Why do chronic conditions sit outside most policies?

Private medical insurance is built around treatment that is expected to resolve a problem, rather than care that manages a condition on an ongoing basis. A chronic condition, by definition, needs continuing management rather than a one-off course of treatment, so insurers generally exclude it and leave that care with the NHS, which already manages long-term conditions as a matter of course. This is a structural feature of how the product is designed, not an isolated insurer choice, which is why it appears across most policies in broadly similar form.

Does an exclusion found at claim time mean the insurer has acted unfairly?

Not necessarily, but it is worth checking carefully. Exclusions should be set out in the policy wording and summarised in the Insurance Product Information Document before you buy, so in principle nothing should come as a complete surprise at claim stage. In practice, the Financial Ombudsman’s medical insurance casework shows that disputes often arise precisely because an exclusion was not understood until a claim was refused. If this happens, ask the insurer in writing which clause the decision rests on, and use the complaints route if you disagree with the answer.

Can an exclusion ever be removed from an existing policy?

It depends on the exclusion and the underwriting basis. Under a moratorium approach, a condition excluded at the outset can become eligible once you complete a defined trouble-free period without symptoms, treatment or advice for it. Under full medical underwriting, exclusions set out in writing at the start are usually permanent unless the insurer agrees otherwise. If you think an exclusion no longer reflects your circumstances, ask the insurer directly and get any change confirmed in writing before relying on it for a future claim.

Health insurance

What does private health insurance not cover?

The short answer

Standard exclusions include chronic conditions needing ongoing management, pre-existing conditions unless agreed in writing, emergency care, routine pregnancy and childbirth, and cosmetic treatment. Every policy lists its own exclusions in the full wording — the IPID summarises them, the wording governs. Read the exclusions before you buy, not at claim.

Written by Emma Leadbetter. Reviewed by Stuart Hendy.

Published 15 September 2026. Last reviewed 15 September 2026. Next review due 15 December 2026.

What to know about what health insurance does not cover

Chronic conditions needing ongoing management are a standard exclusion and stay with the NHS. Read more
Pre-existing conditions are excluded under both main underwriting bases unless agreed in writing. Read more
Wordings commonly also exclude emergencies, routine maternity, cosmetic treatment and specific activities. Read more
Exclusions found only at claim stage are a recurring source of disputes with insurers. Read more

Thinking about what health insurance does not cover

What works well

Exclusions are listed in the wording, so they can be checked in advance.
The IPID summarises the significant exclusions on a few pages.
The Ombudsman route exists when an exclusion is applied unfairly.

What to watch

Chronic and pre-existing exclusions catch most people by surprise.
Summaries simplify — the full wording is what the insurer applies.
An exclusion applied to a claim can be challenged through the complaints route.

The exclusions that matter most

The largest structural exclusion is chronic conditions: treatment intended to manage rather than resolve stays with the NHS. Pre-existing conditions are excluded under both main underwriting bases unless the insurer agrees otherwise in writing. Beyond those, wordings commonly exclude emergency treatment, routine maternity, cosmetic procedures and treatment arising from particular activities or self-inflicted causes — but the exact list is policy-specific. The Financial Ombudsman’s medical insurance casework shows that exclusions discovered at claim stage, rather than at purchase, are a recurring source of disputes.

Before buying, ask the insurer to confirm in writing how its exclusions apply to your own disclosed history, and file the answer with the policy. Whatever the specifics of what health insurance does not cover, the discipline that protects you is always the same: get the insurer’s position in writing before treatment, keep the documents, and compare like with like. The CMA’s private healthcare market investigation imposed order-backed requirements on the private hospital market precisely because opacity on price and information harms patients. ^[1] The Private Healthcare Information Network exists to publish comparable performance and pricing information for private hospitals. ^[2]

Related guides

Common questions

Why do chronic conditions sit outside most policies?: Private medical insurance is built around treatment that is expected to resolve a problem, rather than care that manages a condition on an ongoing basis. A chronic condition, by definition, needs continuing management rather than a one-off course of treatment, so insurers generally exclude it and leave that care with the NHS, which already manages long-term conditions as a matter of course. This is a structural feature of how the product is designed, not an isolated insurer choice, which is why it appears across most policies in broadly similar form.
Does an exclusion found at claim time mean the insurer has acted unfairly?: Not necessarily, but it is worth checking carefully. Exclusions should be set out in the policy wording and summarised in the Insurance Product Information Document before you buy, so in principle nothing should come as a complete surprise at claim stage. In practice, the Financial Ombudsman’s medical insurance casework shows that disputes often arise precisely because an exclusion was not understood until a claim was refused. If this happens, ask the insurer in writing which clause the decision rests on, and use the complaints route if you disagree with the answer.
Can an exclusion ever be removed from an existing policy?: It depends on the exclusion and the underwriting basis. Under a moratorium approach, a condition excluded at the outset can become eligible once you complete a defined trouble-free period without symptoms, treatment or advice for it. Under full medical underwriting, exclusions set out in writing at the start are usually permanent unless the insurer agrees otherwise. If you think an exclusion no longer reflects your circumstances, ask the insurer directly and get any change confirmed in writing before relying on it for a future claim.

Sources

Competition and Markets Authority. Private Healthcare Market Investigation Order 2014. 1 October 2014 (primary source)
Private Healthcare Information Network. About private hospital pricing in the UK. Updated 16 June 2026 (primary source)