Weight, cholesterol and insurance underwriting

UK CVD burden that is modifiable

Around 70%[6]

UK adults with high blood pressure

An estimated 30%[6]

Usually asked on

Almost every application

Reviewable

Often, with evidence

What the cover actually does

People usually arrive at weight and cholesterol in underwriting with one of four products in mind, and they do genuinely different jobs. Private medical insurance pays for the diagnosis and treatment of new, acute conditionsAcute conditionA condition that starts suddenly and is expected to respond to treatment and resolve. privately, within a defined hospital list and subject to an excessExcessThe amount you pay towards a claim before the insurer pays anything.. Critical illness cover pays a single lump sum when a diagnosis meets a written definition in the contract. Income protection replaces part of your monthly income while you cannot work. Life insurance pays other people after you die. None of them is a general-purpose promise about a condition: each pays in specific, written circumstances, and the circumstances are set out in the policy wordingPolicy wordingThe full contract document that decides what is and is not covered. the insurer must give you before you buy. [2]Financial Conduct AuthorityAccessed 15 September 2026

That distinction matters most where a condition is long-term. Medical insurance is designed around problems that start after cover begins and respond to a course of treatment; the ongoing management of a chronic conditionChronic conditionA long-term condition needing ongoing management rather than a course of treatment that ends. generally sits outside it, however serious the condition is. A protection policy has no such boundary once it is in force: if the definition is met, it pays, and it goes on paying regardless of how long the condition lasts. The practical implication for anyone thinking about weight and cholesterol in underwriting is that the right question is never "does insurance cover this?" but "which of these four contracts pays, in what circumstances, and what did my own application produce?"

How insurers underwrite this history

On life and critical illness cover, height and weight are asked on virtually every application and are used together with the rest of the picture; outcomes range from no change to a loading, and at the far end a postponement. Cholesterol is often only asked about where it has been tested, which means a recent test that shows a good result can help, while a test you have not disclosed can cause difficulty later if it appears in a GP report. Income protection considers the same factors through the lens of ability to work. Private medical insurance does not usually underwrite on weight at all for a standard consumer policy, though weight-management treatment and bariatric surgery are commonly excluded outright. Critically, all of this is insurer-specific: thresholds differ, and none of them is published in a consolidated accessible form, so we quote no bands.

Two mechanics are worth understanding before you apply anywhere. On private medical insurance, moratorium underwritingMoratorium underwritingUnderwriting that automatically excludes recent medical history for a set period, usually five years. asks no medical questions at the start and instead sets aside anything you have had symptoms of, advice about or treatment for in a defined recent period — typically clearing after a continuous symptom-free spell — while full medical underwritingFull medical underwritingUnderwriting where you declare your medical history and the insurer decides cover up front. asks the questions upfront and gives you the exclusions in writing before you commit. Switching insurer may allow continued personal medical exclusionsContinued personal medical exclusionsSwitching insurer while carrying your existing exclusions across, rather than being underwritten afresh., which carries your existing terms across rather than restarting them. On life, critical illness and income protection the assessment happens once: the underwriter may ask for a GP report, and the outcome is written into the policy. Once accepted, later changes in your health do not alter the terms, which is precisely why the application is worth taking seriously.

Why insurers ask, and how combinations work

Underwriting is an exercise in prediction on limited information, so insurers lean on measures that are cheap to collect and correlate with claims experience over decades. Height and weight, and recorded cholesterol where it exists, are two of those measures. What surprises people is how the arithmetic works: these factors are rarely decisive on their own, but they compound. The British Heart Foundation reports that around 70 per cent of the UK’s cardiovascular burden is associated with modifiable risk factors, and that around 30 per cent of UK adults have high blood pressure. An underwriter looking at raised weight alone may make no change; looking at raised weight together with raised blood pressure, raised cholesterol and smoking, the same underwriter is pricing a very different risk. The corollary is encouraging: because these factors are among the few that can change, improvement that is recorded in your notes is one of the few routes to better terms, and most insurers will reconsider a loading on request once there is documented evidence.

If a loading was applied for a measurable factor, ask the insurer in writing what evidence it would need to review the decision, and put a date in the diary to revisit it. Whatever the specifics, the discipline is the same: get the terms in writing before you buy, keep the documents where you can find them, and re-read the exclusions before you book anything privately or open a claim.

Your disclosure rights

The Consumer Insurance (Disclosure and Representations) Act 2012 replaced the old duty to volunteer everything with a duty to take reasonable care not to misrepresent when you answer the insurer’s questions. The same Act sets out what an insurer can do if an answer was wrong. If the mistake was careless, the insurer must respond in proportion: where it would have offered cover on different terms it applies those terms, and where it would have charged more it can reduce the claim by the same proportion. Only a deliberate or reckless misrepresentation allows it to cancel the policy and refuse the claim. [5]UK Parliament (legislation.gov.uk)Enacted 8 March 2012

Alongside the statutes, the FCA’s conduct rules require insurers to handle claims promptly and fairly and not to reject them unreasonably, and to give you the product information and insurance product information documentInsurance product information documentA short standardised summary of what a policy covers and excludes. before you buy. [2]Financial Conduct AuthorityAccessed 15 September 2026 The Consumer Duty obliges firms to deliver good outcomes for retail customers, including communications you can actually understand. [3]Financial Conduct AuthorityAccessed 15 September 2026 Check that any insurer or broker is authorised on the Financial Services Register before you deal with them. [1]Financial Conduct AuthorityContinuously updated; accessed 15 September 2026

What moves the price

Three groups of factors set what you pay. The first is you: age above all, then smoking status, height and weight, occupation on protection policies, and your medical history. The second is the contract: the sum assured or benefit level, the term, the excessExcessThe amount you pay towards a claim before the insurer pays anything. or deferred periodDeferred periodThe waiting time between stopping work and the first income protection payment., the hospital list on a medical policy, and any optional extras such as outpatient cover. The third is how the condition itself is treated — whether it produces a loading, an exclusion or no change at all. Because underwriting outcomes vary so much between insurers and between individuals, we publish no market-wide figures for loadings.

What is verifiable is the scale of what insurers pay out. Protection insurers reported £7.84 billion of claims in 2025, £5.15 billion of it on individual policies, across 258,000 new claims. [8]Association of British Insurers and GRiD, reported by Cover MagazineAccessed 15 September 2026 That is the counterweight to the price conversation: cover that is never claimed on looks expensive in hindsight, and cover that is claimed on rarely does. The other lever most people underuse is design — a higher excess, a shorter benefit period, a smaller hospital list or a guided consultant option can change a medical insurance premium substantially without changing what happens at claim stage for the things you were actually worried about.

How to compare two quotes

• Fix the cover first: outpatient limit, excess, hospital list and underwriting type.
• Ask for each quote in writing, with its date.
• Put the quotes side by side and mark every difference in cover before you look at price.
• Ask what happens to the price at renewal and after a claim.

1. 1

   Step 1: Write down your history accurately

   Dates, investigations, medication and consultations — from your records, not memory.

2. 2

   Step 2: Decide which product answers your worry

   Treatment access, a lump sum, a monthly income or money for others after death.

3. 3

   Step 3: Apply through an adviser who can approach several insurers

   One formal decline is harder to undo than several informal enquiries.

4. 4

   Step 4: Read the exclusions before you accept

   A written exclusion you understand is better than an assumption you do not.

5. 5

   Step 5: Pre-authorise before any private treatment

   Ask the insurer to confirm cover, hospital and consultant fees in writing first.

6. 6

   Step 6: Review after any change in health or cover

   New diagnoses, new medication and switching insurer all change the picture.

If something goes wrong

If a claim is declined or an application produces terms you think are wrong, complain to the firm in writing and ask two precise questions: which clause the decision rests on, and exactly which evidence failed it. The firm must investigate and issue a final response. If that does not settle it, the Financial Ombudsman Service can decide the complaint free of charge, and it publishes both its annual complaints data and its individual decisions. [4]Financial Ombudsman Service2 July 2025 Keep every document: the application you submitted, the terms you were offered, the pre-authorisation, and the correspondence. Complaints about medical history almost always turn on what was asked and what was answered, which is a paper question, not a memory one. For the wider picture, read who regulates insurance in the UK.

Written by

Dior Teshayev

Health Insurance Editor, PremierPMI

• Health insurance editor
• Insurer product and literature research

Dior works alongside senior advisers to research and refine content about private medical insurance, producing articles, guides and updates that reflect the latest market and product changes. He tracks market trends, reviews insurer literature and prepares plain-English summaries for the advisory team.

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Reviewed by

Emma Leadbetter

Editor and Copywriter, PremierPMI

• 15 years health, finance and consumer journalism
• PhD candidate, University of Chichester

Emma has written across health, finance and consumer-affairs journalism for more than 15 years, and has been part of the PremierPMI team since 2022. She is known for making complex topics easy to understand, and fact-checks every guide against current insurer wording before it goes live. She is completing a PhD at the University of Chichester researching how the NHS has changed since COVID-19.

Read full profile