Private medical insurance (PMI) isn't a replacement for the NHS: it works alongside it. For most people who hold a policy, the NHS stays their first port of call for emergencies and long-term conditions, while private cover is there to speed up diagnosis and treatment for the kinds of problems that would otherwise mean a long wait. Understanding where each one fits is the key to deciding whether private cover is worth it for you.

Why more people are looking at private cover

Interest in private cover has grown alongside the pressure on NHS waiting lists. In spring 2026, around 7.2 million treatment pathways were waiting to start in England (roughly 6 million individual patients) with about 2.5 million of those waiting more than 18 weeks. The median wait for non-urgent (elective) treatment was just under 12 weeks, compared with around 7 weeks before the pandemic. The NHS has been bringing the longest waits down and met an interim waiting-times target in early 2026, but the constitutional standard of treating 92% of patients within 18 weeks has not been met for years and is not expected to be restored until 2029.

Against that backdrop, take-up of private cover has risen. Industry analysis estimates that around 8 million people in the UK are now covered by some form of private medical cover: roughly one in eight, the highest share since 2008. (Figures change regularly, so treat these as a snapshot rather than a fixed number.)

What private medical insurance actually covers

PMI is built around acute conditions: illnesses or injuries that come on and are expected to respond to treatment and lead to a full recovery, such as a hernia, a cataract, a joint that needs replacing, or a new symptom that needs investigating quickly. Its two core benefits are speed and choice: faster access to diagnosis and treatment, and the ability to choose your consultant, hospital and appointment times rather than waiting for the next available NHS slot.

Where private cover helps most

In practice, the advantages tend to fall into three areas:

• Faster access to diagnosis, specialists and treatment, avoiding long waiting lists.
• Choice of hospital, consultant and appointment times.
• Comfort, such as a private room during a hospital stay.

For acute problems where a delay means weeks or months of pain or uncertainty (a knee that needs replacing, or a symptom that needs a scan) that speed is the main reason people value cover.

Where the NHS remains your safety net

Private cover is designed to sit on top of the NHS, not replace it. The NHS remains the right route (and in most cases the only route) for:

• Accident and emergency care (A&E).
• Long-term chronic conditions that need ongoing management.
• Routine GP services and most maternity care.
• Complex or highly specialised treatment, including intensive care.

Most PMI policies specifically exclude emergencies and chronic conditions, so the NHS is your safety net for anything urgent or ongoing.

What PMI usually doesn't cover

Cover varies between insurers, but standard policies typically exclude:

• Chronic conditions: long-term illnesses with no cure that need ongoing management, such as diabetes, asthma, high blood pressure and arthritis. These can be managed but not cured, so they stay with the NHS.
• Pre-existing conditions, depending on how your policy is underwritten (see below).
• Emergency treatment and A&E.
• Normal pregnancy and childbirth.
• Cosmetic treatment, and conditions arising from things like self-inflicted injury or drug or alcohol misuse.

A policy may still cover an acute flare-up or a new, unrelated condition even if you have a chronic illness: for example, covering a hip replacement for someone who also has well-managed diabetes, while the diabetes itself stays under NHS care.

How underwriting works: and why it matters

How your medical history is handled (known as "underwriting") affects exactly what you can claim for. There are three common approaches in the UK:

• Moratorium: the most common and quickest to set up. You don't complete a medical questionnaire; instead, conditions you've had symptoms, treatment or advice for in (usually) the last five years are excluded at the start. Under the "two-year rule", an acute pre-existing condition can become eligible later if you go two continuous years without symptoms, treatment or advice for it. Chronic conditions stay excluded.
• Full medical underwriting (FMU): you declare your history up front and the insurer tells you exactly what is and isn't covered, giving you certainty from day one. These exclusions are usually fixed.
• Continued personal medical exclusions (CPME): used when switching insurer, this carries your existing terms across so you don't lose cover for conditions that developed while you were insured.

Whichever you choose, none of these will cover chronic conditions. The real trade-off is speed and simplicity (moratorium) versus certainty about what's covered from the outset (full medical underwriting).

What affects the price

Premiums are priced individually, so two people can pay very different amounts. The main factors are your age, where you live (cover tends to cost more in London and the South East), the level of cover you choose (full outpatient cover and a wide hospital list cost more than inpatient-only cover), and your excess: the amount you agree to pay towards a claim. Choosing a higher excess usually lowers the premium. Premiums also include Insurance Premium Tax, currently 12%.

Using the NHS and private cover together

Many people use both. You might be diagnosed by your NHS GP and then choose to have the treatment done privately to avoid a wait, or use private cover for a fast diagnosis and then continue any long-term care on the NHS. The two systems are designed to work side by side, and using private cover doesn't affect your right to NHS care.

Questions to ask before you buy

• Does the policy cover outpatient consultations and diagnostics, or only inpatient and day-patient treatment?
• How will your medical history be underwritten, and what will be excluded?
• Is mental health, dental or optical cover included or an optional extra?
• What is the excess, and how does it affect the premium?
• Are there limits on therapies, cancer cover, or specific treatments?
• Which hospitals and consultants can you use?

The bottom line

If fast access and choice matter to you (and the premium fits your budget) PMI can offer real peace of mind for acute problems that would otherwise mean a long wait. It works best when you're clear on what it's for: speed and choice for treatable conditions, with the NHS still there for emergencies and long-term care. Because cover, exclusions and underwriting vary significantly between insurers, comparing policies carefully (or speaking to an adviser) is the best way to make sure a policy does what you need it to.