Private Health Insurance & Pre-Existing Conditions UK
Knowledge Hub · Pre-Existing Conditions

Private Health Insurance and Pre-Existing Conditions: The Complete UK Guide

Having a pre-existing medical condition doesn't mean you can't take out private health insurance in the UK. What changes is how it's assessed, and that depends entirely on which underwriting you choose.

This guide explains what a pre-existing condition is, how moratorium, full medical and switch underwriting all work, and how to compare providers if you have a medical history.

GP consulting with a patient about their medical history

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At A Glance

Pre-Existing Conditions At A Glance

Some useful information to know before you compare your options.

?

What Counts As Pre-Existing

An illness, injury or symptom you've had medication, advice, treatment or tests for before your policy starts, even without a formal diagnosis.

5

The Look-Back Period

Under the moratorium, insurers typically exclude conditions you've had advice, symptoms or treatment for in the 5 years prior to your policy starting.

2

The Qualifying Period

You must go 2 continuous years symptom, treatment and advice-free after your policy starts, for a pre-existing condition to become covered under the moratorium.

You Can Still Get Cover

In almost all cases you'll still be offered a policy. The condition and potentially associated conditions may be excluded initially, while everything else is covered normally.

!

Chronic Conditions

Long-term conditions like diabetes or asthma without a known cure are usually excluded regardless of underwriting type, as health insurance is designed for new, treatable (acute) conditions.

Switching Insurers

If you're already covered you may want to consider Continued Personal Medical Exclusions (CPME) which can let you switch provider without losing your existing medical history.

Underwriting Explained

The Different Types Of Medical Underwriting

When you apply for cover, you'll usually be asked to choose how the insurer assesses your medical history. This choice has a big impact on what's covered and when. See our full medical underwriting explained guide for a deeper breakdown, including how this varies by insurer and what happens when you switch.

M

Moratorium Underwriting

The most common option. No medical questionnaire upfront, your history is only reviewed if you make a claim. Conditions from the past 5 years are excluded until you go 2 continuous years symptom, advice and treatment free.

5 Years
Before
Policy
Starts
2 Years
Later
Must be symptom, treatment and advice free
Your medical history is checked hereNow covered

If you see a GP or get any treatment or advice for that condition during the 2-year wait, the clock resets from that point.

F

Full Medical Underwriting

You complete a detailed health questionnaire when you apply, and the insurer may contact your GP. You'll know exactly what's covered and what's excluded from day one, FMU has more certainty than moratorium underwriting.

C

Continued Personal Medical Exclusions

For people switching insurers. Your existing exclusions carry over to the new policy, so you don't lose progress towards a condition becoming covered.

D

Medical History Disregarded

Less common, usually available via employer schemes. Covers all pre-existing conditions with no exclusions, subject to the policy's standard terms.

Which Underwriting Type Is Right For You?

M Want Speed?

Moratorium underwriting is fast and simple with less admin, there is some uncertainty about historic conditions until claim stage.

F Want Certainty?

Full medical underwriting tells you exactly what's covered from day one, useful if you have a specific condition.

C Already Insured?

Ask about CPME when comparing quotes so you don't lose the medical history you've already built up.

Why Use A Broker

The Benefits Of Working With A Broker

A medical history genuinely changes which insurer, and which underwriting type, actually suits you. This isn't something a generic comparison table can capture well, but it's exactly what a broker deals with every day.

  • They know which insurers are genuinely more lenient for specific conditions
  • They can confirm CPME eligibility for your condition before you switch, not after
  • They understand which underwriting type suits your particular history
  • Whole-of-market, not tied to one insurer's own exclusion policies
  • Ongoing support if a claim for an existing condition is ever queried
Speaking to a broker about health insurance with a pre-existing condition
FAQs

Pre-Existing Conditions FAQs

Common questions about getting private health insurance with a medical history.

Will I be refused private health insurance because of a pre-existing condition?

It's rare to be refused outright. In almost all cases you'll still be offered a policy, the condition itself may just be excluded, at least initially, rather than the whole application being declined. Under moratorium underwriting this exclusion isn't even permanent, if you go two continuous years without symptoms, treatment or advice for it, cover can kick back in automatically. Full medical underwriting gives you more certainty upfront, since the insurer confirms exactly what's excluded in writing before you join.

Do I have to declare a pre-existing condition?

Under full medical underwriting, yes, you must fully and accurately disclose your medical history at the point of application, and the insurer may contact your GP for further detail. Under moratorium underwriting you don't need to declare it upfront, since a rolling 5-year look-back applies automatically instead, but it will still be reviewed if you make a related claim, so accuracy matters either way, misrepresenting your history can affect a claim later on.

Can a pre-existing condition ever become covered?

Under moratorium underwriting, yes, if you go two continuous years without symptoms, treatment, medication or advice for that condition after your policy starts, it can become covered automatically. Worth knowing too, most insurers also exclude any closely associated conditions during this period, not just the exact one, so it's worth checking exactly what that covers with our broker partners. Under full medical underwriting, exclusions are less commonly reviewed automatically, though some insurers will reassess on request.

Can I switch insurers if I have a pre-existing condition?

Yes, in two different ways depending on your situation. Continued Personal Medical Exclusions (CPME) carries over your specific accepted exclusions to a new insurer, regardless of your original underwriting type. If your current policy was already on moratorium terms specifically, Continued Moratorium (CMORI) is usually the better option instead, it carries over the actual moratorium clock itself, so time you've already served counts, rather than starting a fresh wait with the new insurer.

What counts as a pre-existing condition?

Generally, anything you've had symptoms, treatment, medication or medical advice for, including a GP consultation, in the years before your policy starts, most commonly the past 5 years under moratorium underwriting. This applies even if you were never formally diagnosed, if you sought advice or had symptoms, insurers typically still treat it as pre-existing. It's a broader definition than most people expect, worth bearing in mind when comparing cover.

Need Help Comparing Cover For Your Medical History?

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How To Switch

See our full step-by-step switching guide, including CPME in detail.

Compare Health Insurance From The UK's Leading Insurers

Aviva
AXA Health
Bupa
Freedom Health Insurance
National Friendly
The Exeter
Vitality
WPA
Saga
Our free comparison service makes it easy to compare health insurance from the UK's leading insurers, helping you compare cover, benefits and prices in one place.
Compare Health Insurance Quotes
4.6 · Rated Excellent on Trustpilot

Sources & Disclaimer

General underwriting terms outlined in this guide reflect common industry practice among UK private medical insurers as of 2026. Exact look-back periods, qualifying periods and exclusion terms vary by insurer and policy, always check your specific policy documents or speak to one of our advisers before making a decision.

Any information provided on this page is for general information purposes only and should not be considered financial advice, regulated advice or a personal recommendation. Health insurance suitability depends on your individual circumstances, needs and budget.

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