Conditions and cover

Diabetes and insurance cover: type 1, type 2 and underwriting

The short answer

Diabetes is insurable but almost always underwritten individually. Insurers look at the type, how long since diagnosis, how well controlled it is, what treatment is needed and whether complications exist. Private medical insurance normally excludes its ongoing management, while life and income protection cover is often available with a loading.

Written by Tumaris Rahimova. Reviewed by Stuart Hendy.

Published 2026-09-15. Last reviewed 2026-09-15. Next review due 2026-12-15.

Living with diabetes, UK: Almost 6 million ^[9]
Diagnoses that are type 2: Around 90% ^[9]
Estimated NHS cost of diabetes: £10.7 billion ^[9]
Clinical information: NHS ^[13]

What to know about diabetes and cover

A condition name never decides an outcome on its own — the written terms do. Read more
Underwriting happens once on protection products, and continuously on medical insurance claims. Read more
Answer every application question carefully: the law asks for reasonable care, not perfect memory. Read more
Existing conditions are normally outside a new medical insurance policy, not inside it at extra cost. Read more
If a decision looks wrong, there is a free complaints route that ends with the Ombudsman. Read more

What the cover actually does

People usually arrive at diabetes 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 conditions privately, within a defined hospital list and subject to an excess. 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 wording the insurer must give you before you buy. ^[3]

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 condition 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 diabetes 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

Life insurance with diabetes is widely available, usually with a loading whose size depends on type, duration, control and complications. Critical illness cover is often available too, though some insurers apply exclusions for conditions they regard as diabetes-related, and terms for type 1 are generally firmer than for type 2. Income protection assessment turns on control, complications and occupation; an exclusion for diabetes-related incapacity is one common outcome. Private medical insurance treats diabetes as a chronic condition: routine monitoring, medication and long-term management sit outside the policy under almost every wording, although the investigation of a new, unrelated acute problem is unaffected. Gestational diabetes is usually handled separately and may be treated as resolved after pregnancy, subject to the insurer’s own questions. Because insurer thresholds are not published in any accessible consolidated form, we quote no loadings [STATISTIC REQUIRED: current diabetes underwriting thresholds and loadings by type and product, named insurer sources and dates].

Two mechanics are worth understanding before you apply anywhere. On private medical insurance, moratorium underwriting 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 underwriting asks the questions upfront and gives you the exclusions in writing before you commit. Switching insurer may allow continued personal medical exclusions, 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.

Thinking about diabetes and cover

What works well

Life cover is widely available, usually with a loading.
Good recorded control and no complications improve terms.
Unrelated acute conditions remain claimable on a medical policy.

What to watch

Recorded complications change the assessment substantially.
Ongoing management sits outside private medical insurance.
Type 1 terms are generally firmer than type 2.

What an underwriter is actually measuring

Almost 6 million people in the UK are living with diabetes according to Diabetes UK — over 4.7 million with a diagnosis and an estimated 1.3 million more who have type 2 but have not yet been diagnosed. Around 90 per cent of diagnoses are type 2 and around 8 per cent type 1. For insurance purposes the type matters, but so does everything around it. Underwriters assess how long you have had the condition, what your recent control has looked like as recorded in your notes, what treatment is required, whether your weight and blood pressure are recorded as stable, whether you smoke, and above all whether any complications have been recorded. Complications are the biggest single driver: diabetes without them is a manageable underwriting question, while recorded eye, kidney, nerve or cardiovascular complications change the assessment substantially. Diabetes UK also reports that the total cost of diabetes to the UK NHS is an estimated £10.7 billion, with around 60 per cent of that spent on complications — which is exactly the pattern underwriters are pricing against.

Ask your practice for your recent recorded control measurements and any complication screening results before you apply; precise, recent figures generally produce better terms than vague answers. 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

When you buy cover as a consumer, the Consumer Insurance (Disclosure and Representations) Act 2012 replaced the old duty to volunteer everything with a duty to take reasonable care not to make a misrepresentation in answer to the insurer’s questions. ^[6] The insurer’s remedies depend on what happened: a deliberate or reckless misrepresentation lets it avoid the policy, while a careless one is treated proportionately — the insurer does what it would have done had it known, which might mean an exclusion applied retrospectively or a reduced payment rather than nothing at all. Where the policyholder is a business, the stricter fair-presentation duty in the Insurance Act 2015 applies instead. ^[7]

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 document before you buy. ^[3] The Consumer Duty obliges firms to deliver good outcomes for retail customers, including communications you can actually understand. ^[4] Check that any insurer or broker is authorised on the Financial Services Register before you deal with them. ^[2]

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 excess or deferred period, 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 [STATISTIC REQUIRED: current underwriting loadings and acceptance rates by condition, named insurer sources and dates].

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. ^[16] 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.

UK context for heart, circulatory, metabolic and neurological conditions (verified 15 September 2026)
Measure	Figure	Source
People living with cardiovascular disease, UK	Over 8 million	British Heart Foundation, July 2026
Share of all UK deaths caused by cardiovascular disease	Around 26%	British Heart Foundation, July 2026
People living with coronary heart disease, UK	2.3 million	British Heart Foundation, July 2026
Stroke or TIA survivors, UK	At least 1.5 million	British Heart Foundation, July 2026
Adults with high blood pressure, UK	An estimated 30%	British Heart Foundation, July 2026
People living with diabetes, UK	Almost 6 million	Diabetes UK, 2024-25 registrations
People diagnosed with Parkinson’s, UK	Around 166,000	Parkinson’s UK
Underwriting loadings by condition	[STATISTIC REQUIRED]	No accessible market-wide source on 15 September 2026

People living with selected conditions in the UK (millions)
Cardiovascular disease	8million people
Diabetes	6million people
Heart disease	5million people
Coronary heart disease	2.3million people
Stroke/TIA survivors	1.5million people

Source: see [8]

Evidence that helps a diabetes application

Assumptions: this compares the questions to ask and the documents to collect, not prices. No premium, loading or acceptance figure is assumed where none has been published, sourced and dated; the placeholders stand for your own paperwork.

Type and date of diagnosis: [GP RECORD REQUIRED]
Recent recorded control measurements: [GP RECORD REQUIRED]
Complication screening results: [GP RECORD REQUIRED]
Terms offered by each insurer: [WRITTEN OFFERS REQUIRED]

The result is a written record you can compare across insurers — application answers, the exclusions offered, and the insurer’s own confirmation in writing. Where nobody has given you a figure, the honest entry is a placeholder until they do.

Write down your history accurately Dates, investigations, medication and consultations — from your records, not memory.
Decide which product answers your worry Treatment access, a lump sum, a monthly income or money for others after death.
Apply through an adviser who can approach several insurers One formal decline is harder to undo than several informal enquiries.
Read the exclusions before you accept A written exclusion you understand is better than an assumption you do not.
Pre-authorise before any private treatment Ask the insurer to confirm cover, hospital and consultant fees in writing first.
Review after any change in health or cover New diagnoses, new medication and switching insurer all change the picture.

“With diabetes, the worst thing anyone can do is guess. I have seen people assume they would be declined and never apply, and I have seen people assume they were covered and never read the exclusion. Both mistakes are avoidable, and both are expensive. Write the history down exactly as it appears in your records, let an adviser test it with more than one insurer, and then make the decision from the written terms in front of you rather than from what you feared the answer would be.”

Adviser insight — Andrew Buscu, PMI Advisor, PremierPMI, PremierPMI

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. ^[5] 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.

Common questions

Can I get insurance if I have a history of diabetes?: Usually there is some form of cover available, but the terms depend on the product and on your individual history. On private medical insurance, an existing condition is normally outside the cover: moratorium underwriting sets aside anything you have had symptoms of, advice about or treatment for in a defined recent period, while full medical underwriting produces a written exclusion you can read before you buy. On life, critical illness and income protection, the application is assessed once and the outcome can be standard terms, an increased premium, an exclusion, a postponement or a decline. None of that can be predicted from a condition name alone, which is why we do not publish "typical" outcomes here.
Will an insurer charge more because of diabetes?: It may. Underwriters price the risk they are being asked to take, so a history that has a measurable effect on claims experience can produce a loading on a life, critical illness or income protection premium, or an exclusion instead. On private medical insurance the more common outcome is not a higher price but a narrower policy — the condition sits outside the cover rather than inside it at extra cost. Because loadings differ by insurer, by product and by the detail of the individual case, we do not quote figures [STATISTIC REQUIRED: current market underwriting loadings by condition and product, named insurer sources and dates]. The practical route is to apply through an adviser who can approach several insurers, and to compare the written terms rather than the headline rate.
Do I have to tell the insurer about my medical history?: Yes — and the way the law frames it matters. For consumer policies the Consumer Insurance (Disclosure and Representations) Act 2012 requires you to take reasonable care not to make a misrepresentation when you answer the insurer’s questions. ^[6] You are not expected to volunteer your entire life story unasked, but you must answer what is asked honestly and carefully, including the questions that sound minor. Where cover is bought by a business, the Insurance Act 2015 imposes a stricter fair-presentation duty instead. ^[7] If you are unsure whether something counts, disclose it and let the underwriter decide: a declined application is inconvenient, while an unpaid claim years later is far worse.
Is treatment for diabetes covered once a policy is in force?: That depends on the wording, not on the product name. Private medical insurance is built around acute conditions — problems that begin after the policy starts and that treatment is expected to put right — and most policies limit or exclude the ongoing management of a chronic condition. Many long-term conditions therefore sit partly inside and partly outside a policy: investigation of a new symptom may be covered, while routine monitoring is not. Critical illness cover works differently again: it pays a lump sum only where the diagnosis meets the policy definition written in the contract. Read the definitions and the exclusions, and ask the insurer to confirm in writing before booking anything privately.
What happens at claim stage?: The insurer checks three things: that the policy was in force, that what happened meets the written definition, and that the medical evidence supports it. On private medical insurance there is usually a pre-authorisation step before treatment, so the answer is known in advance. On protection products the evidence comes from your GP or consultant records, which is also where an inaccurate application form tends to surface. Across the market, insurers reported paying £7.84 billion in protection claims in 2025. ^[16] Most claims are paid; the ones that are not usually failed a definition or an application question rather than the insurer changing its mind.
What if I am already waiting for NHS treatment?: Buying a policy while you are waiting does not usually bring that wait inside the cover — anything you already have symptoms of, or are being investigated for, is almost always treated as pre-existing. NHS England publishes the consultant-led referral-to-treatment statistics each month, which is the honest place to look at current waiting times rather than any figure quoted by a seller. ^[15] If you are mid-pathway and considering paying privately, get the private cost in writing first, and understand what happens if you later need to return to NHS care. Our guide to NHS waiting lists covers how the pathway is measured.
Where can I get clinical information about diabetes?: Not here, and that boundary is deliberate. The Health Guide does not provide diagnosis, symptom, treatment or prognosis information, and the people who write and review these guides are insurance advisers rather than clinicians, so it would be wrong for us to offer anything that reads like medical guidance. For clinical information start with the NHS page on type 2 diabetes. ^[13] Discuss anything personal with the healthcare team responsible for your care, because they have your history in front of them and we do not, and use the relevant UK charity for practical day-to-day support, which is often the most useful source of all for living with a condition rather than being treated for one. This guide is limited to one question: what a condition means for cost, cover, underwriting, claims and access to treatment. Everything in it is written on that footing, and nothing in it should be read as a view about your care.
Who can help me decide?: We provide information only. We do not give advice and we do not arrange insurance. Where a medical history is involved, an authorised adviser earns their keep: they know which insurers underwrite which histories sympathetically, they can approach several without you making multiple formal applications, and they can explain a written exclusion before you commit. Check any firm on the Financial Services Register before dealing with it. ^[2] If a decision later goes against you and the insurer’s final response does not resolve it, the Financial Ombudsman Service can decide the complaint free of charge. ^[5]

Sources

Financial Conduct Authority. About the FCA. Accessed 15 September 2026 (primary source)
Financial Conduct Authority. The Financial Services Register. Continuously updated; accessed 15 September 2026 (primary source)
Financial Conduct Authority. ICOBS: Insurance Conduct of Business (FCA Handbook). Accessed 15 September 2026 (primary source)
Financial Conduct Authority. The Consumer Duty. Accessed 15 September 2026 (primary source)
Financial Ombudsman Service. Annual complaints data and insight 2024/25. 2 July 2025 (primary source)
UK Parliament (legislation.gov.uk). Consumer Insurance (Disclosure and Representations) Act 2012. Enacted 8 March 2012 (primary source)
UK Parliament (legislation.gov.uk). Insurance Act 2015. Enacted 12 February 2015 (primary source)
British Heart Foundation. UK Cardiovascular Disease Factsheet. July 2026; accessed 15 September 2026 (primary source)
Diabetes UK. Diabetes statistics. Registration figures 2024-25; accessed 15 September 2026 (primary source)
Parkinson’s UK. Parkinson’s statistics. Accessed 15 September 2026 (primary source)
NHS. Coronary heart disease. Accessed 15 September 2026 (primary source)
NHS. Stroke. Accessed 15 September 2026 (primary source)
NHS. Type 2 diabetes. Accessed 15 September 2026 (primary source)
NHS. Menopause. Accessed 15 September 2026 (primary source)
NHS England. Consultant-led referral to treatment waiting times. Accessed 15 September 2026 (primary source)
Association of British Insurers and GRiD, reported by Cover Magazine. Protection insurers paid £7.84bn in 2025. Accessed 15 September 2026 (primary source)
NHS. Multiple sclerosis. Accessed 15 September 2026 (primary source)
NHS. Endometriosis. Accessed 15 September 2026 (primary source)
NHS. High blood pressure (hypertension). Accessed 15 September 2026 (primary source)
NHS. Heart attack. Accessed 15 September 2026 (primary source)
NHS. Epilepsy. Accessed 15 September 2026 (primary source)