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Bariatric Surgery Pre-Op Checklist (Australia 2026): 6-Month Step-by-Step Plan

Bariatric surgery preparation is a 6-month + multidisciplinary journey — not a one-week book + go. This checklist captures the 56 action items across 10 phases of the standard ANZMOSS pathway, from initial health insurance check through to the first 6 months post-op + lifelong management.

The Health Desk · Editorial team, aged care + dental + plastic surgery + dermatology + weight-loss + psychology · Updated 14 May 2026 · How we rank · Editorial standards

★Key takeaways

  • ✓56 action items across 10 phases — from 6 months pre-op through to 6 months post-op + lifelong.
  • ✓Total pathway: 12+ months from first consultation to "settled into new normal".
  • ✓Critical: confirm health insurance covers bariatric BEFORE consulting surgeon. Bariatric is widely excluded on basic/bronze/silver policies.
  • ✓Pre-op weight loss + dietitian + psychology assessments are mandatory in any ANZMOSS-aligned pathway. Skip them and outcomes suffer.
  • ✓Bariatric multivitamin starts day-of-surgery and continues for life. Annual blood tests for deficiencies are non-negotiable.

6+ months before surgery — financial + insurance

  • Check your private health hospital cover for "Weight loss surgery" or "Bariatric surgery" inclusion. If not covered, upgrade to gold tier and serve 12-month wait.
  • Confirm your hospital cover is active 12+ months with no waiting periods pending.
  • Compare 2-3 ANZMOSS surgeons via our directory. Request itemised quotes ($7-$15k surgeon fee + $2-4k anaesthetist + $5-12k hospital).
  • Budget for total OOP of $13,000-$25,000 (with cover) or $25,000-$40,000 (without). Plus $2,000-$5,000 pre-op work-up. Plus $500/year for bariatric multivitamin lifelong.
  • Discuss leave entitlements with employer. 1-2 weeks for sleeve gastrectomy; 2-4 weeks for bypass; longer if physical job.
  • Consider income protection insurance if self-employed — surgery downtime + complications can disrupt income.

4-6 months before — surgeon + multidisciplinary engagement

  • Book first ANZMOSS surgeon consultation. Bring: weight history, prior weight-loss attempts, current medications, comorbidities (T2D, sleep apnoea, hypertension, fatty liver), family history.
  • Book second-opinion consultation with a different ANZMOSS surgeon. Different surgeons prefer different procedures.
  • Get GP referral for Chronic Disease Management Plan (CDM) — 5 Medicare-rebated dietitian visits/year.
  • Get GP referral for Mental Health Care Plan (MHCP) — 10 Medicare-rebated psychology visits/year.
  • Book bariatric-specialist dietitian (look for APD credential). Begin pre-op nutritional preparation.
  • Book bariatric-aware psychologist. Screen for binge eating disorder, anxiety, depression that affect surgical readiness.
  • Begin formal pre-op weight-loss program (6-12 weeks structured diet typically required by surgeon).

3 months before — clinical work-up

  • Sleep study (polysomnography) if BMI 35+ or any sleep apnoea symptoms. Surgeon typically requires.
  • Full pathology: lipid panel, HbA1c, fasting glucose, liver function (ALT, AST, GGT), B12, iron, ferritin, folate, vitamin D, thyroid.
  • Echocardiogram if cardiovascular comorbidities.
  • Barium swallow if reflux history or any concerning oesophageal symptoms.
  • Endoscopy (gastroscopy) if reflux history — rule out Barrett's oesophagus (affects sleeve vs bypass decision).
  • Stop any contraindicated medications: SGLT-2 inhibitors (T2D meds) must stop 4 days pre-op due to keto risk. Some anticoagulants need switching.
  • Confirm surgery date with surgeon, hospital, anaesthetist.

6-8 weeks before — pre-op weight loss + practical

  • Begin pre-op Very Low Calorie Diet (VLCD) typically 2-6 weeks of OptiFast or Optislim (~800 calories/day). Shrinks liver to reduce surgical risk.
  • Quit smoking. Surgeons typically require 4-6 weeks smoke-free pre-op + 8+ weeks post-op for wound healing.
  • Reduce alcohol significantly. Many surgeons require alcohol-free 4 weeks pre-op.
  • Begin daily walking program — 30-60 min daily. Improves cardiovascular fitness for surgery + recovery.
  • Arrange post-op transport home from hospital + 2-week post-op support (someone to drive, shop, cook).
  • Prepare home: liquid diet supplies (broths, protein shakes), small portion-controlled containers, bariatric multivitamin.
  • Photograph your starting weight + measurements. You'll appreciate the comparison at 1 year + 5 years.

1-2 weeks before — final preparation

  • Confirm hospital admission time + paperwork. Sign all consent forms.
  • Final liquid-only diet 2 weeks pre-op (per surgeon instruction). Liver-shrink phase.
  • Stop blood-thinning supplements (fish oil, vitamin E, garlic, ginkgo). Aspirin per surgeon instruction.
  • Prepare comfortable post-op clothing (loose, easy to put on with abdominal soreness).
  • Stock home with: protein shakes (Optifast / Optislim / specific bariatric brands), strained broths, sugar-free electrolyte drinks, bariatric multivitamin starter pack.
  • Confirm time off work + arrangements for childcare/pet care during recovery.
  • Photograph "before" weight + measurements + body for personal record.

Day of surgery + first 48 hours

  • Arrive at hospital fasted (typically 12 hours, per anaesthetist instruction).
  • Surgery 60-120 minutes laparoscopically (key-hole). General anaesthetic. 1-2 night hospital stay typical.
  • Post-op: nurse-supervised ice chips → water sips → broth within first 24 hours. NO solids.
  • Pain management: typically paracetamol + short-course opioids. Most patients ambulate within 6 hours.
  • Hospital discharge after demonstrating: walking, fluid tolerance, pain control, surgical incision check.

First 2 weeks post-op — liquid diet

  • Liquid-only diet: water, sugar-free electrolyte, broths, protein shakes (20-30g protein/day target).
  • Bariatric multivitamin daily — START IMMEDIATELY. Critical for preventing deficiencies.
  • Walk daily (30+ min total, can be split). No lifting >5kg.
  • Watch for warning signs: severe abdominal pain, fever, persistent vomiting, shortness of breath → urgent surgical review.
  • Surgeon follow-up appointment week 1-2.

Weeks 3-4 — puréed diet

  • Add puréed foods: blended vegetables, soft scrambled egg, mashed sweet potato, smooth yoghurt, ricotta.
  • Eat slowly — 30+ minutes per "meal" of 1/4 cup. Chew thoroughly even with purées.
  • Continue daily walking + bariatric multivitamin.

Weeks 5-6 — soft foods

  • Add soft foods: well-cooked vegetables, ground beef, soft cheese, soft fruit.
  • Continue small portions (1/4 to 1/2 cup). Stop eating when satisfied (much earlier than pre-surgery).
  • Return to light exercise. No high-impact for 4-6 weeks.

Months 2-6 — normal diet + lifelong management

  • Normal foods in small portions. Protein priority (60-80g/day target).
  • Continue bariatric multivitamin daily — lifelong commitment.
  • Surgeon follow-up at 3, 6, 12 months. Annual thereafter.
  • Full bloods at 3, 6, 12 months: B12, iron, folate, vitamin D, calcium, zinc. Address deficiencies promptly.
  • Re-engage dietitian + psychology as needed for behavioural support.
  • Consider joining a bariatric support group (in-person or online).

Common questions

How long is the total pre-op + recovery process?

6-month pre-op pathway + 6-week immediate recovery + 6-month ongoing recovery + lifelong follow-up. Total active engagement: 12+ months from first consultation to "back to normal life with new eating patterns".

Can I skip the pre-op multidisciplinary work-up?

No. ANZMOSS-aligned surgeons require it — dietitian + psychology + medical work-up is non-negotiable. Skipping leads to worse outcomes + higher complication rates. Some non-ANZMOSS surgeons offer "fast-track" pathways but these are clinically inferior.

What if I gain weight before surgery?

Many surgeons cancel or delay surgery if you gain weight during the pre-op pathway. The pre-op weight loss demonstrates commitment + reduces surgical risk by shrinking the liver. If you're struggling, talk to your surgeon's team — they'll adjust the program.

What if I need to cancel the surgery?

Most clinics offer full or near-full refund of surgeon fees if cancelled 4+ weeks before surgery. Hospital fees may have separate cancellation policy. Private health fund cover typically refundable but check policy. Get this in writing before booking.

What's the worst-case complication?

For sleeve gastrectomy: staple-line leak (1-3% in high-volume centres, 5%+ in low-volume). Presents 3-7 days post-op as fever + severe pain + tachycardia. Requires urgent surgical revision. Mortality 0.2-0.5% overall. Choose a high-volume ANZMOSS surgeon (200+ procedures/year) to minimise risk.

Next step

Browse ANZMOSS surgeons in your city. Compare costs on our gastric sleeve cost guide.