Risk

High: major surgery

Trips

One trip

Before flying home

At least 10 days

Follow-up

For life

Not medical advice. Whether this treatment is right for you is a decision to take with a doctor or dentist who has examined you. Talk to your own doctor before you book.

What it is

The main types are gastric bypass, gastric band, gastric balloon and sleeve gastrectomy. They make the stomach smaller, so it feels full sooner and less food is eaten.

It changes how you eat for the rest of your life: weeks of liquid and soft food, vitamin and mineral supplements, and regular check-ups.

Type	What it means
Sleeve gastrectomy	A large part of the stomach is removed, leaving a narrow tube. It cannot be reversed.
Gastric bypass	The top of the stomach is joined to the small intestine, so food bypasses most of the stomach.
Gastric band	An adjustable band around the top of the stomach. It can slip out of place.
Gastric balloon	A balloon placed in the stomach through the mouth, removed after some months. Not surgery, but not risk-free.

Before you book

Talk to your doctor at home before you book: you will need them, or a specialist clinic, for years afterwards.
In the UK, the surgeons' societies for weight-loss and aesthetic surgery jointly ask patients to consult a UK surgeon first.
After a general anaesthetic, the NHS advises having someone stay with you for at least 24 hours: plan not to be alone for the first days, especially abroad.
If you take a GLP-1 injection (semaglutide, tirzepatide) or diabetes medicines, tell the surgeon and the anaesthetist: these drugs slow stomach emptying, which matters under anaesthesia. UK guidance (2025) is to keep taking them and let the anaesthetist plan for it; agree any change with the doctor who prescribes them, not with the clinic alone.
Blood clots: surgery and long flights raise the risk, and so do the combined pill (or a patch or ring with oestrogen), HRT and smoking (NHS). Tell the surgeon about them weeks before the operation and follow their advice on what to stop and when.
If you have a heart stent or take a blood thinner or an antiplatelet medicine (for example clopidogrel), never stop it on a clinic's advice: stopping can raise the risk of a heart attack or stroke (NHS). Agree any change with the doctor who prescribes it; planned surgery may have to wait.
Criteria and waiting lists differ from country to country: ask your GP which criteria apply where you live before paying abroad.

Who it is for

On the NHS, surgery is considered with a BMI of 40 or more, or between 35 and 40 with a condition that might improve with weight loss (for example high blood pressure, diabetes, arthritis, breathing problems). With a BMI of 30 to 34.9 and recently diagnosed type 2 diabetes, an assessment for surgery can also be considered (NICE).
It may be considered with a lower BMI for people of South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean background.
The 2022 guidelines of the American (ASMBS) and international (IFSO) surgeons' societies recommend surgery from a BMI of 35, whatever the other conditions, and say it should be considered from 30 with a metabolic disease such as type 2 diabetes; for people of Asian background, from 27.5.
You must agree to lasting lifestyle changes and regular check-ups. A clinic that operates without checking any of this is a warning sign.

Recovery and travel

Day 0

Surgery
Usually keyhole surgery under general anaesthetic.

Day 2

Leaving hospital
You can usually leave hospital one to three days after surgery.

Day 2

No heavy lifting or strenuous exercise
Increase your activity gradually, as your exercise plan says: the NHS says to start returning to normal activities after 4 to 6 weeks. Ask the surgeon in writing when you can lift, go back to the gym or to a physical job.

Day 10

Earliest flight home
Avoid flying for 10 days after abdominal surgery.

Week 2

From liquids to runny food
First two weeks: water and fluids. Weeks 3 and 4: runny food such as yoghurt or purée.

Week 4

Normal activities
After four to six weeks, start to return to your normal activities. Weeks 5 to 8: soft food.

Week 8

Balanced diet
From week 8: gradually return to a healthy, balanced diet.

Month 18

If you could become pregnant: earliest advised pregnancy
About 18 months after surgery: avoid pregnancy and use contraception until then, and plan the pregnancy with your team (a Chelsea and Westminster NHS hospital leaflet says at least 18 months; the NHS website says 12 to 18 months, until your weight has stabilised).

Year 2

End of the first two years of specialist follow-up
Follow-up at a weight-loss surgery clinic for at least the first two years, then usually a yearly check-up with a GP for the rest of your life, with the vitamin and mineral supplements you are told to take (NHS): agree before you go who will prescribe and test them at home.

Flying home: The CDC advises not flying for 10 days after chest or abdominal surgery.

Trips: One trip, but a long one: at least 10 days before flying home, then two years of specialist follow-up you must arrange at home before you go. If you use a CPAP machine for sleep apnoea, contact the airline well before the flight about medical equipment, carry the machine in your hand luggage (not in the hold), and ask your sleep team for a letter about it (NHS).

Put these steps on your own dates

Risks

Blood clots

Possible after surgery, and long-distance travel soon after adds to the risk.

Stomach leak

A small chance of a leak where the stomach was cut or joined: an emergency.

Other complications

Wound infection, a blocked gut, gallstones, excess skin; a gastric band can slip out of place.

No follow-up

Poor or no access to routine follow-up can lead to weight regain and nutritional deficiencies.

Assessment and choice

Lack of proper assessment before surgery, the wrong procedure, or a different procedure from the one expected.

Red flags

No questions about your BMI, health conditions or eating history before a date is offered.
Surgery booked within days of first contact, or several procedures combined to lower the price.
No named surgeon, or no plan for what happens if you have a complication after you fly home.
Packages that send you home before 10 days.
The clinic says no psychological assessment or dietitian is needed before the operation.
A package promising you can go back to work after one week.
Follow-up limited to a few months of chat or messaging support: the NHS describes follow-up in a weight-loss surgery clinic for at least the first 2 years.
Being told you can keep taking a blood thinner as usual, without a written plan from the surgical team and your own doctor.
A clinic that tells you not to involve your specialist, your transplant team or your doctor at home.
No blood tests or other checks before an operation under general anaesthetic: a pre-operative assessment, often with blood tests, comes first (NHS).

Questions to ask the clinic

Who is the surgeon, how many of these operations do they do a year, and where are they registered?
Which operation exactly, and why that one for me?
Is a dietitian and a psychological assessment part of the preparation?
How many nights in hospital, and who sees me before I fly?
What follow-up is included for two years, and what happens if I have a leak or another complication at home?
Who looks after me in the first 24 hours after the anaesthetic, and what do I tell the anaesthetist? Tell them about every health condition (for example sleep apnoea) and every medicine.
I have a health condition or take medicines: has the anaesthetist seen this before the day, in writing?
I take the combined pill or HRT, or I smoke or vape: what should I stop, and how long before the operation?
I take insulin or other diabetes medicines: who lowers the doses right after the operation, and who adjusts them once I am home?
I take a GLP-1 medicine (semaglutide, tirzepatide): when should I stop or keep it before the anaesthetic?
I had weight-loss surgery before (a band or a sleeve): what does the revision involve, one or two operations, and how many revisions do you do a year?
I have reflux or heartburn and take medicines for it: does it change which operation you advise?
I take medicines every day (antidepressants, thyroid, the pill): who reviews the doses and forms after the operation, and who follows my mental health at home?
When can I drive and lift again? I drive for work (and my diabetes medicines may change).
I take thyroid hormone (levothyroxine): who checks my dose with blood tests in the months after surgery, here or at home?
I take a blood thinner (for example apixaban or warfarin): who plans stopping or bridging it with my own doctor or cardiologist, and from which day?
I have a bleeding disorder (for example von Willebrand disease or haemophilia), or I bruise or bleed easily: who plans the operation with my haematologist, and which blood tests do you do before it? (NHS: tell your specialist team before surgery or dental treatment)

Ask for the answers in writing. A clinic that will not name the person who treats you has answered the first question.

Where to check the clinic

Each country has its own registers of doctors, dentists and clinics. Pick the destination:

The checks that apply everywhere

Talk to your doctor or dentist at home first. They know your history, can tell you whether you need the treatment at all, and you will rely on them afterwards.
Consult the person who will treat you, not a salesperson. Video calls do not replace an examination, and a cooling-off period between consultation and surgery protects you.
Check the doctor's or dentist's registration yourself. Qualifications should be verified independently, not taken from the clinic's website.
Check the clinic's licence. Clinics need an authorisation from the health authority; in some countries a separate one for international patients.
Look for accreditation, but do not rely on it alone. International accreditation bodies list accredited facilities abroad, but accreditation does not guarantee a good outcome.
Get a written plan, quote and contract. A treatment plan and a price should follow an examination by a qualified professional, and a written contract tells you what you can claim.
Know what the price includes. Follow-up care can carry substantial extra fees, and revisions after a complication add to the cost.
Arrange your aftercare at home before you go. Follow-up care might not be easily available at home and may not be covered by your health system.
Get insurance that covers the treatment. Standard travel insurance does not normally cover elective surgery abroad, and an air ambulance home is very expensive.
Plan enough days before flying home. Surgery and long flights each raise the risk of blood clots: the days before flying home matter most after major surgery.
Bring your records home, in a language your doctor at home reads. Doctors at home need to know exactly what was done, with which materials and medicines.
Be careful with agents and holiday packages. Private companies have a financial interest in booking your treatment; the UK government advises caution with websites selling surgery as part of a holiday.

Once you are home

Arrange your follow-up before you book: ask your doctor whether they will provide it after private or overseas surgery, as policies differ between areas and health systems.
Take vitamin and mineral supplements as told, attend every check-up, and keep your operation notes, in a language your doctor at home reads.
Pregnancy: avoid pregnancy for at least 18 months after surgery (a Chelsea and Westminster NHS hospital leaflet; the NHS website says 12 to 18 months) and use contraception during that time; the pill may not protect you enough afterwards, especially after a gastric bypass, so agree a method with your team (NHS hospital leaflet).

What your health system covers after private treatment abroad depends on where you live:

🇬🇧 If you live in the United Kingdom

The NHS (Health and Social Care in Northern Ireland) does not pay for private treatment you choose abroad, and your EHIC or GHIC does not cover planned treatment. Standard travel insurance does not normally cover you if you travelled for elective surgery: you may need specialist cover. If you are on an NHS weight-management programme or a waiting list, discuss your plans with your GP before you decide, and agree how your aftercare will be provided once you are home (NHS).

The NHS is not liable for negligence or failure of treatment abroad, and the Foreign Office cannot usually help: planned treatment is treated as a commercial arrangement. Plan your aftercare and how records will be shared before you go.

🇮🇪 If you live in Ireland

The HSE Cross Border Directive scheme only refunds planned care in another EU or EEA country that is publicly funded in Ireland, with a referral, up to what it would cost in the Irish public system; travel and accommodation are not refunded. So cosmetic treatments, hair transplants and laser eye surgery, which are not publicly funded in Ireland, are outside it. In the EU: Your EHIC does not cover planned treatment in another EU country (EU): it is for care that becomes necessary during a stay. Hospital care with a night in hospital may need the HSE's approval before you go (EU).

Ask your GP before you go how follow-up would work once you are home, and check whether your travel insurance covers planned treatment and its complications: many policies exclude it.

🇫🇷 If you live in France

Purely aesthetic procedures and their follow-up are not reimbursed by the Assurance Maladie, in France or abroad. Other planned care in another EU country is refunded only if it is reimbursable in France, and at most at the French rate: care without a night in hospital, such as most dental care, needs no prior authorisation; send the paid invoices with form S3125 to your CPAM. Weight-loss surgery can be offered in France after preparation with a specialised team: ask your doctor whether you qualify before paying abroad. In the EU: Care with at least one night in hospital (a sleeve, for example; a purely cosmetic operation is never refunded) needs your CPAM's prior authorisation (form S2) before the trip, and the French eligibility criteria, to be refunded (EU). Outside the EU: Outside the EU, the EU rules on refunds for planned care do not apply: planned treatment there is at your own cost (EU).

Ask your CPAM (health insurance office) and your mutuelle (top-up insurer) before you go how care for a complication would be covered once you are home, and check your travel insurance.

🇺🇸 If you live in the United States

Check whether your health plan covers anything abroad: most do not cover planned treatment, and Original Medicare generally does not pay for care outside the United States, with limited exceptions. Consider supplemental cover, including medical evacuation.

Seek care promptly if a complication develops, during travel or after you return, and bring your overseas records in English. Legal recourse abroad may be more limited than in the United States.

🇦🇺 If you live in Australia

Medicare doesn't cover you when you're overseas, reciprocal health care agreements only cover some situations, and basic travel insurance rarely covers medical tourism: get a specialised policy for your procedure, its complications and medical evacuation, and tell your insurers everything. Ask your private health fund whether it pays anything for complications of surgery done overseas, and about waiting periods for treatment at home.

You, your family or your insurer pay for further care or an evacuation. Consular staff can contact your family and give lists of English-speaking hospitals and lawyers, but cannot pay bills or recommend surgeons. Smartraveller advises taking someone with you.

🇳🇿 If you live in New Zealand

Make sure your travel insurance covers complications and medical evacuation, and talk to your health practitioner in New Zealand about the procedure and its risks before you go. ACC does not pay for treatment costs overseas: ask ACC before you go what it would cover if you are injured by the treatment and need care once you are home.

Get copies of your surgical details before you leave: problems can appear once you are home, and your practitioner in New Zealand will need them. Check with a health practitioner before flying after surgery.

🇸🇦 If you live in Saudi Arabia

The Ministry of Health sends patients abroad at its expense only by royal order or on the decision of the High Medical Commission. Planned treatment you choose yourself, such as cosmetic surgery, is private and at your own cost.

Ministry-referred patients are followed by the Saudi health attaché in the country of treatment. If you go privately, nobody follows you: get supplemental insurance that includes medical evacuation before you go (CDC), and ask what it pays for treating a complication, talk to your doctor in Saudi Arabia before you leave, and if a problem starts once you are home, see a doctor at once and bring your records.

🇩🇪 If you live in Germany

Statutory insurance (GKV) can refund planned care from a provider in another EU or EEA country or Switzerland, at most what it would pay in Germany and only for care it covers; hospital treatment needs your fund's approval first (§13 SGB V). Cosmetic surgery is not covered. Private insurance (PKV) depends on your policy: ask before you book. For weight-loss, dental or eye treatment, tell your fund and your doctor at home about any complication. The cost-sharing rule for cosmetic surgery (§52(2) SGB V) is about operations that were not medically needed.

Check your travel insurance for complications, and agree with your doctor at home who will see you afterwards.

🇨🇦 If you live in Canada

Provincial and territorial health plans rarely cover any of the cost of care outside Canada, and then usually only a small part (Government of Canada). In Ontario, OHIP pays for planned treatment abroad only with written prior approval from the Ministry of Health before the treatment, applied for by your doctor, and only if the procedure is not available in Ontario (or a delay would be life-threatening or cause serious irreversible harm); travel, accommodation and meals are never covered. Other provinces have their own rules: ask your plan before you book. Rules differ by province (Ontario's prior-approval rule is above): check your own plan's out-of-country rules, for example BC's MSP, Quebec's RAMQ or Alberta's AHCIP, before you book.

Buy travel medical insurance that covers the treatment's complications and transport home: Ontario encourages it even when the treatment has prior approval. Foreign hospitals can be very expensive and may ask for cash in advance (Government of Canada).

🇳🇴 If you live in Norway

For care received in another EEA country, Norway refunds only care you would have had cover for in Norway, at most what it would have cost the public system there; hospital treatment follows separate rules and may need prior approval. Outside the EU: Outside the EEA the refund rules for care in another EEA country do not apply: planned treatment there is normally at your own cost.

Talk to your doctor or dentist in Norway before you go, keep every invoice and record, and check your travel insurance for complications. If the care is something folketrygden covers and you had it in the EEA, apply to HELFO within the time limit.

🇸🇪 If you live in Sweden

For planned dental care in the EU or EEA, Försäkringskassan can refund what you would have received for necessary dental care in Sweden, afterwards; cosmetic dental work is not refunded, and you can ask for an advance decision (förhandsbesked) on the amount. For other planned care you can apply in advance; you pay travel and lodging yourself (1177). Outside the EU: Outside the EU and EEA the cross-border refund rules do not apply: planned treatment there is normally at your own cost.

Agree with your region or health centre (vårdcentral) how the follow-up works once you are home, keep every record, and check your travel insurance for complications.

🇧🇪 If you live in Belgium

For planned care in another EU or EEA country you are refunded at most what the Belgian insurance would pay, and only for care it covers in Belgium; care with a night in hospital or very specialised care usually needs your mutualité's prior authorisation (INAMI; EU). Travel and accommodation are yours to pay (EU). Outside the EU: Outside the EU and EEA, the EU rules on refunds for planned care do not apply: planned treatment there is normally at your own cost (EU).

Talk to your doctor or dentist in Belgium before you go, ask your mutualité in writing what it would refund, keep every invoice and record, and check your travel insurance for complications.

🇳🇱 If you live in the Netherlands

Your basic insurance refunds care abroad only if the same care is insured in the Netherlands, up to the usual Dutch rate; ask your insurer beforehand, as it can set conditions such as a referral (Zorginstituut Nederland). For adults the basic insurance covers surgical dental care, X-rays and removable dentures; implants only in special cases (Rijksoverheid).

Talk to your GP (huisarts) or dentist before you go, ask your insurer in writing what it would refund, keep every invoice and record, and check your travel insurance for complications.

🇸🇬 If you live in Singapore

MediShield Life is designed for subsidised bills at public hospitals in Singapore and does not cover treatment overseas; MediSave can be used for elective hospitalisation and day surgery abroad only at accredited hospitals (Ministry of Health, 2024). For Malaysia: Crossing to Johor by road: plan who drives you back after any sedation or anaesthetic, and where you are seen if a problem starts once you are home.

Ask your Integrated Shield Plan insurer in writing what it covers abroad, agree the follow-up with a doctor in Singapore before you go, keep every record, and get insurance that covers complications.

🇦🇪 If you live in the United Arab Emirates

What your UAE health insurance pays for planned treatment abroad depends on your plan: ask your insurer in writing before you book, and get insurance that covers complications and transport home.

Agree with a doctor or dentist in the UAE who will see you once you are back, keep every record and invoice, and check what your insurer pays for treating a complication of care done abroad.

🇩🇰 If you live in Denmark

For care bought in another EU or EEA country you can get the subsidy you would have had in Denmark, never more than you paid; planned hospital treatment with at least one night in hospital needs your region's prior approval (Styrelsen for Patientsikkerhed). You pay first and claim afterwards. Outside the EU: Outside the EU and EEA the subsidy rules for care bought abroad do not apply: planned treatment there is normally at your own cost.

Talk to your doctor or dentist in Denmark before you go, ask your region's patient office what it would pay, keep every invoice and record, and check your travel insurance for complications.

🇦🇹 If you live in Austria

For planned care in another EU or EEA country you are refunded only for care you are entitled to under Austrian law: outpatient care at 80% of the Austrian contract tariff (the Wahlarzt rule), never more than you paid; hospital treatment needs your insurer's approval first (oesterreich.gv.at). Outside the EU: Outside the EU and EEA the EU rules on refunds for planned care do not apply: planned treatment there is normally at your own cost.

Talk to your doctor or dentist in Austria before you go, ask your health insurer in writing what it would refund, keep every invoice and record, and check your travel insurance for complications.

🇫🇮 If you live in Finland

Kela can refund treatment in another EU or EEA country if it is medically necessary and part of the services of the Finnish public system, at most what it would have cost in your wellbeing services county; you pay first, claim within 6 months of paying, and can ask Kela well in advance how much it would refund (Kela). Outside the EU: Outside the EU and EEA, Kela's rules for treatment in another EU or EEA country do not apply: planned treatment there is normally at your own cost.

Talk to your doctor or dentist in Finland before you go, ask Kela for advance information, keep every invoice and record, and check your travel insurance for complications.

🇨🇭 If you live in Switzerland

Basic insurance covers treatment in Switzerland and emergencies abroad, not planned treatment abroad: the exception is a treatment not available in Switzerland, when your doctor applies to the insurer's medical adviser first (FOPH). Supplementary insurance may cover more: ask it in writing. Switzerland is outside the EU: the EU cross-border refund rules do not apply to Swiss residents, wherever the clinic is.

Agree the follow-up with a doctor or dentist in Switzerland before you go, ask your insurer in writing what it covers, keep every record, and get insurance that covers complications.

Sources

NHS: Weight loss surgery, why it's done nhs.uk · checked 25 Oct 2026
NHS: Weight loss surgery, recovering nhs.uk · checked 7 Nov 2026
NHS: Weight loss surgery, complications nhs.uk · checked 25 Oct 2026
NHS: What is weight loss surgery nhs.uk · checked 25 Oct 2026
BAAPS and BOMSS joint statement on surgical tourism (20 April 2023) baaps.org.uk · checked 25 Oct 2026
CDC Yellow Book: Medical tourism cdc.gov · checked 7 Nov 2026
NHS: General anaesthetic nhs.uk · checked 25 Oct 2026
Anaesthesia (2025): peri-operative management of GLP-1 receptor agonists, consensus statement (Centre for Perioperative Care and others) pmc.ncbi.nlm.nih.gov · checked 25 Oct 2026
ASMBS and IFSO: indications for metabolic and bariatric surgery (2022) asmbs.org · checked 25 Oct 2026
University Hospitals Birmingham NHS: a guide to travelling with sleep apnoea uhb.nhs.uk · checked 25 Oct 2026
NHS: Deep vein thrombosis (DVT) nhs.uk · checked 25 Oct 2026
Chelsea and Westminster Hospital NHS: Pregnancy after bariatric surgery chelwest.nhs.uk · checked 7 Nov 2026
NHS: How and when to take clopidogrel nhs.uk · checked 26 Oct 2026
NHS: Von Willebrand disease nhs.uk · checked 27 Oct 2026

Next review due 25 Apr 2027. Found something wrong or out of date? Tell us via the contact address.