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How to prove pre existing conditions?
To prove pre-existing conditions for travel insurance, you must provide a full medical summary or GP letter that matches the declarations made during your application. Insurers do not typically require physical proof at the point of purchase, but they will verify your medical history against your NHS records if you make a claim. You prove your honesty by accurately answering the medical screening questions and ensuring every diagnosis, medication, and pending investigation is disclosed. This guide explains the medical screening process, how insurers verify health records, and the documentation required to ensure your policy remains valid for your trip.



Key facts
- Typical cost range
- £25-£150 per person for a typical 1-week trip with conditions (UK-priced 2026)
- Non-disclosure rate
- FOS data shows non-disclosure is a leading cause of rejected claims
- GHIC coverage
- Covers state-funded care in EU/EEA but £0 for repatriation
- Screening timeframe
- Most UK insurers ask for history from the last 2 to 5 years
- USA medical costs
- Emergency treatment can exceed £5,000 per day without insurance

TL;DR
To prove pre-existing conditions, you must accurately declare all medical history during screening. Insurers verify this by checking your NHS GP records during the claims process. Honesty is the only way to ensure your policy is valid; any discrepancy between your declaration and your medical records can lead to rejected claims.
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Why declaring medical history matters
Declaring your medical history is a legal requirement under the Consumer Insurance (Disclosure and Representations) Act 2012. If you fail to mention a condition, your insurer can legally void your policy or reject a claim, even if the claim is unrelated to the hidden condition. Accuracy is vital because travel insurance exists to cover the financial risk of emergency medical treatment abroad, which can cost tens of thousands of pounds. By being transparent, you ensure that the premium you pay provides genuine protection and that the insurer has correctly assessed the risk of you requiring care while away.
- Ensures emergency medical expenses are covered
- Prevents the policy from being voided for non-disclosure
- Covers cancellation costs if you become too ill to travel
- Provides access to 24-hour medical emergency helplines
- Guarantees that repatriation to the UK is included if necessary
What counts as a pre-existing condition?
In the UK insurance market, a pre-existing condition is generally defined as any medical trend, illness, or injury you have sought advice for within a specific timeframe - usually the last two to five years. This includes chronic conditions like asthma or diabetes, but also encompasses recent surgeries, heart conditions, and mental health issues. Even if a condition is well-managed with medication and you feel healthy, it must be disclosed. Insurers also look for 'undiagnosed' symptoms; if you are currently awaiting tests or a consultant appointment, most standard policies will not provide cover until a diagnosis is confirmed and disclosed.
What is not covered by medical travel insurance?
Even with a medical policy, certain exclusions apply. Most insurers will not cover claims arising from conditions where you are travelling against the advice of a doctor or travelling specifically to seek medical treatment abroad. Furthermore, if you are on a waiting list for inpatient treatment or have received a terminal prognosis with a short life expectancy, standard cover may be restricted. Any condition that was not declared during the initial screening process is automatically excluded from the policy, meaning you would have to pay for any related hospital fees or transport costs yourself.
- Travelling against the advice of a medical professional
- Conditions currently under investigation with no diagnosis
- Medical tourism or elective surgeries abroad
- Conditions not disclosed during the screening process
- Symptoms present at the time of booking but not reported
Typical costs and pricing factors
The cost of travel insurance with pre-existing conditions varies significantly based on the severity of the illness and the destination. For a one-week trip to Europe, a traveller with a well-managed condition like hypertension might see a premium increase of only £10-£20. However, for complex conditions such as stage 3 cancer or recent heart surgery, premiums can rise by hundreds of pounds. The destination is a major factor; countries with high healthcare costs, such as the USA, Canada, or Spain, will always attract higher premiums for those with medical histories because the potential claim value is much higher.
How to choose the right medical cover
When selecting a policy, do not simply choose the cheapest option. Look for insurers that use a recognised medical screening system, such as Protectif or Verisk, which allow for a nuanced assessment of your health. If you have several complex conditions, you may need a specialist medical insurer rather than a high-street provider. It is also important to consider the 'excess' - the amount you pay towards a claim. Some policies have a higher excess for medical claims, so ensure this is affordable. Check if the policy includes 'End Suited' cover which protects you if your condition changes between buying the policy and flying.
The claims process and providing evidence
If you need to make a medical claim, the burden of proof lies with you and your medical team. The insurer's claims department will request access to your NHS Summary Care Record or ask your GP to complete a medical certificate. This is where you 'prove' your conditions. If the GP records show you were prescribed medication or sought advice for a condition you did not declare, the claim will likely be rejected. It is helpful to keep an up-to-date list of your medications and dosages to ensure your initial declaration is 100% accurate, matching what is on your official medical record.
- Request a copy of your NHS medical summary before applying
- Keep all receipts for prescriptions and emergency treatment
- Ensure your GP is willing to support your claim with records
- Contact the insurer's emergency line before starting treatment
- Provide the insurer with the hospital's admission and discharge notes
Regulatory context and the GHIC
The Financial Conduct Authority (FCA) regulates how UK insurers handle medical disclosures. They require firms to be clear and fair, but they also support the insurer's right to refuse claims based on non-disclosure. If you are travelling to the EU, you should carry a Global Health Insurance Card (GHIC). While the GHIC provides access to state-provided healthcare at the same cost as a local, it is not a substitute for insurance. It does not cover private medical costs, mountain rescue, or repatriation to the UK. Most insurers insist you have a GHIC but still require full medical disclosure to cover the gaps it leaves.
Practical checklist for medical declarations
Before you buy your policy, gather all necessary information to ensure your 'proof' is ready for any future claim. Accuracy at the start prevents stress at the end. Make sure you have the exact names of your conditions as written by your consultant, a list of all current medications, and the dates of any surgeries or hospital admissions from the last few years. If your health changes after you have bought the policy but before you travel, you must call the insurer to update your details, as failing to do so could invalidate your cover for the entire trip.
- Confirm every diagnosis name with your GP
- List all medications and their specific dosages
- Note the dates of all hospital stays in the last 2-5 years
- Check FCDO advice for your destination's health risks
- Update the insurer immediately if your medication changes
Policy checklist
- Medical cover limit at least £2 million (£5m+ for long-haul)
- Cancellation limit covers the full cost of your trip
- Excess you'd be willing to pay per claim
- Activity list includes everything you've planned
- Age limits and medical screening completed
- Cruise / winter sports / golf extras if needed
Insurance disclaimer: This page is general guidance, not regulated financial advice. Cover, limits, excesses and exclusions vary by insurer and policy. Always read the policy wording.
Affiliate disclosure: Holiday Insured may earn a commission when you click through to a provider and buy a policy. This does not affect what you pay or which policies we describe. Read our full affiliate disclosure.
Related guides
Frequently asked questions
Plain English answers to common holiday insurance questions.

Sources and further reading
- FCDO foreign travel insurance guide
- MoneyHelper on medical conditions
- Financial Ombudsman on non-disclosure
- NHS Global Health Insurance Card
Sources are independent UK authorities. Holiday Insured is not affiliated with any of the bodies listed. Read our editorial policy.
Written by
Holiday Insured Editorial Team
Reviewed by
Josh T.
Last updated
12 June 2026
Read our editorial policy. This content is general guidance and not regulated financial or medical advice.