How overweight do you have to be for Wegovy in the UK?

You've checked your BMI and you're not sure if it's enough

Picture this: you've used the NHS BMI calculator and landed somewhere in the high-twenties or low thirties. The number is there on the screen, but you're not sure whether it crosses the line. That uncertainty is exactly what this page is for.

For a private Wegovy prescription in the UK, the licensed starting point is a BMI of 30 or above. If your BMI sits between 27 and 29.9, you may still be eligible, but only if you have at least one weight-related comorbidity. The conditions that count include type 2 diabetes, high blood pressure, raised cholesterol, obstructive sleep apnoea and osteoarthritis, among others. A prescriber will ask about these directly during your consultation.

One thing worth knowing before you run the numbers: BMI is calculated from self-reported or measured height and weight, and it doesn't tell the whole story. Someone with the same BMI as you might have a very different health profile. That's why a prescriber reviews your answers rather than an automated system making a call on a single figure. If you're wondering what BMI you have to be to get Wegovy and how the thresholds are applied in practice, you can find more detail on our dedicated page.

Ethnic background also shifts the goalposts. UK guidance recognises that people from South Asian, Chinese, Middle Eastern, Black African or African-Caribbean backgrounds carry higher cardiovascular and metabolic risk at lower BMI values, so the thresholds are set 2.5 kg/m² lower across the board, meaning 27.5 instead of 30, or 24.5 instead of 27 with a comorbidity.

What the NHS requires, and why it's a different question

The NHS route to Wegovy is governed by NICE technology appraisal TA875, which sets conditions that are substantially stricter than the private licence. Under that guidance, NHS Wegovy is recommended only within a specialist weight management service (not a standard GP appointment) and only for a maximum of two years. The BMI threshold for NHS eligibility sits at 35 or above (with at least one weight-related condition), or 30 to 34.9 if specialist-referral criteria are met.

Those criteria are not a quick box to tick. Specialist services involve multidisciplinary teams, dietary and behavioural support, and waiting lists that in many areas run to months. If you're reading this and wondering how overweight you need to be for Wegovy on the NHS, the honest answer is: possibly, but you'd need a referral, a service with capacity, and a BMI that clears a higher bar than the private route.

Private treatment through a regulated online pharmacy requires no referral and no waiting list. A prescriber reviews your consultation the same day (a named clinician, not a piece of software) and if you're clinically suitable, you can begin treatment quickly. That's a meaningful difference for people who meet the private threshold but not the NHS one, or who simply don't want to wait. If you want to understand how overweight you need to be to use Wegovy across both the private and NHS routes, our dedicated page walks through the criteria in full. If you're also comparing costs, our Wegovy pricing page explains what an all-inclusive private service typically covers.

It's also worth noting that NICE's guidance says treatment should be reviewed if less than five percent of body weight is lost after six months on the maintenance dose. This isn't a disqualifying condition upfront, it's a built-in checkpoint that responsible prescribers apply throughout treatment.

Below the threshold, what if you're only slightly overweight?

A question our prescribers hear regularly: what if my BMI is 26, or 25, and I want to lose a stone? Wegovy is not licensed for people in the healthy or mildly overweight range with no qualifying health condition. The licence exists for people with obesity, or with meaningful overweight alongside a condition that weight contributes to, not for cosmetic or modest weight loss. The MHRA is explicit on this point.

That position isn't arbitrary. These medicines produce real physiological effects and carry real side effects, gastrointestinal symptoms are common, and pancreatitis, whilst infrequent, is a known risk. Prescribing them to people without a clinical need creates risk with no corresponding benefit. A responsible prescriber won't issue a prescription that falls outside the licensed parameters, and a pharmacy operating within GPhC standards won't dispense one. If you're curious how the thresholds look in practice for people close to the line, the page on Wegovy for people who are slightly overweight covers this in more detail.

The short version: if your BMI is under 27, Wegovy isn't the right tool, regardless of how keen you are to lose weight. If it sits between 27 and 29.9, the answer depends entirely on whether a qualifying comorbidity is present and confirmed during clinical review.

The consultation step that turns a number into an answer

Eligibility thresholds give you a starting point, not a decision. The actual decision (whether Wegovy is appropriate for you specifically) sits with a GPhC-registered Independent Prescriber who reads your health information in full. At nume, that review happens the same day you submit your consultation.

The prescriber considers your BMI alongside your medical history, any medicines you already take, and conditions that might affect suitability or require extra monitoring. A few things that a number on a calculator can't flag: whether you've had pancreatitis before, whether you're on an oral contraceptive that might need a backup method during the early weeks of treatment, or whether a condition like thyroid disease needs to be accounted for. These are the kinds of details that make the clinical review the meaningful part of the process, not just a formality.

If you're approved, treatment is dispatched the same day (for orders received before noon, Monday to Friday) and arrives by tracked DPD delivery the next working day, useful to know if you're planning around a holiday or want to start before a busy week. Packaging is plain and unbranded. The prescription, delivery and ongoing clinical aftercare are all included in one transparent price, no subscription, no hidden fees, and the process is reviewed afresh each time you reorder.

Our clinical team oversees prescribing standards across every consultation. If you'd like to understand the full range of treatment options before deciding, the weight-loss treatment overview is a good place to start. When you're ready to find out whether you're eligible, you can check your eligibility with a free consultation, no commitment, no referral needed.