What BMI do you need for Wegovy in the UK?

Does having a BMI of 30 automatically mean you qualify for Wegovy?

This is probably the most common misconception our prescribers come across, and it's worth clearing up gently: meeting the BMI threshold is necessary, but it doesn't make Wegovy automatic. If you'd like a full breakdown of exactly where the thresholds sit and what else is considered, our page on Wegovy BMI requirements covers the licensed eligibility for semaglutide 2.4mg (Wegovy), including adults with a BMI at or above 30, or adults at 27–29.9 who have at least one weight-related comorbidity. Those conditions include hypertension, type 2 diabetes, prediabetes, dyslipidaemia, and obstructive sleep apnoea, among others.

A prescriber still needs to assess your full history: other medicines you take, any contraindications such as a personal or family history of certain thyroid conditions, and whether Wegovy is appropriate for your situation right now. Pregnancy, breastfeeding, and trying to conceive are circumstances where the medicine is not recommended, regardless of BMI. Neither is it licensed for under-18s. The BMI figure opens the door to a clinical conversation; it doesn't walk you through it.

You can check your current BMI using the NHS BMI calculator, which gives you a starting point before any consultation.

What BMI is required for Wegovy on the NHS, and does that differ?

Yes, the NHS route follows a narrower set of criteria, set out in NICE technology appraisal TA875. Under that guidance, Wegovy is recommended only within a specialist weight management service (not through a standard GP appointment alone) for adults with a BMI of 35 or above and at least one weight-related comorbidity. The appraisal also caps treatment at a maximum of two years, and NICE recommends reviewing whether to continue if less than 5% weight loss is achieved after six months on the maintenance dose.

For people from South Asian, Chinese, Middle Eastern, Black African, or African-Caribbean backgrounds, NHS England applies thresholds that are 2.5 kg/m² lower throughout, so 32.5 instead of 35, and 27.5–32.4 instead of 30–34.9 for the lower band with comorbidities. These adjustments reflect evidence that cardiometabolic risk accumulates at lower BMI values in those populations.

NHS waiting lists for specialist weight management services are often long. Private treatment through a regulated online pharmacy is available for people who fall outside NHS criteria or prefer not to wait, provided they meet the licensed eligibility thresholds. Our guide to accessing Wegovy in the UK covers both routes in detail.

What counts as a weight-related condition for the 27–29.9 BMI threshold?

If your BMI sits between 27 and 29.9, you still qualify for Wegovy under the licensed indication, but only if a prescriber confirms that you have at least one relevant weight-related health condition. The conditions that typically apply include high blood pressure, type 2 diabetes, prediabetes, raised cholesterol or triglycerides, obstructive sleep apnoea, and in some cases osteoarthritis or non-alcoholic fatty liver disease.

The condition needs to be established, not self-reported. During a clinical assessment, a prescriber will ask about your medical history and may request evidence such as GP records or recent test results. This is one reason a same-day prescription from any legitimate service depends on the quality of information you provide: the full requirements for Wegovy go beyond the BMI figure. At nume, a GPhC-registered Independent Prescriber reads your consultation personally (a real clinician, not an automated filter) and that review happens the same day.

If you want to understand how semaglutide's eligibility criteria compare with other weight-loss medicines, our overview of semaglutide BMI requirements sets out the distinctions clearly. And for a broader look at your options, the weight-loss treatment overview is a useful place to start.

Does BMI mean the same thing for everyone, and are there any caveats?

BMI is a population-level tool, not a precise measure of individual health. It doesn't distinguish between muscle and fat, doesn't reflect fat distribution, and may underestimate risk for people from certain ethnic backgrounds, which is why UK clinical guidance already adjusts the thresholds downward for those groups. At the same time, a high BMI doesn't automatically mean poor metabolic health; prescribers consider the full picture.

For practical purposes, you need an accurate, recent weight and height measurement before a consultation, and it's also worth knowing that Wegovy has specific storage needs, so our guide to Wegovy temperature requirements is worth reading before your medicine arrives. At nume, weight is verified on a brief video call, one of several safety steps that include photo ID verification. It protects you and ensures clinical decisions are based on real data, not estimates. Questions about what else goes into the assessment are answered on our FAQs page, and our clinical team are the people making those calls. If you're ready to find out whether you meet the criteria, start your free consultation and a prescriber will review your details the same day.