in a white coat with a yellow tie and blue shirt, sitting in a bright medical office.

Robert Landerholm, MD

Board Certified General Surgeon, Bariatric & Advanced Minimally Invasive Surgery

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Profile picture of Dr. VanderWel wearing scrubs in front of blue background

Brandon VanderWel, MD

Bariatric & Metabolic Surgeon, Board Certified General Surgeon

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Mimi Tan, MD

Bariatric & Metabolic Surgeon, Board Certified General Surgeon

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Our Process

How our Bariatric Surgery Program Works

Step 1.
Schedule a Virtual Consultation

Meet with one of Eviva's world class surgeons to learn which procedure is right for you.

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Step 2.
Intake + Insurance Review 

Your Bariatric Pathway Coordinator (BPC) is here to help every step of the way—navigating insurance approvals, clinical milestones, or walking you through the self-pay process.

Step 3.
Surgery Day

Your journey begins today—and you’re in the best hands. Our streamlined outpatient approach means most patients are home the same day, recovering comfortably and confidently with support from our experienced team.

FAQ

Most Popular Questions

How much weight can I expect to lose with gastric bypass surgery?

Most patients lose about 35% of their total body weight within 12–18 months, depending on adherence to dietary and lifestyle changes.

Yes, gastric bypass is intended to be a permanent procedure, both anatomically and in the long-term changes it supports.

Most patients return to normal activities within 2 to 4 weeks. You’ll follow a staged recovery plan with close support from your care team.

Gastric bypass often greatly reduces hunger due to hormonal changes that affect appetite. Most patients report feeling full with much smaller portions.

Often, yes, if you meet specific medical criteria. Eviva can verify your benefits and walk you through the approval process.

As with any surgery, risks include bleeding, infection, or blood clots. Long-term, you may be at risk for nutritional deficiencies, so follow-up care and supplements are essential.

You’ll follow a structured diet starting with liquids and progressing to soft and then regular foods. Your dietitian will guide portion sizes and food choices to support healing and weight loss.

Yes. Gastric bypass changes how your body absorbs nutrients, so daily supplements like a multivitamin, calcium, iron, and B12 are highly recommended for life.

Gastric bypass both restricts food intake and bypasses part of the intestine to reduce calorie absorption, while gastric sleeve only reduces stomach size. Bypass also has a stronger impact on conditions like diabetes and acid reflux.

Yes, gastric bypass is one of the most effective treatments for type 2 diabetes. Many patients see dramatic improvement or complete remission within months of surgery.

Procedures we offer at Eviva

Our surgeons work closely with you to determine which weight loss procedure best matches your goals, medical needs, and lifestyle. From advanced laparoscopic techniques to non-surgical endoscopic procedures, each option we offer is backed by proven outcomes and long-term success. We also offer revision surgery for patients who’ve had prior procedures and need additional support.

Minimally Invasive Laparoscopic Surgeries

Gastric Sleeve (LapSleeve®)

3D illustration of a stomach after sleeve gastrectomy, showing the reduced, tube-shaped stomach with surgical sutures.
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Gastric Sleeve Resources

  • Overview: The gastric sleeve, or sleeve gastrectomy, is a laparoscopic procedure where approximately 80% of the stomach is removed, leaving a tubular “sleeve” that limits food intake.

  • How It Works: By reducing stomach size and removing the hunger-inducing hormone-producing part (fundus), it decreases appetite and promotes satiety.

  • Benefits: Patients typically experience a 25–30% total body weight loss. The procedure also improves conditions like type 2 diabetes, hypertension, high cholesterol, and sleep apnea.

  • Ideal Candidates: Individuals with a BMI over 35. It is also frequently performed on BMI between 30–35.

  • Recovery: Most patients go home the same day. Recovery involves a staged diet starting with liquids and gradually progressing to solids over several weeks.

Gastric Bypass

3D illustration of a stomach after gastric bypass surgery, showing the small pouch connected directly to the small intestine, bypassing the lower stomach.
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Gastric Bypass Resources

  • Overview: Gastric bypass is a laparoscopic procedure that alters both the stomach and small intestine to reduce food intake and calorie absorption. A small pouch is created at the top of the stomach and connected directly to the small intestine.

  • How It Works: The procedure limits how much food you can eat and bypasses part of the intestine to reduce calorie absorption. It also influences hormones involved in hunger and blood sugar regulation.

  • Benefits: Patients may lose 30–35% of their total body weight. Gastric bypass has strong results for resolving type 2 diabetes, GERD, and metabolic syndrome.

  • Ideal Candidates: Individuals with a BMI over 35, especially those with type 2 diabetes, severe acid reflux, or complex metabolic conditions.

  • Recovery: Most patients go home the same day. Recovery includes a gradual diet progression and routine follow-ups for long-term support.

Gastric Band (LapBand®)

3D illustration of a stomach with an adjustable gastric band in place, showing the band around the upper portion and connected to a port.
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Gastric Band Resources
  • Overview: The lap band involves placing an adjustable silicone band around the upper portion of the stomach, creating a small pouch to restrict food intake.
  • How It Works: The band creates early satiety by limiting how much food the pouch can hold. The tightness of the band is adjusted through a port placed under the skin.
  • Benefits: Less invasive with no stomach cutting or stapling. Adjustable and reversible. Typically results in 15–20% total body weight loss.
  • Ideal Candidates: Patients who prefer a reversible option or who may not qualify for sleeve or bypass procedures.
  • Recovery: Same-day discharge is common. Return to work within a few days. Band adjustments are performed in the clinic as needed.

Non-Surgical Endoscopic Procedures​

Endoscopic Sleeve Gastroplasty (Endosleeve)

3D illustration of a stomach after endoscopic sleeve gastroplasty (ESG), showing internal sutures reducing the stomach volume without surgical removal.
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Endosleeve Resources
  • Overview: The lap band involves placing an adjustable silicone band around the upper portion of the stomach, creating a small pouch to restrict food intake.
  • How It Works: The band creates early satiety by limiting how much food the pouch can hold. The tightness of the band is adjusted through a port placed under the skin.
  • Benefits: Less invasive with no stomach cutting or stapling. Adjustable and reversible. Typically results in 15–20% total body weight loss.
  • Ideal Candidates: Patients who prefer a reversible option or who may not qualify for sleeve or bypass procedures.
  • Recovery: Same-day discharge is common. Return to work within a few days. Band adjustments are performed in the clinic as needed.

Gastric Balloon

3D illustration of a gastric balloon placed inside the stomach to aid weight loss.
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Gastric Balloon Resources
  • Overview: A gastric balloon is a temporary device inserted endoscopically and filled with saline to occupy space in the stomach and limit food intake.
  • How It Works: The balloon takes up stomach space, promoting earlier satiety and reducing meal sizes. It is removed after approximately six months.
  • Benefits: Non-surgical and reversible. Can aid weight loss of 10–15% of total body weight when combined with lifestyle changes.
  • Ideal Candidates: Individuals seeking short-term weight loss support or those preparing for another procedure like surgery.
  • Recovery: Minimal downtime. Patients may experience nausea or discomfort for the first few days. Normal activities resume quickly.

Revision​ Procedures

Laparoscopic & Endoscopic Revision

Gastric Revision 3d Stomach
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Revision Resources

  • Overview: Revision surgery involves modifying or converting a previous weight loss procedure—such as converting a Lap Band to a Sleeve or Bypass—when initial results are inadequate or complications arise.

  • How It Works: Depending on the patient’s history and current needs, the revision may involve removing or modifying existing devices, reshaping the stomach, or rerouting the intestines.

  • Benefits: Offers a second chance at weight loss success. Can resolve issues such as inadequate weight loss, band slippage, reflux, or weight regain.

  • Ideal Candidates: Patients who had prior bariatric surgery but experienced complications, minimal results, or weight regain.

  • Recovery: Varies by procedure. Most are still performed laparoscopically with a focus on minimal downtime and tailored aftercare.

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