In short: Before bariatric surgery, check three things and ask about five more. Check the surgeon (certified by the American Board of Surgery, with a license in good standing), the center (accredited by the American College of Surgeons’ MBSAQIP program) and the team (dietitian, behavioral health and long-term follow-up). Then ask which procedure fits you and why, what the risks are, how complications are handled day and night, what follow-up and vitamins you will need for life, and what the whole process costs. This page explains each step with sources from ASMBS, the American Board of Surgery and the MBSAQIP standards, and ends with a checklist you can print.

New to the options? Our bariatric surgery guide explains the operations and who they are generally considered for, and our weight-loss procedures comparison sets surgery, endoscopic procedures and balloons side by side. Our guide to finding a bariatric surgeon shows where to search for surgeons and accredited centers; this page is the list of questions to take into the consultation once you have found them. InstaTuck does not rank or refer to surgeons, and this is general education: only a surgical team that has evaluated you can say whether surgery is right for you.
Bariatric surgery in the U.S., in numbers
- 270,089metabolic and bariatric procedures estimated in 2023ASMBS
- About 0.1%risk of death, with major complications about 4%; both vary by procedureASMBS 2025 fact sheet
- About 34,000surgeons currently certified by the American Board of SurgeryAmerican Board of Surgery
- Nearly 1,000U.S. and Canadian sites that have gone through MBSAQIP accreditation reviewAmerican College of Surgeons
Checked on October 7, 2026
Three stages to plan for
- Before the first visitWrite down your weight and health history, medicines and goals; check the surgeon's certification and the center's accreditation.
- At the consultationAsk about the procedure options, the team, the risks, follow-up, vitamins and the full cost.
- Before you agree to a dateGet written answers and estimates, check your insurance rules, and plan help at home and the years of follow-up.
Before the first visit: what to write down
Programs usually start with an information session or consultation. Walking in with your history written down means nothing important gets missed, and it helps you compare programs fairly.
- Your weight history and BMI. The 2022 guidelines from ASMBS and the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) recommend metabolic and bariatric surgery at a BMI of 35 or more, whether or not you have related conditions, and say it should be considered from a BMI of 30 for people with metabolic disease such as type 2 diabetes. Lower thresholds apply to people of Asian descent. These are general criteria, not a personal recommendation. Our BMI calculator is a starting point only.
- Health conditions. Diabetes, high blood pressure, sleep apnea, reflux, heart, lung, kidney or liver disease, blood clots and past abdominal surgery all affect which procedure is suggested.
- Every medicine and supplement. Include any GLP-1 medicine such as Wegovy or Zepbound. The labels warn about breathing stomach contents into the lungs under general anesthesia or deep sedation, so the surgical and anesthesia teams need to know.
- What you have tried. Diets, programs and medicines, with dates. Medicare’s national coverage policy, for example, asks for a BMI of 35 or more, at least one related condition and previous unsuccessful medical treatment.
- Your insurance details. Ask your plan in writing what it requires before approval. Our insurance guide lists the questions to ask.
- Life plans. Pregnancy plans matter: clinical guidelines advise avoiding pregnancy for 12 to 18 months after surgery.
How to check credentials: the surgeon, the center, the team
ASMBS says medical organizations recommend that surgery be done by a board-certified surgeon with specialized experience or training in bariatric and metabolic surgery, at a center with a multidisciplinary team for follow-up care. You can check most of this yourself, for free, before the first appointment.
1. The surgeon: board certification
The American Board of Surgery (ABS), founded in 1937, says its website is the primary source to verify a surgeon’s certification status. Its check a certification tool answers “Is my surgeon board certified?” A certified surgeon has completed at least five years of training after medical school, met the ABS training requirements and passed its exams; to stay certified, surgeons must keep up continuing education and practice improvement and pass an online assessment every two years. The ABS also offers a Focused Practice Designation in metabolic and bariatric surgery; under the 2026 MBSAQIP standards, surgeons who hold it automatically qualify as MBSAQIP-verified. Also confirm that the surgeon holds an active license with your state medical board, and look for any public disciplinary actions it lists.
A directory listing is not verification. Membership in ASMBS, searchable through its find a provider directory, shows involvement in the specialty, but it is not the same as board certification or center accreditation.
2. The center: MBSAQIP accreditation
The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP), a program of the American College of Surgeons whose standards are written with ASMBS, reviews inpatient and outpatient centers through independent, voluntary peer evaluations. You can look up accredited centers with the ACS hospital search, and ASMBS notes that some insurers require MBSAQIP accreditation. Its 2026 standards took effect on July 1, 2026, replacing the 2022 version. Accreditation lasts three years, after a site visit, and centers report on compliance every year in between.
Accreditation comes in levels, and the level tells you which patients a center is set up for. Comprehensive Centers care for adults and can perform every ASMBS-endorsed procedure. Low Acuity Centers and accredited outpatient surgery centers are limited to adults aged 18 to 65 who meet selection rules; at Low Acuity Centers these include a BMI under 55 for men and under 60 for women, no organ failure or transplant, and no previous weight-loss surgery (apart from band or port revisions and emergencies). Teenagers need a center with adolescent qualifications. Each level also has a minimum yearly case volume:
| Item | Value |
|---|---|
| Comprehensive Center (stapling procedures) | 50 procedures |
| Low Acuity Center | 25 procedures |
| Ambulatory Surgery Center | 25 procedures |
| Adolescent Center (stapling procedures) | 15 procedures |
Adolescent Centers below 15 stapling cases need an MBSAQIP-verified co-surgeon on each case. Volume is one requirement among many, not a measure of quality on its own.
Source: American College of Surgeons, Optimal Resources for Metabolic and Bariatric Surgery, 2026 Standards (checked on October 7, 2026)
The standards also set requirements for the surgeon who leads the program (the MBS Director), who must be “MBSAQIP-verified”. Other surgeons at the center may seek verification but don’t have to, so it is fair to ask whether yours is verified.
What MBSAQIP asks of a verified surgeon (2026 standards)
- 100lifetime stapling procedures, documented in an operative log (up to 75 may come from fellowship)ACS, MBSAQIP 2026 Standards 4.2
- 25stapling procedures a year on average during each three-year cycleACS, MBSAQIP 2026 Standards 4.2
- 8 hoursof metabolic and bariatric continuing education a year, on averageACS, MBSAQIP 2026 Standards 4.2
- 3 yearshow long verification lasts before it must be renewed with the center's reaccreditationACS, MBSAQIP 2026 Standards 4.2
Checked on October 7, 2026
3. The team
Accredited centers must give access or referral to registered dietitians, licensed behavioral health professionals (psychologists, psychiatrists or social workers), physical or exercise therapists, nurses or advanced practice providers, and a consistent operating room team. They must have bariatric call coverage 24 hours a day, 365 days a year, and offer supervised support groups at least every two months. Ask to meet the team, or at least to know who they are.
- Are you certified by the American Board of Surgery? Do you hold the Focused Practice Designation in metabolic and bariatric surgery, or MBSAQIP surgeon verification?
- Is this center MBSAQIP accredited, and at which level? Does that level fit my age, BMI and health?
- Where did you train in bariatric surgery, and how many of the procedure you suggest for me do you do each year?
- Who is on my team (dietitian, psychologist or counselor, exercise specialist, obesity medicine doctor), and when will I see each of them?
- Who answers the phone at night and on weekends after I go home?
Questions about which procedure, and why
The sleeve made up 58.2% of an estimated 270,089 U.S. procedures in 2023 and gastric bypass 23.4%, according to ASMBS; revisions of earlier operations were 11.9%. The 2026 MBSAQIP standards ask each surgeon’s patient education to cover all procedure options the center offers, the center’s own case volume for each, national outcome data from the MBSAQIP registry, and a clear explanation of the goals, risks, benefits and alternatives of each procedure as part of informed consent. That gives you the right to ask for numbers. Our pages on the gastric sleeve and gastric bypass, and sleeve vs bypass compared, help you follow the answers.
- Which procedures do you offer, and which do you suggest for me? Why that one, given my health, reflux, diabetes and plans?
- How many of each did this center do last year, and how do your results compare with the national MBSAQIP data?
- Is the operation reversible? What happens if it doesn’t work as hoped?
- What are the alternatives, including an endoscopic sleeve, medicines, or waiting?
- How much weight do people like me usually lose, and how much do they usually regain over time?
Questions about risks and complications
ASMBS’s 2025 fact sheet puts the risk of death at about 0.1% and major complications at about 4%, varying by procedure. In a U.S. study of 65,093 adults across 41 health systems (PCORnet, 2018), major adverse events within 30 days happened after 5.0% of gastric bypasses, 2.6% of sleeves and 2.9% of bands. Over the longer term, the NIDDK says about one in three people needs a follow-up procedure or hospital stay within five years, more often after bypass. Different studies, not a head-to-head comparison:
Accredited centers must have a defined process for spotting warning signs early, and the standards name a fast heart rate, fever, shortness of breath, severe belly pain and vomiting. Your discharge instructions should tell you which of these to call about and when to go to an emergency room.
- What are the most common and the most serious complications for someone like me, and how often do they happen here?
- What do you do to lower the risk of blood clots, leaks and breathing problems?
- Which symptoms after surgery mean I should call you, and which mean an emergency room? If I go to a different hospital, who will they call?
- What should I do about my GLP-1 or other medicines before and after surgery?
- If I need another operation later, will you do it, and what would it cost?
Questions about nutrition, vitamins and follow-up
Surgery is the start of a lifelong plan. Clinical guidelines from AACE, The Obesity Society and ASMBS (2019) describe a staged return from liquids to regular textures over about six to eight weeks, at least 60 grams of protein a day, lifelong vitamin and mineral supplements, and at least 150 minutes of activity a week. ASMBS nutrition guidance (2016) recommends lab checks every three to six months in the first year and then yearly. The MBSAQIP standards require accredited centers to follow every patient at 30 days, 6 months and 1 year, and to keep trying to reach patients every year after that. Our guide to life after bariatric surgery walks through each stage, and our protein calculator gives a general range to discuss with your dietitian.
- What will I eat in the weeks before and after surgery, and who will guide me through each stage?
- Which vitamins and minerals will I need for life, and who orders and checks my labs?
- How many years of follow-up visits are included, and what happens if I move?
- Is there a support group, and when does it meet?
- If weight comes back, what support do you offer, from nutrition help and medicines to revision surgery?
Questions about cost and insurance
ASMBS cites an average cost of about $17,000 to $26,000 (an undated page, checked on October 7, 2026). Medicare covers gastric bypass, duodenal switch and adjustable banding nationally for people who meet its criteria, and leaves the sleeve to its regional contractors; commercial plans vary, and some exclude surgery. Some plans still require a supervised diet before approval, even though the 2022 ASMBS/IFSO guidelines call insurer-mandated preoperative weight loss “discriminatory, arbitrary, and scientifically unfounded”. Our cost hub helps you build a full budget.
- Can I have a written, itemized estimate for the surgeon, anesthesia, hospital, tests, dietitian and follow-up visits?
- What does my plan require before approval, and will your office help with the paperwork?
- What costs will I keep paying after surgery (vitamins, labs, visits), and which are covered?
- Who pays if I have a complication or need a revision?
Red flags
- A surgery date offered before any evaluation, nutrition visit or behavioral health assessment.
- No clear answer about board certification, the center’s accreditation, or who handles complications at night.
- No written plan for follow-up visits, vitamins and lab checks.
- Only one procedure offered, with no discussion of alternatives, or pressure to decide quickly.
- Packages that bundle travel and surgery with nothing arranged for care when you get home.
Printable checklist
Print this page or copy the list into your phone’s notes. Take it to each consultation and write the answers next to each item, so you can compare programs side by side.
Before bariatric surgery: my checklist
Check before the visit
- ☐ Surgeon’s status on the American Board of Surgery’s “check a certification” page
- ☐ Active license with my state medical board, and any public actions
- ☐ Center listed as MBSAQIP accredited in the ACS hospital search, and at which level
- ☐ What my insurance requires before approval, in writing
Bring with me
- ☐ Weight history, BMI and what I have tried before
- ☐ All medicines and supplements, including any GLP-1
- ☐ Health conditions, past surgeries and pregnancy plans
Ask
- ☐ Are you board certified in surgery? Are you MBSAQIP-verified or do you hold the bariatric Focused Practice Designation?
- ☐ What is this center’s MBSAQIP level, and does it fit me?
- ☐ Which procedure do you suggest for me, why, and what are the alternatives?
- ☐ How many of these does the center do each year, and how do results compare with national data?
- ☐ What are the main risks for me, and how are complications handled day and night?
- ☐ Who is on my team: dietitian, behavioral health, exercise, obesity medicine?
- ☐ What do I do about my GLP-1 and other medicines before and after?
- ☐ Which vitamins and labs will I need for life, and who checks them?
- ☐ How many years of follow-up are included? Is there a support group?
- ☐ What is the full written cost, including complications and revisions?
- ☐ Who do I call after hours, and which symptoms mean the emergency room?
Still deciding between surgery and medicines? Our comparison of GLP-1 medicines vs bariatric surgery sets out the evidence, and an obesity medicine doctor can help you weigh options before and after surgery. The find a provider hub explains which professional does what, and our history of bariatric surgery shows how the operations and their safety have changed.












