A bariatric surgery consultation is not a formality — it is a detailed clinical assessment of whether weight-loss surgery is safe, appropriate, and likely to be effective for you specifically. The surgeon, and often a multidisciplinary team including a dietitian, psychologist, and physician, needs to understand your full medical history, your previous attempts to manage your weight, your current lifestyle, and your psychological readiness for the permanent changes that surgery requires.
The more thoroughly you prepare before this appointment, the more useful the consultation becomes. Surgeons who receive complete information can give you a more accurate assessment of your eligibility, an honest account of realistic outcomes, and a clear picture of the preparation programme you will need to complete before any procedure is scheduled.
This guide covers everything you need to bring, document, and think through before your first bariatric surgery consultation — whether you are attending a public hospital programme in Singapore, a private clinic in Australia, or a bariatric centre of excellence in the US.
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1. Understand What the Consultation Is Assessing
Bariatric surgery is a major elective procedure with lifelong metabolic and dietary consequences. Before any programme accepts you as a surgical candidate, the team needs to confirm several things: that your BMI and comorbidity profile meet the eligibility criteria for surgery, that non-surgical options have been adequately tried, that you do not have contraindications to the planned procedure, that you understand and are psychologically prepared for the lifestyle changes required after surgery, and that your overall health allows you to undergo anaesthesia and major abdominal surgery safely.
In Singapore, the Ministry of Health guidelines support bariatric surgery for patients with a BMI of 37.5 kg/m² or above, or a BMI of 32.5 kg/m² or above with at least one significant obesity-related comorbidity. In Australia, similar thresholds apply, and Medicare may partially fund the procedure through the MBS for eligible patients. In the US, most insurers and programmes use BMI 40+, or BMI 35+ with comorbidities, as the eligibility threshold. Knowing which category you fall into before the consultation helps you understand what the surgeon is evaluating.
The consultation will also establish which surgical procedure is most appropriate for your individual anatomy, medical history, and weight-loss goals — whether that is laparoscopic sleeve gastrectomy, Roux-en-Y gastric bypass, adjustable gastric banding, or one of the newer endoscopic options.
2. Document Your Weight History and Previous Attempts
Every bariatric programme requires evidence that medically supervised or structured weight-loss attempts have been made and have not achieved durable results. Prepare a written summary before your consultation that covers: your highest and lowest adult weights, the approximate timeline of your weight gain, any periods of significant loss and regain (yo-yo cycling), and every structured weight-loss effort you have made — including commercial programmes, medically supervised diets, pharmacotherapy (weight-loss medications), and the outcomes of each.
Be specific about pharmacotherapy. If you have previously been prescribed or tried orlistat, phentermine, naltrexone-bupropion, or GLP-1 receptor agonists such as semaglutide (Ozempic or Wegovy), note the medication, the duration, the maximum dose reached, and the weight change achieved. Many surgeons want to know whether a GLP-1 trial was completed before recommending surgery, particularly for patients with type 2 diabetes.
Also document any physical or musculoskeletal conditions that have limited your ability to exercise — knee or hip arthritis, chronic pain, sleep apnoea causing daytime fatigue — as these are relevant to explaining why conventional approaches produced limited results.
3. Compile Your Medical History and Comorbidity Records
Obesity-related comorbidities are central to the eligibility assessment and to determining the best surgical approach. Before your consultation, gather documentation of any of the following that apply to you: type 2 diabetes (with recent HbA1c results), hypertension (with home blood pressure readings), obstructive sleep apnoea (with sleep study report and CPAP usage data if applicable), non-alcoholic fatty liver disease (NAFLD), polycystic ovary syndrome (PCOS), osteoarthritis, gastro-oesophageal reflux disease (GORD/GERD), and any history of depression or anxiety.
Bring copies of recent relevant blood test results — HbA1c, fasting glucose, lipid panel, liver function tests, kidney function, thyroid function, and full blood count. If you have had an upper gastrointestinal endoscopy in the past few years, bring that report. The anatomy of your oesophagus and stomach matters for procedure selection, and some programmes require an endoscopy before surgery can be confirmed.
If you have a history of abdominal surgery — appendectomy, gallbladder removal, hernia repair, C-section — note the procedure, the year, and whether there were any complications. Adhesions and previous abdominal anatomy affect surgical approach and risk.
4. Build Your Complete Medication and Supplement List
Bring a written list of every medication you take — prescription, over-the-counter, and supplements — including the name, dose, and frequency. This matters for bariatric surgery preparation for several reasons: some medications need to be stopped before surgery, some are contraindicated after certain procedures (for example, NSAIDs such as ibuprofen are generally contraindicated after gastric bypass), and some medications will require dose adjustments as your weight changes post-operatively.
Pay particular attention to diabetes medications. If you are on insulin or sulphonylureas, your surgical team will want to plan for the significant and often rapid improvement in blood glucose control that follows bariatric surgery — doses that were appropriate before surgery can cause dangerous hypoglycaemia shortly after. Similarly, if you are on anticoagulants or antiplatelet agents, these affect anaesthetic and surgical risk and require specific planning.
Include all vitamin and mineral supplements. After bariatric surgery — particularly gastric bypass and sleeve gastrectomy — lifelong supplementation with a bariatric multivitamin, calcium citrate, vitamin B12, vitamin D, and iron is required. Knowing your baseline supplementation helps the dietitian build your post-operative plan.
5. Prepare for the Dietary and Lifestyle Assessment
Most bariatric consultations include a dietary assessment, either at the first appointment or as part of the pre-operative programme. The dietitian will ask about your typical daily eating patterns, meal frequency, portion sizes, liquid calorie intake (sugary drinks, alcohol, juices), snacking habits, emotional eating patterns, and whether you experience loss-of-control eating or binge eating episodes.
Answer honestly. The purpose is not to judge your current habits but to identify the dietary patterns that will need to change after surgery and to establish whether additional psychological support is needed before proceeding. Patients who are not honest during this assessment often struggle more after surgery, because the post-operative dietary requirements are strict and permanent — not a temporary phase.
A health journal used to record your typical daily food intake for one or two weeks before the consultation gives the dietitian real data rather than recalled averages, and demonstrates the self-monitoring mindset that predicts good long-term outcomes after bariatric surgery. (Affiliate link — we may earn a small commission at no extra cost to you.)
6. Questions to Ask at Your Bariatric Surgery Consultation
Bring your questions written down — consultations at bariatric centres cover a lot of ground and it is easy to forget what you wanted to ask. Prioritise these:
- Which procedure do you recommend for me, and what is the clinical reasoning behind that recommendation?
- What is the realistic expected weight loss at one, two, and five years for patients with my profile?
- What are the main risks and complication rates for this procedure at your centre?
- What does the pre-operative preparation programme involve, and how long does it take?
- Will I need a psychological evaluation, and what does that assessment involve?
- What are the lifelong dietary, supplement, and follow-up commitments after surgery?
- Is this procedure eligible for Medisave, MediShield Life, or my private insurance? Can your clinic provide a cost breakdown?
- What is the typical waiting time from today to a confirmed surgery date?
7. What to Bring to the Consultation
Organise the following before your appointment:
- Written weight history — highest and lowest adult weights, timeline of gain, all previous structured loss attempts and outcomes
- Recent blood test results — HbA1c, fasting glucose, lipid panel, liver and kidney function, thyroid, FBC (within the past 6 months if possible)
- Sleep study report — if you have diagnosed or suspected obstructive sleep apnoea
- Previous GI endoscopy report — if you have had one
- Complete medication list — all prescriptions, OTC medications, and supplements
- Records of previous abdominal surgeries — procedure, year, complications
- Food diary — one to two weeks of typical intake recorded honestly
- Your written question list — so you don’t forget under pressure of the consultation
- Insurance or funding documentation — CHAS and Medisave details (Singapore), Medicare card (Australia), insurance pre-authorisation letter (US)
This content is for general preparation purposes only and does not constitute medical advice. Always follow the guidance of your own healthcare provider. In an emergency, call 995 (Singapore), 000 (Australia), 911 (US/Canada), or 111 (New Zealand). Full Medical Disclaimer