What private medical insurance actually covers
Private medical insurance (PMI) is designed to sit alongside the NHS, not replace it. It typically pays for the diagnosis and treatment of acute, curable short-term conditions — think a hip replacement, a hernia repair, cancer treatment, or investigations for a worrying symptom. The main appeal is speed and choice: policyholders can usually get a specialist appointment, a scan and elective surgery in weeks rather than months, often in a private hospital with a single room and more flexible visiting hours.
Cover generally includes consultant fees, diagnostic tests (MRI, CT, blood tests), in-patient and day-patient treatment, and sometimes outpatient physiotherapy or mental health support, depending on the policy tier. Many insurers also offer a "NHS cash benefit" if you choose to use the NHS for a covered condition instead of claiming privately.
What PMI usually excludes
Almost all policies exclude emergency care — if you have an accident or a medical emergency, you go to A&E via the NHS, not through your insurer. Other common exclusions include:
- Pre-existing medical conditions, at least for a period, depending on the underwriting type
- Chronic or long-term conditions (such as diabetes or asthma) once they become "ongoing management" rather than a one-off treatable episode
- Normal pregnancy and childbirth
- Cosmetic treatment, and most GP consultations
- Organ transplants and, on many policies, treatment for conditions related to drug or alcohol misuse
Because chronic conditions fall outside cover, PMI is not a substitute for the NHS's role in ongoing, long-term care — it complements it for specific, treatable problems.
Individual vs employer-provided cover
You can buy PMI yourself as an individual policy, or it may be offered as a workplace benefit. Employer-provided PMI is convenient and often cheaper as part of a group scheme, but it counts as a taxable benefit-in-kind: HMRC treats the value of the premium as extra income, so you'll pay Income Tax on it (usually collected via your tax code or a P11D adjustment), and your employer pays Class 1A National Insurance on it. It's worth checking your P11D or payslip to see the cash value being reported, since this affects your overall tax position.
If you leave that job, cover typically ends, so anyone with an ongoing condition being monitored privately should think about continuity before resigning or being made redundant.
What affects your premium
Insurers price PMI based on several factors:
| Factor | Effect on premium |
|---|---|
| Age | Premiums rise steadily with age, and can increase sharply from your 50s onwards |
| Smoking status | Smokers typically pay more, reflecting higher claims risk |
| Level of cover | Comprehensive cover (mental health, outpatient, cancer add-ons) costs more than core in-patient-only cover |
| Excess chosen | A higher voluntary excess (what you pay towards a claim) lowers the premium |
| Location and hospital list | Cover restricted to a local hospital network is usually cheaper than an "any hospital" nationwide list |
Moratorium vs full medical underwriting
There are two common ways insurers assess pre-existing conditions:
Moratorium underwriting
You don't need to disclose your full medical history upfront. Instead, any condition you've had symptoms of, tested for, or been treated for in the five years before the policy started is automatically excluded, usually for a set period (commonly two continuous years symptom-free), after which it may be covered.
Full medical underwriting
You complete a detailed medical questionnaire, and the insurer decides upfront which conditions are excluded, loaded (priced higher) or covered as normal. This gives more certainty about what is and isn't covered from day one, which some people prefer.
Is it worth it alongside the NHS?
PMI makes most sense for people who value speed of access, want a choice of consultant or hospital, or have the means to treat it as a discretionary spend rather than a financial necessity. For many households, an emergency fund plus reliance on NHS care may be a more cost-effective approach, especially given that PMI premiums rise with age just as retirement income often falls. It's worth comparing quotes annually, since loyalty rarely earns a discount with insurers, and checking whether cash-strapped years might be better served by cheaper "hospital cash plans" that pay a fixed daily amount instead of full treatment costs.
Key takeaways
- PMI speeds up access to diagnosis and elective treatment but does not cover emergencies, chronic conditions or normal pregnancy
- Employer-provided PMI is a taxable benefit-in-kind, so check the Income Tax impact on your payslip or P11D
- Premiums depend on age, smoking status, level of cover and excess, and tend to rise as you get older
- Moratorium underwriting is simpler at outset; full medical underwriting gives more certainty about pre-existing conditions
- Weigh the cost of ongoing premiums against self-insuring through an emergency fund, particularly later in life