Weight-loss surgery on the NHS – and what changes if you go to Türkiye instead

Many people in the UK first ask their GP about weight-loss surgery, then hear about long waits – and start looking at Türkiye. This guide answers the questions UK patients ask most often: what the NHS offers, who qualifies, and what really changes if you pay for surgery abroad instead. It is general information, not individual medical or legal advice; your own situation may be different.

Can I get weight-loss surgery on the NHS?

Yes, the NHS can fund weight-loss surgery such as a gastric sleeve or gastric bypass – but only if you meet set criteria and go through a specialist assessment first.

According to the NHS, surgery is usually considered if:

• your BMI is 40 or more, or
• your BMI is between 35 and 40 and you have a condition that might improve if you lost weight, such as type 2 diabetes, high blood pressure, arthritis or breathing problems, and
• you agree to make healthy lifestyle changes and attend regular check-ups after surgery.

People with certain South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean family backgrounds may be considered at a lower BMI, because health risks rise at a lower weight in these groups. NICE guidance updated in 2023 describes this as a threshold lowered by 2.5 BMI points.

The NHS also says plainly that availability depends on where in the UK you live.

Who decides, and how does the NHS route work?

Your GP is the first step; the decision is then made by a specialist team, not by your GP alone.

In practice the route usually looks like this:

1. GP appointment: your GP checks your BMI and health conditions and discusses options, including non-surgical treatment.
2. Specialist weight management service: often called a “tier 3” service. A team of doctors, dietitians and psychologists assesses you and prepares you for surgery.
3. Bariatric surgery service: sometimes called “tier 4”. The surgical team decides whether an operation is right for you and which one.
4. Long-term follow-up: check-ups, blood tests and dietary support after surgery, with NICE guidance pointing to lifelong annual reviews.

The 2023 NICE update removed the expectation that you must already have been managed in a tier 3 service before referral for assessment. Local rules still differ, so ask your GP how it works in your area.

How long is the wait for weight-loss surgery on the NHS?

There is no single national waiting time – it depends heavily on your area and on how many steps you need to go through.

Waits can build up at more than one stage: getting into a specialist weight management service, completing the assessment programme, and then waiting for the operation itself. The most reliable way to find out is to ask your GP or the local weight management service for the current estimate, in writing if possible.

Tip: Even if you are leaning towards Türkiye, ask for a referral anyway. It costs you nothing, you get a proper assessment, and you keep the NHS option open.

Why do so many people go to Türkiye instead?

Most UK patients who choose Türkiye say the main reasons are time and control: they do not want to wait, or they do not meet the NHS criteria in their area.

Common reasons people give:

• No long wait: surgery can usually be booked without going through a multi-stage NHS pathway.
• Not eligible on the NHS: for example a BMI just below the threshold, or no qualifying health condition.
• Cost compared with UK private care: some people find self-funding in Türkiye more affordable than paying privately in the UK.
• Experience: many clinics in Türkiye carry out bariatric surgery regularly for international patients.

The trade-off is that you take on more responsibility yourself – for choosing a clinic, for travel, and above all for aftercare once you are home. Weight-loss surgery is a major operation with lifelong consequences for how you eat and absorb nutrients, and the decision should be about more than speed and price.

Will the NHS pay for, or refund, surgery I have in Türkiye?

No – if you choose planned surgery privately abroad, you pay for it yourself and the NHS does not refund it.

This applies even if you would have qualified for surgery on the NHS. Budget for the whole journey, not just the operation: flights, accommodation, a companion, possible extra nights, supplements and private follow-up if needed.

Will the NHS treat me if something goes wrong after surgery abroad?

Yes, in an emergency the NHS will treat you, wherever the operation took place.

After a gastric sleeve or bypass, call 999 or go to A&E if you have severe or worsening tummy pain, a fast heartbeat, high temperature, vomiting blood, chest pain, breathlessness, or a painful, swollen leg. These can be signs of a leak, bleeding or a blood clot. For less urgent worries, call NHS 111 or your GP – and contact your clinic in Türkiye as well.

What is less certain is non-urgent, planned care. If you need a revision operation or treatment for a problem that is not an emergency, that is not automatically provided, and options may include returning to the clinic or paying privately. Our guide to complications after surgery abroad explains this in more detail.

Will my GP do my follow-up and vitamin blood tests?

Often your GP will help, but it is not guaranteed – and you should not assume it.

After weight-loss surgery you normally need lifelong vitamin and mineral supplements and regular blood tests to check for deficiencies. NICE guidance says that, for the first two years, follow-up is usually with a specialist bariatric team. A GP may not be able to take that role on alone: medical defence organisation Medical Protection advises GPs to work within their competence and to set out any shared responsibilities in writing.

What this means for you:

• Ask your GP before you travel whether they will prescribe supplements and arrange blood tests.
• Ask the clinic exactly which blood tests it recommends, how often, and who reviews the results.
• Find out how the clinic’s dietitian and surgeon will follow you up remotely, and for how long.
• If your GP cannot do the monitoring, plan for private blood tests and dietitian support.

Should I tell my GP before I go?

Yes – you do not need permission, but telling your GP is one of the most useful things you can do.

Your GP knows your medical history, your medicines and any conditions such as diabetes or sleep apnoea that affect anaesthesia and recovery. Some medicines need to be changed or stopped around surgery, and diabetes medication often needs adjusting quickly afterwards. Ask the clinic for a pre-operative assessment letter and share it with your GP.

Tip: Ask your GP for a printed summary of your medical history and current prescriptions to take with you to Türkiye.

Do I need special travel or complication insurance?

Usually yes – standard travel insurance generally does not cover planned surgery or its consequences.

Look for a policy designed for medical travel that covers the operation and its complications, and read the exclusions carefully. Separately, ask the clinic what complication insurance it holds: authorised clinics in Türkiye must have complication insurance for surgical procedures in health tourism. Ask what it covers, for how long, and whether it applies once you are back in the UK.

NHS route or Türkiye: a quick comparison

Question	NHS	Self-funded in Türkiye
Who pays?	NHS, if you meet the criteria	You
Eligibility	BMI and health criteria, specialist assessment	Decided by the clinic and surgeon
Waiting time	Varies by area, several stages	Often shorter, but varies
Preparation programme	Built into the pathway	Varies – ask what is included
Follow-up	Specialist team, then long-term reviews	Depends on the clinic plan and your GP
Emergencies in the UK	NHS treats you	NHS treats you
Revision or non-urgent problems	Within the NHS pathway	Not guaranteed on the NHS

What should I sort out before booking?

Before you pay a deposit, work through this checklist:

• Speak to your GP and, ideally, get an NHS referral or assessment.
• Check the surgeon’s qualifications and how many bariatric operations they carry out.
• Confirm the clinic is authorised for health tourism in Türkiye.
• Get a written treatment plan: which operation, why, and the main risks.
• Get a written aftercare plan: dietitian, blood tests, supplements and contact details.
• Ask what happens and who pays if you need further treatment.
• Buy insurance that covers the surgery and complications.
• Read the contract and the deposit and cancellation terms.
• Plan enough time in Türkiye before flying home, as advised by your surgeon.
• Bring home your operation report, discharge summary and medication list.

Read more

• Gastric sleeve in Türkiye: procedure, risks and aftercare
• Gastric bypass or gastric sleeve: which is right for you?
• Your treatment contract with a Turkish clinic