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The short answer
Most visitor medical policies cover new, sudden illness and accidents, and many exclude or limit pre-existing conditions such as hypertension, diabetes or heart disease unless they are declared and accepted. For an older parent, those conditions are the most likely reason for a hospital bill, so declare everything, read the exclusions, and buy cover that names the conditions it accepts. Not declaring a condition risks having a claim rejected.
When a parent visits from Nigeria, the host usually buys the insurance and also pays any bill the insurance does not. In the UK, visitors pay for most hospital care; in the US there is no public safety net for visitors; in Canada, the super visa requires private cover. This guide explains how visitor policies treat existing conditions, why that matters for older travellers, and how to compare policies. It is general information, not insurance advice.
What a pre-existing condition usually means
MoneyHelper, the UK's government-backed guidance service, says insurers differ but are likely to treat the following as pre-existing:
- Any condition the person is waiting for an operation on.
- Any condition they are awaiting test results for.
- Any condition, even a minor one, they have seen a doctor about in the past year.
- Any serious condition they have ever had, such as cancer, heart trouble or respiratory problems.
MoneyHelper says all existing conditions must be declared, "otherwise you risk any claim you need to make being rejected", and that cover may not be available while someone is awaiting a diagnosis. For a parent in their sixties or seventies, the list above often includes blood pressure, diabetes, arthritis or a past stroke.
Why exclusions matter more for visiting parents
- The likely claims are the excluded ones. A complication of long-standing hypertension, such as a stroke, may be treated as related to a pre-existing condition.
- Hospital costs for visitors are high. GOV.UK's NHS migrant health guide says chargeable visitors pay 150% of the NHS cost, non-urgent treatment must be paid in advance, and debts of £500 or more unpaid for two months may be shared with the Home Office, which can affect future visa applications.
- Long flights and climate change can trigger problems that would be routine at home, from swollen legs to chest infections in winter.
- Medication runs out. Check whether the policy pays for replacing routine medicines at all; assume it does not unless the wording says so.
Rules that set a minimum
Canada super visa
IRCC requires super visa applicants to hold private health insurance from a Canadian insurance company, or a foreign insurer authorised by OSFI, covering health care, hospitalisation and repatriation, with at least C$100,000 of emergency cover, valid for at least one year from each entry. IRCC says quotes are not accepted and that brokers and claims administrators do not count as insurers. These are minimums; they do not require the policy to cover existing conditions, so check that separately.
UK and US
GOV.UK's Standard Visitor page does not require health insurance, and the US State Department's visitor visa page does not set an insurance rule for ordinary visitors. Not being required is different from not being needed: both countries charge visitors for hospital care.
How to compare policies
| Check | Why it matters |
|---|---|
| Is each declared condition accepted, excluded, or covered only for a stable condition? | "Stable" clauses can fail if medication changed recently. |
| Maximum age and any age bands | MoneyHelper notes cover may be unavailable because of age; prices also vary widely. |
| Medical limit and excess | A low limit or high excess can leave a large share of a hospital bill unpaid. |
| Repatriation to Nigeria | Needed if a parent must fly home with medical support. |
| Who pays the hospital | Some insurers pay hospitals directly; others reimburse you after you pay. |
| Start date and length | Cover should start on departure from Nigeria and last the whole stay. |
MoneyHelper points to its Travel Insurance Directory for firms that cover serious medical conditions, and suggests using a broker found through the British Insurance Brokers' Association. In other countries, use the insurance regulator's register to check a firm is authorised.
Worked example
Example only. Mama Ngozi, 68, has controlled high blood pressure. Policy A costs £180 and excludes all pre-existing conditions. Policy B costs £420 and accepts her blood pressure after a medical screening. She is admitted for two nights with a stroke-related complication, and the bill is £6,000. Under Policy A the insurer may decline as related to her hypertension, leaving the family to pay £6,000. Under Policy B, with a £100 excess, the family pays £100. The £240 difference in premium is small next to the risk.
Before the parent travels
- Get a short letter from their doctor in Nigeria listing conditions and medicines; carry copies of prescriptions.
- Pack enough medication for the stay plus a margin.
- Save the insurer's emergency number in both your phones.
Where Pryme fits
Pryme does not sell travel or medical insurance. If you pay a premium or an unexpected bill in pounds, dollars or euros, a Pryme account holds those currencies alongside naira, and you can move only what you need with Swap. For cover while parents are back in Nigeria, see health insurance for parents in Nigeria, and for the whole visit budget, hosting parents visiting from Nigeria. Outside Nigeria, Pryme's activities are carried out through regulated partners (how it works).
Questions people ask
Does visitor insurance cover high blood pressure?
Only if the policy accepts it after you declare it. Many policies exclude pre-existing conditions by default, so read the exclusions and ask the insurer in writing.
What happens if I don't declare my parent's diabetes?
MoneyHelper says undeclared conditions risk any claim being rejected, even for something that seems unrelated.
How much cover does the Canada super visa need?
IRCC requires at least C$100,000 of emergency cover from a Canadian or OSFI-authorised insurer, valid for at least one year from entry.
Is health insurance required for a UK visitor visa?
GOV.UK's Standard Visitor page does not require it, but visitors are charged for most NHS hospital treatment.
Sources
- MoneyHelper: Travel insurance if you have a medical condition · accessed Oct 2026
- GOV.UK: NHS entitlements, migrant health guide · accessed Oct 2026
- IRCC: Super visa, forms and documents · accessed Oct 2026
- GOV.UK: Visit the UK as a Standard Visitor · accessed Oct 2026
- US State Department: Visitor visa · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.