If you’re trying to figure out whether you can use Mounjaro (tirzepatide) for weight loss in the UK, you’ll see different BMI numbers online and that’s because there are two layers of “eligibility”:

Licensed eligibility (what the medicine is authorised for in the UK)
NHS eligibility (what NICE recommends and what NHS services can actually provide)

This page gives you a clean decision framework, without mixing it up with side-effect or injection-technique topics. For the full product overview, start with Mounjaro weight loss injection pen.

Table of Contents

Quick eligibility summary (licensed vs NHS)

If you’re asking “Am I eligible in general?”

Under UK authorisation, Mounjaro is approved for weight management in adults with:

BMI ≥ 30 (obesity), or
BMI 27 to <30 (overweight) with at least one weight-related health problem (examples include high blood pressure, high cholesterol, prediabetes, heart problems).

If you’re asking “Can I get it on the NHS for weight loss?”

NICE recommends tirzepatide for managing overweight and obesity in adults only if they have:

BMI ≥ 35 or higher, and
at least 4 health comorbiditoes,
and NICE says to use a lower BMI threshold (usually −2.5 BMI) for certain ethnic groups (South Asian, Chinese, other Asian, Middle Eastern, Black African, African-Caribbean).

If you’re asking “Where do I access it through the NHS?”

NHS England states that from 23 March 2025, you may be prescribed tirzepatide for weight management only if it’s prescribed by a specialist weight management service, where wraparound support is available.

1) Licensed criteria (what the UK authorisation allows)

When clinicians talk about “licensed use,” they mean the medicine is authorised for that purpose and for a defined group of people.

For Mounjaro weight management, the licensing logic is based on:

BMI threshold, and
presence of at least one weight-related comorbidity if BMI is in the overweight band, and
being used as an adjunct to reduced-calorie diet and increased physical activity.

Licensed BMI thresholds (simple)

You’re within the licensed group if you’re an adult with:

BMI ≥ 30, OR
BMI ≥ 27 to <30 AND at least one weight-related comorbidity

Important: Licensed eligibility does not automatically mean the NHS will provide it, because NHS decisions must also consider service capacity and NICE recommendations.

2) NICE criteria for NHS use (TA1026)

NICE guidance is the part that usually explains why people see “BMI 35” mentioned.

NICE recommends tirzepatide for managing overweight and obesity only if:

BMI ≥ 35, AND
at least 1 weight-related comorbidity,
and a lower BMI threshold (usually −2.5 BMI) should be used for certain ethnic groups at higher risk at lower BMI.

Why NICE uses a higher BMI than the licence

The licence (authorisation) defines a broad group the medicine can be used for. NICE guidance defines who it is recommended for in NHS care based on clinical and cost-effectiveness and the NHS service model.

3) NHS access pathway (why specialist services + phased rollout)

Even if you meet NICE criteria, NHS access still depends on how services are delivered.

NHS England’s patient guidance says that from 23 March 2025, tirzepatide for weight management may be prescribed only if prescribed by a specialist weight management service, where multidisciplinary support (dietitians, psychologists, etc.) can be provided.

Why it’s not “open access”

The NHS and parliamentary briefings highlight the scale of expected demand and the need for “wraparound services,” which is a major reason for staged implementation.

4) What counts as a “weight-related condition”?

A lot of people get stuck here: “I’m overweight, but do I have a qualifying health problem?”

Under UK authorisation and NICE context, examples commonly referenced include:

High blood pressure (hypertension)
Abnormal blood fats / high cholesterol (dyslipidaemia)
Prediabetes
Cardiovascular disease / heart problems
Obstructive sleep apnoea

In real assessments, clinics also look at:

current medications,
previous weight-loss attempts,
risk profile,
and ability to engage with dietary/activity support.

5) Table: Licensed vs NICE vs NHS access (fast clarity)

Question you’re asking	The “rule set”	Typical threshold you’ll see	What it means in practice
“Am I eligible in principle?”	Licensed indication	BMI ≥30, or BMI 27–<30 + comorbidity	A prescriber can consider it within licence (after assessment)
“Would I meet NICE criteria for NHS care?”	NICE TA1026	BMI ≥35 + comorbidity; −2.5 BMI for some ethnic groups	Defines who NICE recommends it for in NHS settings
“Can I get it on the NHS right now?”	NHS service pathway	Specialist services + phased access	Depends on local services, commissioning, and rollout capacity

6) Simple eligibility checklist + next steps

Step 1 – Work out your BMI band

BMI ≥ 30 → you’re within the licensed group for weight management.
BMI 27 to <30 → you need at least one weight-related condition to fit the licensed group.
BMI ≥ 35 (+ comorbidity) → you’re within the NICE recommended group for NHS care (with ethnicity adjustment where relevant).

Step 2 – Identify if you have a qualifying condition

If you have one of the common weight-related conditions (e.g., hypertension, dyslipidaemia, sleep apnoea, cardiovascular disease, prediabetes), you’re more likely to meet the “with comorbidity” criteria.

Step 3 – Decide which route applies (NHS vs private)

If your main goal is NHS access.
If you’re considering private, expect a proper assessment because weight-management prescribing is tied to safety and support expectations.

Step 4 – Safety signpost (don’t self-qualify only)

Eligibility is not only BMI. Certain situations and medical histories may mean it’s not appropriate.

FAQs

Is Mounjaro only for people with diabetes?

No. In the UK it’s authorised for weight management in adults meeting the BMI criteria (and comorbidity requirements where relevant), alongside diet and activity changes.

What if my BMI is 28 and I have high blood pressure?

That matches the licensed pattern of BMI 27–<30 plus a weight-related comorbidity, but you still need a clinician assessment to confirm suitability.

Why do some sites say BMI 35?

Because NICE TA1026 recommends it in NHS care only if BMI is at least 35 plus a comorbidity (with a lower BMI threshold for certain ethnic groups).

Can I get Mounjaro on the NHS if I meet NICE criteria?

NHS England guidance says it is prescribed through specialist weight management services, and access is affected by rollout and capacity.