If you’ve been looking up eligibility criteria online, and getting a different answer from every website, you’re not alone. The rules around who qualifies for weight loss injections can feel confusing, but they really don’t have to be.
Key points
Most adults with a BMI of 30+ may be eligible for weight loss injections through a private pharmacy, in combination with a reduced-calorie diet and increased physical activity. If you have a weight-related health condition, the BMI requirement drops to 27.
NHS eligibility is more strict. Wegovy requires a BMI of 35+ with at least one weight-related health condition, accessed through specialist weight management services. Mounjaro currently requires a BMI of 40+ with at least four of five specified weight-related health conditions.
With the NHS, people from South Asian, Chinese, other Asian, Middle Eastern, Black African and Afro-Caribbean backgrounds qualify at a BMI of 2.5 points lower, following NICE guidance.
Access to Mounjaro on the NHS is expanding in phases through to April 2027, so people who don’t meet the current criteria may become eligible as the criteria widen.
Before any weight loss medicine can be prescribed, a prescriber will need to perform a two-way consultation to verify your details, including your weight and BMI. This is a regulatory requirement for all weight management medicines in the UK.
Table of contents
What BMI do I need to qualify for weight loss injections?
Why are the BMI requirements lower for people from ethnic minority backgrounds?
What is the difference between NHS and private eligibility?
When will the NHS criteria expand?
Do I need to have other weight-related health conditions to qualify?
Could I still qualify if my BMI is borderline?
What happens during a weight loss consultation?
How do I find out if I qualify?
Frequently asked questions about weight loss injection eligibility
What BMI do I need to qualify for weight loss injections?
Adults with a BMI of 30+ may be eligible for weight loss injections privately, whereas criteria for treatment on the NHS are more strict and vary depending on the medication.
The BMI you need depends on whether you’re going through the NHS or a private pharmacy. Privately, the requirements are lower than most people expect. In fact, you may be eligible with a BMI of 30+, in combination with a reduced-calorie diet and increased physical activity, even if you don’t have any other weight-related health conditions. If you have at least one weight-related health condition, such as high blood pressure or type 2 diabetes, the BMI requirement drops to 27+.
To put those numbers in perspective, a BMI of 30 for someone who is 5 foot 5 inches tall (1.65m) is roughly 12 stone 12 pounds (81.6kg).
Criteria for getting weight loss injections on the NHS are more strict. For Wegovy (Semaglutide), you need a BMI of 35+ with at least one weight-related health condition, accessed through a specialist weight management service. For Mounjaro (Tirzepatide)
Cohort 1 (launched June 2025), the bar is higher still: a BMI of 40+ with at least four out of five specified conditions (1). NICE estimates that at least 220,000 people in England will be eligible for Mounjaro across the first three years of the phased NHS rollout (2).
Why are the BMI requirements lower for people from ethnic minority backgrounds who are being treated by the NHS?
For treatment with the NHS, NICE recommends a 2.5 points lower BMI requirement for people from South Asian, Chinese, other Asian, Middle Eastern, Black African and African-Caribbean backgrounds due to higher cardiometabolic risk at lower weights.
People from certain ethnic backgrounds may develop conditions like type 2 diabetes and cardiovascular disease at a lower BMI than White populations. NICE Technology Appraisal TA1026 (December 2024) recommends Tirzepatide for adults with a BMI of 35+ and at least one weight-related health condition, with a lower requirement of 32.5 for people from South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean backgrounds (1). This isn't about creating double standards, but rather about ensuring equal access based on all the clinical evidence available.
Under NHS guidelines, you’d need a BMI of 32.5+ for Wegovy, or a BMI of 37.5+ for Mounjaro (Cohort 1). If you’re from one of these backgrounds and thought you didn’t meet the criteria, it’s worth checking again with the adjusted figures.
What is the difference between NHS and private eligibility?
NHS eligibility criteria require a BMI of 35–40+ with multiple weight-related health conditions that need to be accessed through specialist weight management services, whereas privately you may be eligible starting at a BMI of 30 or even 27 if you have at least one weight-related health condition.
This can be one of the biggest sources of confusion. The NHS and private pathways have different criteria, different costs and possibly different waiting times. Here’s how they compare:
If you do not meet the current requirements for the NHS, private pharmacy services apply wider licensed criteria and do not require a GP referral. A free online consultation can confirm whether you meet the eligibility criteria or not.
On the NHS | Privately | |
|---|---|---|
BMI to be prescribed Mounjaro | 40+ with four out of five weight-related health conditions (Cohort 1) | 30+ (or 27+ with one weight-related health condition) |
BMI to be prescribed Wegovy | 35+ with at least one weight-related health condition (within specialist weight management service, maximum of 2 years) | 30+ (or 27+ with one weight-related health condition) |
Cost | NHS-funded (free for patient) | Paid by the patient. See current Mounjaro or Wegovy pricing |
Availability | Limited – phased roll-out starting from June 2025 | Available following a consultation to verify details, weight, BMI and other medical conditions, in line with GPHC guidance |
Referral needed? | Yes, through a GP or specialist service | No referral required |
When will the NHS criteria expand for Mounjaro?
Access to Mounjaro on the NHS is being rolled out in different phases. Cohort 1 (in June 2025) allowed access for people with a BMI of 40+ who also have four weight-related health conditions, Cohort 2 (June 2026) will lower the BMI requirement to 35+, and Cohort 3 (April 2027) will reduce the number of weight-related health conditions required to three.
NHS England is allowing access to Mounjaro through a phased roll-out (2). The timeline for the roll-out is:
Cohort 1 (June 2025): BMI 40+ with at least four out of five weight-related health conditions
Cohort 2 (June 2026): BMI 35–39.9 with at least four out of five weight-related health conditions
Cohort 3 (April 2027): BMI 40+ with at least three out of five weight-related health conditions
The five qualifying weight-related health conditions are type 2 diabetes, hypertension (high blood pressure), dyslipidaemia (abnormal fat levels in the blood), cardiovascular disease (heart and blood vessel disease) and obstructive sleep apnoea (when your breathing stops and starts while you sleep) (2). If you don’t meet the current or future criteria, they may widen as supply and resources grow. For a more detailed breakdown of the NHS pathway, see our guide on whether you can get Mounjaro on the NHS.
Do I need to have other weight-related health conditions to qualify?
To get Mounjaro on the NHS, you need at least four out of five specified weight-related health conditions, while Wegovy requires one. However, privately, you may be eligible with just one weight-related health condition at a BMI of 27+ or with no weight-related health conditions at a BMI of 30+.
The short answer depends on your pathway. If you’re going private and your BMI is 30+, you don’t need to have any additional weight-related health conditions at all. At a BMI of 27+, you’ll need at least one weight-related health condition to be considered eligible.
On the NHS, weight-related health conditions matter a lot more. In the first phase of the roll-out for Mounjaro, the NHS requires you to have at least four out of five specified weight-related health conditions: type 2 diabetes, hypertension, dyslipidaemia, cardiovascular disease and obstructive sleep apnoea (2). Wegovy requires at least one weight-related health condition alongside a BMI of 35+.
One thing that people often don’t realise is that conditions like pre-diabetes, high cholesterol and sleep apnoea often go undiagnosed. According to the Health Survey for England 2024, roughly 2 in 3 adults in England were overweight or living with obesity, and nearly 1 in 3 were living with obesity (BMI 30+) (3). Many of these people have weight-related health conditions that they haven’t been tested for. If you haven’t had your blood pressure, blood sugar or cholesterol checked recently, a routine GP check-up could reveal a condition you didn’t know about that may qualify you for weight loss injections. In this case, your prescriber will need to verify and treat this condition and then decide whether you qualify for injections.
Could I still qualify if my BMI is borderline?
If you have a borderline BMI, it can cause uncertainty and frustration about whether you’re actually eligible or not. These examples show how the criteria would be applied in real-world practice:
You have a BMI of 28 and have high blood pressure: You may be eligible privately for Mounjaro and Wegovy because you meet the BMI requirement of 27+ with one weight-related health condition. You would not meet the current NHS criteria for Mounjaro or Wegovy, where the criteria are more strict.
You have a BMI of 32, and are from a South Asian background: With the ethnicity adjustment of 2.5 points, the threshold to get Wegovy on the NHS drops from 35 to 32.5. At a BMI of 32, you’re just below the adjusted NHS requirement. If your BMI reaches 32.5, you would be considered for Wegovy on the NHS too. However, you still wouldn’t be eligible for Mounjaro on the NHS, as you would need a BMI of 37.5 to qualify.
You have a BMI of 35 but have no weight-related health conditions: You don’t meet the NHS criteria (weight-related health conditions are required for both Mounjaro and Wegovy). Although privately, you may be eligible for both, as you have a BMI of 30+ with no weight-related health conditions needed.
If you’re unsure where you stand, a two-way consultation between you and your prescriber can give you a clearer overall picture. A prescriber will look at your full medical history, weight, BMI and other medical history, not just a single calculation or checklist.
What happens during a weight loss consultation?
An online weight loss consultation for a private prescription involves checking your BMI, reviewing your medical history, assessing any weight-related health conditions and a prescriber making a final decision. The whole process typically takes less than 10 minutes from start to finish.
Many people are put off checking their eligibility because they’re unsure about the whole process. Here’s what a typical online weight loss consultation looks like:
Step 1: BMI check. You provide your height and weight so your BMI can be calculated.
Step 2: Medical history. You’ll answer some questions about any medications you’re currently on, allergies and any previous weight loss attempts. You'll also need to provide pictures of yourself.
Step 3: Weight-related health conditions. The prescriber checks whether you have any weight-related health conditions that may affect eligibility.
Step 4: Medication suitability. Based on your profile, the prescriber may request a telephone or video call to be completed by a pharmacist with you and will then decide if treatment is suitable for you.
Step 5: Prescriber decision. A doctor reviews your case and confirms whether you are eligible or not.
Under General Pharmaceutical Council (GPhC) guidance (February 2025), pharmacies are required to independently verify your height and weight to see if you are eligible for any weight loss medications. This is typically done through a live video consultation, access to your GP records or contact with another healthcare provider. To make sure it’s really you, a photograph alone or pre-recorded video is not accepted for this purpose.
The consultation is confidential and if you’re told that you’re not yet eligible, it isn’t a rejection. It simply means you don’t meet the criteria for a specific medication right now. The prescriber can explain what your options are and suggest next steps. For more details on how weight loss injections work, we have a separate guide covering the clinical information.
How do I find out if I qualify?
The best way to find out if you meet the criteria is to complete a consultation with a registered pharmacy. A prescriber will review your BMI, medical history and eligibility for Mounjaro or Wegovy.
There are three main routes to accessing weight loss medications:
Ask your GP, who can refer you to a specialist weight management service for NHS-funded Mounjaro or Wegovy treatments.
Use an NHS specialist weight management service directly (if available in your area).
Complete an online consultation with a registered pharmacy, such as Oxford Online Pharmacy.
Oxford Online Pharmacy’s consultation is free. If you’re not sure whether you meet the criteria, a consultation can give you a clear answer in minutes.
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Frequently asked questions about weight loss injection eligibility
What BMI do I need for weight loss injections in the UK?
Weight loss injections are prescribed provided that you also follow a reduced-calorie diet and increased physical activity. Privately, you may be eligible with a BMI of 30+, or 27+ with at least one weight-related health condition. NHS criteria are more strict: your BMI must be 35+ for Wegovy with at least one weight-related health condition, or 40+ with four weight-related health conditions for Mounjaro (Cohort 1). If you’re from an ethnic minority background, these criteria are 2.5 points lower in the NHS.
Can you get weight loss injections on the NHS?
Yes. Wegovy is available through specialist weight management services on the NHS for adults with a BMI of 35+ with at least one weight-related health condition. Mounjaro is being rolled out in phases from June 2025, starting with people who have a BMI of 40+ with four weight-related health conditions.
Do I qualify for Mounjaro?
Privately, you may be eligible for Mounjaro with a BMI of 30+ or 27+ with one weight-related health condition. On the NHS, you currently need a BMI of 40+ with at least four out of five specified weight-related health conditions. A free online consultation can confirm whether you’re eligible or not.
What weight-related health conditions count towards eligibility?
The five qualifying weight-related health conditions to be eligible for NHS-funded weight loss injections are: type 2 diabetes, hypertension, dyslipidaemia, cardiovascular disease and obstructive sleep apnoea. Privately, any weight-related health condition may be considered as part of the overall clinical assessment.
Can I get Mounjaro privately if I can’t get it on the NHS?
Private online pharmacies may prescribe Mounjaro to adults with a BMI of 30+, or 27+ with one weight-related health condition, subject to a clinical consultation confirming eligibility. You do not need to meet the more strict NHS criteria.
Are the eligibility criteria different for people from ethnic minority backgrounds with the NHS?
Yes. For treatment with the NHS, NICE recommends a 2.5 points lower BMI requirement for South Asian, Chinese, other Asian, Middle Eastern, Black African and African-Caribbean populations, because these groups have higher cardiometabolic risks at lower body weights.
What happens if I don’t qualify for weight loss injections?
If you don’t meet the current criteria, NHS requirements are expanding in phases through to April 2027. You may also be eligible privately at a lower BMI. A consultation can identify conditions you may not know about.
How much do weight loss injections cost privately?
Private prices vary by provider and depend on which medication you’re prescribed. An online consultation is usually free, and you only pay if a prescriber confirms your eligibility and you choose to proceed. Please see the Mounjaro and Wegovy product pages for the current pricing.
Do I need to have tried dieting first before I can get weight loss injections?
NHS services may require evidence of previous attempts at losing weight. Private pharmacies assess clinical suitability based on BMI, weight-related health conditions and past medical history.
Can my GP prescribe weight loss injections?
GPs can refer you to specialist weight management services for NHS-funded treatments. They cannot currently prescribe Mounjaro or Wegovy directly in primary care. Alternatively, registered online pharmacies may be able to prescribe Mounjaro or Wegovy privately after a clinical assessment.
References
NICE Technology Appraisal TA1026. Tirzepatide for managing overweight and obesity. National Institute for Health and Care Excellence; December 2024.
NHS England. Weight management injections. NHS England; 2025.
NHS Digital. Health Survey for England 2024: Adults overweight and obesity. NHS Digital; 2024.
Jastreboff AM, Aronne LJ, et al. Tirzepatide once weekly for the treatment of obesity (SURMOUNT-1). New England Journal of Medicine; 2022.
Aronne LJ, Sattar N, et al. Tirzepatide versus semaglutide for weight loss (SURMOUNT-5). New England Journal of Medicine; May 2025.
Office for Health Improvement and Disparities. Obesity Profile: short statistical commentary, May 2025. GOV.UK; May 2025.