Weight loss and metabolic
The operation is the short part.
Weight loss surgery, also called bariatric surgery, is a treatment for people who are severely obese. It also asks a great deal of the years afterwards, which is what makes travelling for it a real question rather than an obvious yes.
The operation is the shortest part of having weight loss surgery. The NHS says a gastric bypass usually takes around 2 hours and a sleeve gastrectomy usually takes 1 to 3 hours. What follows is long: vitamin and mineral supplements, blood tests to check your levels, changes to how you eat and drink, and follow-up appointments that the NHS says continue for the rest of your life.
NHS, Weight loss surgery: how it’s done (page last reviewed 5 February 2024) Checked 2026-10-08.
General NHS patient information on the operations as the NHS describes them, not a figure for any hospital abroad. The NHS gives these durations with “usually”.
NHS, Weight loss surgery: recovering (page last reviewed 5 February 2024) Checked 2026-10-08.
General NHS patient information describing NHS follow-up arrangements. It does not say for how long supplements must be taken, or that a dietitian provides the follow-up.
That aftercare is how problems with your vitamin and mineral levels are found and treated, and where you get advice on diet and exercise. It happens where you live, not where you were operated on. So the first question is not what it costs abroad. It is who is going to run those blood tests in three years.
Medically reviewed
Reviewed by Dr Gunjan Patel, MBBS, registered with the Gujarat Medical Council (G-65059). Reviewed for accuracy only. This page is general information, not advice about your own case, and Dr Gunjan Patel does not diagnose, prescribe or treat.
The honest difficulty
This is the specialty where our model fits least comfortably.
We would rather say that plainly than sell you a package that does not match the problem.
Most of what we coordinate is a single operation with a defined recovery, and ninety days of follow-up covers it. Bariatric surgery is not shaped like that. The need for structured support runs for years, and the point at which people most often struggle is well past any window we could honestly promise to cover.
There is a second difficulty, and it is the one patients discover late. Some health services are reluctant to take on the routine monitoring for a patient who had the operation privately or abroad. That is not universal and it is not a rule, but it is common enough that it has to be settled before you fly rather than after.
If you cannot get a clear answer from your own doctor about who will do your regular bloods, our honest advice is to solve that first. It is more important than the price of the surgery.
Settle these before booking anything
- Who prescribes and reviews your supplements, and for how long
- Who orders and interprets the regular blood tests
- Who will see you for follow-up, and whether there is a waiting list
- What happens if you regain weight in year three
- Who manages a complication that appears months later
- Whether psychological support is available if you need it
When it does make sense
The cases where travelling for this works well.
You already have follow-up secured
A patient whose own doctor has agreed in writing to run the monitoring is in a completely different position from one who has not asked. If that is you, most of the objection on this page disappears.
You have been declined at home on threshold grounds
Publicly funded bariatric surgery usually has eligibility criteria, and people who fall just outside them can wait indefinitely for a treatment that would help. In England, meeting the national NICE threshold does not by itself guarantee a referral, because local NHS commissioners can and do add their own rules on top of it.
13 of 38
Integrated Care Systems in England that fund bariatric surgery at all, out of 41 of the country's 42 systems that responded to a 2025 freedom of information exercise, were found to apply eligibility criteria stricter than NICE recommends, among them BMI floors as high as 50 or 60, a demand for five years of documented obesity, or proof of weight already lost before a referral is accepted. A large area of England centred on the east of the country had no bariatric surgical unit at all
Elhariry, Iyer et al., Clinical Obesity, 19 January 2025 Checked 2026-09-07.
Based on how each Integrated Care System described its own policy in response to a freedom of information request, not an independent audit of every rejection. Peer reviewed, with the University of Birmingham authors' full criteria list published alongside the paper.
This is a legitimate reason to look further afield, and it is worth an independent view on whether surgery is the right answer for you at all. More on the NHS threshold.
Revision after a previous bariatric operation
Revisional bariatric surgery is markedly more complex than a first procedure and is done well by a smaller number of surgeons. This is the part of the specialty where reaching a high volume team can change the result.
Type 2 diabetes is the main target
Metabolic surgery is increasingly considered for diabetes rather than for weight alone, and the assessment differs. If that is the reason it has been suggested to you, an opinion from someone treating it as a metabolic decision rather than a weight decision is worth having.
Questions
What people ask about weight loss surgery abroad.
Will my doctor at home look after me afterwards?
Often yes, and it is far more likely if you ask them before you go rather than after. Bring the proposed operation and the name of the unit, and ask specifically about supplements, regular blood tests and follow-up appointments. Get the answer in writing. This is the single most useful thing you can do.
Which operation is better, sleeve or bypass?
They suit different people, and the choice depends on your weight, your other conditions, whether you have reflux, and what you are trying to achieve. A surgeon who offers only one should prompt a second opinion, not because they are wrong but because you deserve to hear the comparison.
Is it safe to fly after this surgery?
It is a question for the surgical team, and the answer depends on your recovery. The NHS lists blood clots as a possible complication of weight loss surgery. Its page does not say when it is safe to fly, so the timing of the flight home is not a detail. We ask the surgical team to answer it for your case before anyone books a flight.
NHS, Weight loss surgery: complications (page last reviewed 5 February 2024) Checked 2026-10-08.
The NHS gives no rate and no comparison with other operations. How soon you can fly after surgery is a question for your surgical team.
What does it cost once everything is counted?
More than the surgical quote, always. Add flights, an extended stay, supplements, and the blood tests. We model the whole thing before you commit, and sometimes the honest conclusion is that a private operation at home costs less once the tail is included.
Would you ever tell me not to have this surgery?
We would tell you when the plan is not ready, which is usually about aftercare rather than about the operation. Whether surgery is right for you at all is a clinical decision, and it belongs with a doctor who has examined you and read your history. Our part is making sure you get that assessment from someone with nothing to sell.
Start with the aftercare question, not the price.
Thirty minutes, free. If nobody at home has agreed to your follow-up yet, that is what we will talk about first.