🔬 Before You Decide — The Complete Pre-Surgery Guide

Am I A Candidate?

Bariatric surgery is not a cosmetic procedure. It is a medically indicated intervention for obesity-related disease. Standard candidacy guidelines are established by the NIH and ASMBS, though programs may vary in how they apply them.

General Candidacy Criteria

• BMI of 40 or higher — without obesity-related comorbidities
• BMI of 35 or higher — with one or more significant comorbidities such as type 2 diabetes, hypertension, sleep apnea, or joint disease
• BMI of 30–34.9 — may qualify with severe comorbidities; discuss with your surgeon and insurance
• Age — most programs require 18 or older; adolescent programs exist with specific criteria
• Previous weight loss attempts — most programs require documented non-surgical weight loss attempts
• Psychological readiness — ability to understand the permanent nature of surgery and commit to lifelong follow-up
• No active substance use disorder — programs vary; full evaluation required

Sleeve vs Bypass vs Other Procedures

No single procedure is right for every patient. The decision should be made collaboratively with your surgeon based on your specific anatomy, health history, comorbidities, and goals. Here is an honest overview of the primary options.

Gastric Sleeve (Sleeve Gastrectomy)

• Approximately 75–80% of the stomach is removed, creating a narrow tube or sleeve
• No intestinal rerouting — digestion pathway unchanged
• Reduces hunger hormone (ghrelin) production significantly
• Simpler procedure than bypass, shorter operating time
• Cannot be reversed — the removed stomach is gone permanently
• May worsen acid reflux in some patients — discuss if you have GERD
• Expected excess weight loss: 60–70% at 2 years

Gastric Bypass (Roux-en-Y)

• A small stomach pouch is created and connected directly to the small intestine, bypassing most of the stomach and upper intestine
• Both restrictive and malabsorptive — changes how food is absorbed
• Generally produces greater weight loss than sleeve
• Often improves or resolves type 2 diabetes rapidly — sometimes before significant weight loss
• Higher nutritional deficiency risk due to malabsorption — lifelong supplement compliance is non-negotiable
• More complex surgery with longer recovery
• Expected excess weight loss: 70–80% at 2 years

Duodenal Switch (BPD-DS) and SADI-S

• Most aggressive malabsorptive procedures — highest weight loss potential
• Reserved for patients with very high BMI or severe metabolic disease
• Highest nutritional deficiency risk — requires the most rigorous lifelong supplementation
• Not offered at all centers — requires highly experienced surgical team

Adjustable Gastric Band

• An adjustable band placed around the upper stomach — no cutting or stapling
• Least invasive but also lowest long-term success rates
• High revision and removal rates over time
• Largely fallen out of favor at most quality bariatric programs

How To Choose A Quality Bariatric Center

The single strongest predictor of safe bariatric outcomes is not which procedure you choose. It is where you have it done and by whom. Accreditation, surgeon volume, and multidisciplinary team structure consistently correlate with better outcomes in the surgical literature.

MBSAQIP Accreditation — The Gold Standard

The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) is the U.S. gold standard for bariatric center quality. Jointly administered by the American College of Surgeons and ASMBS, MBSAQIP-accredited centers are evaluated on:

• Surgeon qualifications and ongoing training
• Complication tracking and outcomes reporting
• Emergency readiness — ICU availability, experienced anesthesia, bariatric-capable equipment
• Multidisciplinary team structure — dietitian, psychologist, bariatric nurses, exercise guidance, support groups
• Long-term follow-up systems — labs, vitamin management, weight regain support
• Pre-operative education and preparation programs

Surgeon Volume — Ask The Number

Research consistently links higher-volume surgeons and centers with fewer complications, fewer leaks, shorter hospital stays, and better outcomes. Ask every surgeon you consult:

• How many bariatric surgeries have you performed in total?
• How many per year currently?
• How many of my specific procedure specifically?

A surgeon performing fewer than 50 bariatric procedures per year is considered low volume by most quality standards. This is not a disqualifier — but it is information you deserve to have.

The Multidisciplinary Team

Bariatric surgery is not a single-surgeon event. Quality programs include a full team working together. A program that offers only a surgeon and a coordinator is not the same as one with:

• Bariatric-credentialed dietitian (CSOWM) — specialized training in post-surgical nutrition
• Psychologist or behavioral health specialist — pre and post-surgical mental health support
• Bariatric-trained nursing staff — who actually read the chart
• Exercise physiologist or guidance — movement prescription, not just general advice
• Support group infrastructure — ongoing community, not just a pre-surgery class

Long-Term Follow-Up Infrastructure

Programs lacking a defined long-term follow-up system are consistently associated with worse outcomes. Before committing to a program ask specifically:

• What is your follow-up schedule after surgery?
• How long does your program actively monitor patients?
• What happens if I experience weight regain at year three or five?
• Who manages my nutritional labs long term — you or my PCP?

Questions To Ask Your Surgeon — Before You Commit

Print this list. Bring it to your consultation. A quality surgeon welcomes informed patients. A surgeon who seems annoyed by specific questions is giving you important information about the kind of care you will receive.

Surgeon Experience & Outcomes

• Are you board-certified in general surgery?
• Are you fellowship-trained in bariatric or minimally invasive surgery?
• How many bariatric surgeries have you performed total?
• How many per year currently?
• How many of my specific procedure?
• What is your complication rate?
• What is your leak rate for this procedure?
• What is your conversion rate to open surgery?
• What is your 30-day readmission rate?

Program & Accreditation

• Is this center MBSAQIP-accredited?
• What level — Comprehensive or Low Acuity?
• Does your center track and report outcomes to MBSAQIP?
• What does your multidisciplinary team include?
• What is your long-term follow-up schedule?

Procedure Choice

• Why are you recommending this specific procedure for my specific situation?
• What are realistic weight-loss expectations for me specifically?
• What are the risks unique to this procedure?
• How will this affect my reflux / diabetes / joint pain / other conditions?
• If this procedure fails or I need revision — what are my options?

Pre-Operative Preparation

• What testing is required before surgery?
• Will I need to lose weight before the procedure?
• Do I need psychological clearance?
• What does your nutrition counseling actually involve?
• Which medications need to be stopped before surgery and when?
• Do you require a sleep study?

Hospital Stay & Recovery

• What is the expected length of hospital stay?
• What is your pain management plan?
• When can I walk, drive, return to work?
• What are the warning signs that should bring me to the ER after discharge?
• Who do I call after hours if something feels wrong?

Long-Term Life After Surgery

• What does my vitamin and supplement regimen look like for life?
• How often will I need blood work and for how long?
• What are your weight regain rates at year two and year five?
• What support is available if I experience weight regain?
• What are the most common long-term complications in your patients?

Financial & Logistics

• Do you have insurance specialists on staff?
• What does your program cost if insurance denies coverage?
• What visits are required long term and are they covered?
• Is there a support group and is it active?

What A Quality Program Looks Like In Practice

Beyond accreditation and credentials — quality programs have recognizable characteristics in how they operate and how they communicate.

Green Flags

• No-pressure consultations — you are given information and time, not a sales pitch
• Realistic counseling — they discuss risks, failure rates, and long-term challenges honestly
• Shared decision-making — your goals and concerns actively shape the discussion
• Clear communication systems — you know exactly who to call and when
• Organized pre-op education — structured classes, written materials, clear expectations
• Insurance navigation support — a coordinator who knows the process and helps you through it
• Active support group — real ongoing community, not just a pre-surgery checkbox

Red Flags

• Pressure to decide quickly — any urgency around a permanent surgical decision is a warning sign
• Reluctance to share outcome data — complication rates, leak rates, and readmission rates should be available
• No dedicated long-term follow-up program — a program that ends at six months is not aligned with evidence-based standards
• No psychological evaluation offered — this is a standard component of quality pre-operative care
• Nutrition counseling that consists of a commercial diet book — specific, clinical, surgery-type-appropriate guidance is the standard
• Staff who have not read your chart — providers who do not know your surgical history before entering the room