What BMI qualifies you for Mounjaro privately in the UK?

What the licensed BMI figures actually mean for private treatment

Tirzepatide (sold in the UK as Mounjaro) received its UK weight-management licence on the basis of two adult eligibility routes. The first is a BMI of 30 or above, with no additional condition required. The second is a BMI between 27 and 29.9, provided the person has at least one weight-related health condition. Qualifying conditions include type 2 diabetes, prediabetes, high blood pressure, raised cholesterol, obstructive sleep apnoea and cardiovascular disease, among others.

For some ethnic backgrounds (South Asian, Chinese, other Asian, Middle Eastern, Black African and African-Caribbean) UK clinical guidance recognises that health risks arise at lower BMI values, so the thresholds shift down by 2.5 kg/m². That means a BMI of 27.5 (rather than 30) becomes the standard private threshold, and 24.5 (rather than 27) applies where a weight-related condition is present. If that adjustment might apply to you, it is worth raising at the criteria stage of your consultation rather than assuming the standard number applies.

One thing that often surprises people: meeting the BMI figure does not make a prescription automatic. The prescriber also reviews your current medications, any history of conditions that affect suitability such as pancreatitis or certain thyroid conditions, and whether the treatment is clinically appropriate given your wider health. The number qualifies you to be assessed; the assessment decides the outcome.

How NHS Mounjaro criteria compare to the private route

If you have been looking into NHS access, the thresholds are considerably tighter. NICE's recommendation in TA1026 sets a minimum BMI of 35 alongside at least one weight-related comorbidity for NHS prescribing, compared with the 30 threshold that applies privately. The rollout is also phased: as of June 2025, NHS access requires a BMI of 40 or above plus four or more qualifying conditions; from around June 2026 that expanded to BMI 35–39.9 with four or more conditions. A further phase is planned for around March 2027.

Even within those phases, access depends on local commissioning and participation in a wraparound lifestyle programme, so eligibility on paper does not always mean availability in practice. Our page on how to get Mounjaro privately covers the NHS versus private routes in more detail for anyone weighing up both options.

The private route through a regulated pharmacy follows the licensed SmPC criteria, not NICE's NHS commissioning thresholds. That distinction matters: someone with a BMI of 32 and hypertension qualifies under the private licence but would not currently qualify for NHS Mounjaro. Many people who come to a private service fall into exactly this gap.

What a private prescriber checks beyond BMI

Once your BMI clears the relevant threshold, the consultation turns to a broader clinical picture. Prescribers look at current medications, some interact with GLP-1 medicines, and for tirzepatide specifically, oral contraceptive users may need to add a barrier method for the first four weeks of treatment and after each dose increase, because gut-slowing effects can reduce pill absorption. That is documented in the NHS England guidance on weight-management injections and is a practical point worth knowing early.

Prescribers also screen for contraindications. A personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2, a history of pancreatitis and certain gastrointestinal conditions all require discussion. Mounjaro is not recommended during pregnancy or breastfeeding, and is not licensed for under-18s.

At nume, every consultation is read personally by a GPhC-registered Independent Prescriber, a real clinician reads your answers, not software. Identity is verified by photo ID and live video weight check. Our clinical team page has more on who reviews your case. If approved, treatment is dispatched the same day for orders received by 12pm on a working day, with free next-working-day tracked delivery via DPD.

For a broader overview of the treatment itself, the Mounjaro treatment page covers how tirzepatide works, the dosing schedule and what to expect in the first weeks. And if cost is part of your thinking, our Mounjaro pricing page explains what a single transparent private fee includes, because headline prices vary considerably across the market and do not always include consultation, prescription or aftercare. Worth checking what you are actually getting before comparing numbers.

If you have confirmed your BMI and want to take the next step, buying Mounjaro privately through a GPhC-registered pharmacy is the safe, legal route, not every seller advertising these pens online meets that standard. The MHRA has warned publicly about counterfeit weight-loss pens sold without a prescription, some containing insulin, and the scale of enforcement seizures in 2025 shows the problem is real. If you are also wondering whether your GP can prescribe Mounjaro privately, that is a common question and the answer depends on factors worth understanding before you book an appointment. Verifying any pharmacy on the GPhC register takes about thirty seconds.