
As an FCA-authorised broker that has helped arrange over 800,000 policies, WeCovr understands the UK private medical insurance market inside and out. This guide explains how PMI covers crucial diagnostic scans like MRIs, helping you bypass long NHS waits and get the peace of mind you deserve.
When you’re feeling unwell and your GP suspects something might be wrong, waiting for a diagnosis can be one of the most stressful experiences imaginable. Diagnostic scans are the key to understanding what’s happening inside your body, but accessing them quickly on the NHS isn't always possible. This is where private medical insurance (PMI) can be a lifeline.
This comprehensive guide will walk you through everything you need to know about MRI, CT, and PET scans, how private health cover works, and how you can get fast access to the tests you need.
Before we delve into insurance, let's demystify the main types of diagnostic scans. While they all provide images of your body's interior, they work in different ways and are used to diagnose different conditions.
An MRI (Magnetic Resonance Imaging) scan uses powerful magnets and radio waves to create incredibly detailed images of your organs and tissues. It's particularly good for looking at soft tissues.
A CT (Computed Tomography) scan uses X-rays and a computer to create cross-sectional images of your body. Think of it like looking at individual "slices" of your body, which can be combined to form a 3D picture.
A PET (Positron Emission Tomography) scan is a more specialised imaging test that helps reveal how your tissues and organs are functioning at a cellular level. It's excellent at highlighting areas of high chemical activity.
Often, PET scans are combined with CT scans (a PET-CT) to provide a single, highly detailed image showing both your body's structure (from the CT) and its metabolic function (from the PET).
| Feature | MRI Scan | CT Scan | PET Scan |
|---|---|---|---|
| Best For | Soft tissues, joints, brain, spine | Bones, internal organs, blood clots | Cancer detection, cell function, brain disorders |
| How it Works | Strong magnets and radio waves | Multiple X-rays from different angles | Radioactive tracer and gamma ray detection |
| Radiation | None | Yes (low dose) | Yes (low dose) |
| Scan Time | 30–90 minutes | 10–30 minutes | 30–60 minutes (plus waiting time) |
| Noise Level | Very loud | Relatively quiet | Relatively quiet |
The NHS provides excellent care, but it is under immense pressure. One of the most significant challenges for patients is the waiting time for diagnostic tests.
According to the latest NHS England statistics, the waiting list for diagnostic tests remains a major concern. In early 2025, over 1.6 million people were waiting for one of 15 key diagnostic tests, including MRI and CT scans. The NHS constitution states a target that 99% of patients should wait no more than six weeks for a diagnostic test. However, recent data shows that around 20% of patients—over 300,000 people—are waiting longer than this six-week target.
For many, this waiting period is filled with anxiety and uncertainty. If the scan is needed to diagnose a serious condition like cancer, any delay can impact treatment outcomes and cause significant emotional distress.
This is the primary reason why hundreds of thousands of people in the UK turn to private medical insurance. PMI offers a way to bypass these queues and get a diagnosis in a matter of days, not weeks or months.
Private medical insurance is designed to cover the costs of private healthcare for acute conditions that arise after your policy begins. Diagnostic scans are a cornerstone of most PMI policies because they are essential for diagnosing these conditions.
It is vital to understand what UK PMI does and does not cover.
A Critical Note on PMI Coverage: Private medical insurance is designed to cover acute conditions – illnesses or injuries that are short-term and likely to respond quickly to treatment (e.g., a joint injury, appendicitis, or a new lump that needs investigation).
It does not cover:
- Pre-existing conditions: Any medical condition you had symptoms of, received advice for, or were treated for before your policy started.
- Chronic conditions: Long-term illnesses that require ongoing management rather than a cure, such as diabetes, asthma, or high blood pressure.
Diagnostic scans are covered when they are used to investigate the symptoms of a new, acute condition.
PMI policies are typically built around a core of inpatient cover. This means you are covered for treatment that requires a hospital bed, either overnight (inpatient) or for the day (day-patient).
However, diagnostic scans like MRI, CT, and PET are almost always performed on an outpatient basis, meaning you visit the hospital or clinic for the scan and go home the same day without needing a bed.
Therefore, to have your scans covered, you usually need a policy that includes outpatient cover.
Here’s how it breaks down in different types of policies:
| Policy Tier | Typical Outpatient Scan Coverage | Who It's Good For |
|---|---|---|
| Basic / Budget | Often no outpatient cover, or scans are only covered if they lead directly to an inpatient admission. | Those on a tight budget who are mainly concerned about major surgery costs. |
| Mid-Range | A limited amount of outpatient cover, for example, up to £1,000 per year. This is usually enough to cover a few consultations and one or two scans. | A good balance of cost and coverage for most people. |
| Comprehensive | Full outpatient cover. All eligible consultations, diagnostic tests, and scans are covered in full. | Those who want complete peace of mind and don't want to worry about financial limits. |
Real-Life Example:
An expert PMI broker like WeCovr can help you navigate these options, explaining the pros and cons of each level of cover to find a policy that matches your needs and budget perfectly.
When comparing private medical insurance in the UK, it’s crucial to look beyond the headline price. Here are the key factors to consider to ensure you have robust cover for diagnostic scans.
As discussed, this is the most important factor.
An excess is the amount you agree to pay towards a claim. For example, if you have a £250 excess and your MRI scan costs £500, you pay the first £250 and your insurer pays the remaining £250.
Insurers have agreements with networks of private hospitals. Your policy will come with a "hospital list" detailing where you can have your treatment and scans.
Many of the best PMI providers now offer "guided" options. This is where the insurer helps you choose a specialist from a pre-approved list. In return for this reduced choice, you often get a significant discount on your premium without compromising on the quality of care. This can be an excellent way to get comprehensive cover at a more affordable price.
Top-tier insurers often include valuable wellness benefits that can help you stay healthy and potentially avoid needing scans in the first place! Look for:
For example, when you arrange your policy through WeCovr, we provide complimentary access to our innovative AI-powered calorie and nutrition tracking app, CalorieHero, helping you manage your diet and health proactively. We also offer discounts on other types of cover, such as life or home insurance, when you purchase a PMI policy with us.
If you don't have private health cover, you can choose to "self-pay" for a diagnostic scan. This can be a good option if you only need a one-off test, but the costs can quickly add up if you require multiple scans or follow-up treatment.
Here are the typical starting prices for private scans in the UK in 2025. Prices vary significantly based on the part of the body being scanned and the location of the clinic.
| Scan Type | Typical Starting Price (Self-Pay) | Notes |
|---|---|---|
| MRI Scan | £300 – £750 | Scans of joints like the knee are often cheaper. More complex scans, like a full-body or cardiac MRI, can cost over £1,000. |
| CT Scan | £450 – £900 | Prices increase if a contrast dye is needed. A cardiac CT angiogram can cost upwards of £1,500. |
| PET-CT Scan | £1,500 – £2,500+ | This is one of the most expensive scans due to the complex technology and radioactive tracer involved. |
| Ultrasound Scan | £200 – £400 | A more common and less expensive scan, often used for abdominal issues, pregnancy, and muscle injuries. |
| X-ray | £100 – £200 | The most basic and cheapest form of imaging. |
Paying for these out-of-pocket can be a significant financial burden, especially if the scan reveals you need expensive surgery or treatment afterwards. A private hip replacement, for instance, can cost over £15,000. Private medical insurance is designed to protect you from these unexpected and potentially life-altering costs.
Making a claim on your PMI for a scan is usually a straightforward process. Here’s a typical step-by-step guide:
Visit Your GP: Your health journey almost always starts with your GP. You'll discuss your symptoms, and if they feel a specialist opinion is needed, they will write you a referral letter. This can be your NHS GP or a private digital GP service included with your policy.
Contact Your Insurer: Before booking anything, you must call your insurance provider's claims line. Tell them about your symptoms and your GP's referral. They will check your policy to confirm you are covered for the investigation.
Get Authorisation: If you are covered, the insurer will give you a pre-authorisation number. This is their promise to pay for the eligible treatment. They may also provide you with a list of approved specialists or diagnostic centres from your hospital list.
Book Your Appointment: You can now contact the specialist or hospital to book your consultation and scan, giving them your pre-authorisation number. The clinic will then bill your insurer directly.
Pay Your Excess (If Applicable): If your policy has an excess, the private hospital will usually send you an invoice for that amount directly. You pay your portion, and the insurer handles the rest.
The key is to always get pre-authorisation from your insurer before incurring any costs. Failing to do so could result in your claim being rejected, leaving you liable for the full bill.
While fast access to diagnostics is a huge benefit, modern private medical insurance in the UK offers much more. The best PMI providers focus on a holistic approach to your health and wellbeing.
Recognising the deep link between physical and mental health, most comprehensive policies now include excellent mental health cover. This can provide:
Should you need inpatient treatment, a private hospital offers a very different environment from a busy NHS ward. You can typically expect:
Choosing the right private health cover is an investment in your long-term health, offering not just a solution when things go wrong, but also tools to help you live a healthier life.
Navigating the world of private medical insurance can feel complex, but you don't have to do it alone. At WeCovr, our expert advisors are dedicated to helping you understand your options and find the perfect cover for your needs and budget.
We compare policies from across the UK's leading providers to find you the right protection at the right price, at no extra cost to you. Get fast access to the diagnostic scans you need, when you need them.
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