Private health insurance and pre-existing conditions in the UK
Private medical insurance is designed to cover new conditions that arise after your policy starts. Conditions you already have — or have had — are usually treated differently, and how they are handled depends on the underwriting type you choose. Here is what that means in practice.
The essentials in 30 seconds
- Generally excluded at the outset: PMI usually will not pay for treatment of a condition you already had when the policy began — it covers new, unforeseen conditions.
- How it is excluded depends on underwriting: a moratorium parks recent conditions; full medical underwriting (FMU) declares them up front; switching may carry continued personal medical exclusions (CPME).
- Cover can sometimes come back: under a moratorium, a parked condition can become eligible after a symptom-, advice- and treatment-free period — commonly around two years.
- Always check the policy: exact wording, time windows and what counts as “pre-existing” vary by insurer, so read the terms or ask before you rely on cover.
How each underwriting type handles a pre-existing condition
| Underwriting type | How pre-existing conditions are treated |
|---|---|
| Moratorium | Recent conditions are automatically excluded without you declaring them. A condition is typically parked and can become eligible once you have gone a continuous period — commonly around two years — free of symptoms, treatment, medication and medical advice for it. |
| Full medical underwriting (FMU) | You declare your medical history up front. The insurer then specifically excludes named conditions, and may apply a premium loading or a special term for others, so you know where you stand from day one. |
| Switching (CPME) | When you move insurer, continued personal medical exclusions (CPME) carry your existing exclusions across so cover continues broadly as before — conditions excluded on the old policy generally remain excluded on the new one. |
Indicative summary for orientation only — not a quote and not advice. The exact treatment, wording and time periods depend on the insurer and the policy you choose.
What counts as a pre-existing condition?
A pre-existing condition is generally one you have already had, or shown signs of, before your cover started. Insurers usually look back over a defined window — often the few years before the policy began — at any condition for which you have had symptoms, taken medication, received treatment, been diagnosed, or sought medical advice.
Importantly, it does not only mean a formally diagnosed illness. Symptoms you noticed but never had checked, or a condition you are still under review for, can also be caught. Because the precise definition and look-back period vary between insurers, two policies can treat the same history differently. The private health insurance hub sets out how PMI cover works more widely.
Can cover for a pre-existing condition be added later?
Sometimes, but it is not guaranteed. Under a moratorium, a previously excluded condition can become eligible if you go a continuous qualifying period — commonly around two years — without symptoms, treatment, medication or advice for it. If the condition flares up within that window, the clock can restart.
Under full medical underwriting, a specific exclusion is more likely to be fixed for the life of the policy, though some insurers will review an exclusion on request after a settled period. Switching insurer rarely removes an existing exclusion on its own — CPME is designed to carry exclusions across, not clear them. If the underwriting choice matters to you, the comparison in moratorium vs full medical underwriting walks through the trade-offs in detail.
Pre-existing conditions and PMI FAQs
Information only — not medical or financial advice. Descriptions of how underwriting treats pre-existing conditions are general and indicative; exact terms, time periods and definitions vary by insurer, so always check the policy wording. My Insurance Expert is not an FCA-authorised intermediary and does not arrange or sell policies. Last updated: 2026-06-13