A private PET-CT scan typically costs £1,500–£2,500 self-pay — far more than MRI or CT, because of the short-lived radioactive tracer each scan requires. Most PET scans are used in cancer staging and monitoring, where health insurance with cancer cover generally pays in full. Purely self-referred PET scans are rare: scanners are limited and a specialist referral is essential.
- ✓Private PET-CT: typically £1,500–£2,500 — the most expensive routine scan in the UK.
- ✓Most PET scans are for cancer staging; insurers generally cover them within cancer pathways.
- ✓Availability is genuinely limited: fewer scanners, specialist referral required, tracer made to order.
What a private PET scan costs — and why it's the expensive one
PET (positron emission tomography, almost always combined with CT as PET-CT) sits at the top of the imaging price list: a private scan typically costs £1,500–£2,500, against £300–£500 for an MRI. The price isn't padding — each scan requires a dose of radioactive tracer, usually FDG, a glucose-based compound with a half-life of under two hours. It's manufactured in a cyclotron, delivered against the clock, and unusable within hours. You're paying for a small piece of nuclear medicine made to order.
| Scan | Typical self-pay price |
|---|---|
| PET-CT (single study, e.g. whole-body FDG) | £1,500–£2,500 |
| Specialised tracers (e.g. PSMA for prostate) | Often £2,000–£3,000+ |
| Private MRI, for comparison | £300–£500 per body part |
| Private CT, for comparison | £400–£800 |
| London vs rest of UK | London commonly at the top of the range |
Quotes normally include the tracer, the scan and the reporting by a specialist radiologist or nuclear medicine physician, but confirm this — a PET report is a specialist document and shouldn't be an optional extra.
What PET scans are actually for
PET is not a general-purpose scan, and that matters for anyone tempted to buy one for reassurance. Where MRI and CT show structure, PET shows activity — the tracer concentrates in tissue that's burning glucose fast, which is what many cancers do. That makes PET-CT powerful for a specific set of questions:
- Cancer staging. After a diagnosis, establishing whether and where cancer has spread — often the deciding factor between treatment plans.
- Treatment response. Checking whether chemotherapy or radiotherapy is working, sometimes before any change shows on CT.
- Recurrence. Investigating whether cancer has returned when bloods or symptoms raise suspicion.
- A smaller set of non-cancer uses. Certain heart, brain and inflammation questions — specialist territory, and a minority of scans.
What PET is not is a screening tool. It involves a meaningful radiation dose (the tracer plus the CT component), it lights up plenty of benign things — infection, inflammation, recent exercise — and no UK clinical body recommends it for symptom-free people. A specialist orders a PET scan to answer a defined question; that's the model privately as well as on the NHS.
How insurance handles PET scans
Here's the reassuring part: the situations where you genuinely need a PET scan are exactly the situations health insurance is built for. PET-CT ordered by your oncologist for staging, treatment monitoring or suspected recurrence sits inside the cancer pathway of a policy — and cancer cover on UK private medical insurance is typically comprehensive, paying for scans in full once authorised, separate from any outpatient limit on some policies.
That distinction matters when comparing policies. A plan with a modest outpatient diagnostics limit might cap what it pays towards a £400 MRI for a knee — but a £2,000 PET-CT within an authorised cancer claim is generally paid in full. If cancer cover is your priority, check how each insurer defines and funds its cancer pathway; our cancer cover guide walks through the differences.
The practical sequence with insurance: diagnosis or suspicion, oncologist recommends PET-CT, insurer pre-authorises, you attend an approved centre, the centre bills the insurer directly. Timelines are quick — authorisation typically takes a day or two, and private PET slots are usually available within days to a couple of weeks depending on tracer scheduling and where you live.
Self-pay is the fallback for people without cover — commonly those seeking staging faster than a local NHS queue, or a second-opinion pathway. At £1,500–£2,500 it's a serious outlay, and worth discussing with your NHS team first: the NHS funds PET-CT where it's clinically indicated, and roughly 1 in 4 patients wait over 6 weeks for diagnostics overall (NHS DM01, January 2026), but urgent cancer imaging is prioritised well ahead of that average. Live figures are on our waiting times tracker.
Cancer cover is where insurance earns its keep
Access, availability and what the scan involves
An honest note on availability: PET-CT is the least accessible scan in UK private healthcare. There are far fewer PET scanners than MRI machines, many are shared between NHS and private use or run by a small number of specialist networks, and scans are batched around tracer deliveries. Outside major cities, your nearest private PET-CT may be a significant drive away — and same-week availability, while common, isn't guaranteed the way it is for MRI.
Referral rules are stricter too. Direct-access booking — where a provider's own clinician approves your MRI request online — generally doesn't exist for PET. You'll need a referral from a consultant (typically an oncologist), because justifying the radiation dose and choosing the right tracer and protocol is specialist work. A GP letter alone is usually not enough.
The scan day itself: you fast for around six hours, receive the tracer injection, rest quietly for about an hour while it distributes, then lie in the scanner for 20–30 minutes. Allow two to three hours at the centre. Afterwards you're mildly radioactive for a few hours — centres advise keeping a sensible distance from pregnant women and small children for the rest of the day. The specialist report typically follows within 2–5 working days and goes to your referring consultant, who explains what it means for your treatment plan.
Frequently asked questions
How much does a private PET scan cost in the UK?
Typically £1,500–£2,500 for a standard whole-body FDG PET-CT, including the radioactive tracer and the specialist report. Specialised tracers such as PSMA for prostate cancer can push the price to £2,000–£3,000 or more, and London centres sit at the top of the range. That makes PET roughly five times the price of a private MRI.
Why are PET scans so much more expensive than MRI or CT?
The tracer. Each PET scan needs a dose of a radioactive compound — usually FDG — with a half-life under two hours, manufactured in a cyclotron and delivered against the clock. Add scarcer scanners, longer appointment slots and specialist nuclear-medicine reporting, and the £1,500–£2,500 price reflects genuine production cost rather than private-healthcare markup.
Will health insurance pay for a PET scan?
Generally yes, when it's part of an authorised cancer pathway — staging, treatment monitoring or investigating recurrence — where UK insurers typically pay for PET-CT in full, often outside any outpatient limit. Pre-authorisation is essential, and the referral needs to come from your consultant. A PET scan requested outside a clinical pathway, for reassurance, would not normally be covered.
Do I need a referral for a private PET scan?
Yes — and a consultant referral, not just a GP letter. PET involves a meaningful radiation dose and specialist protocol choices, so providers require a consultant (usually an oncologist) to justify and request the scan. The direct-access online-referral route that exists for private MRI generally doesn't exist for PET-CT. This is a safeguard, not a formality.
What is a PET scan used for?
Mostly cancer: staging a new diagnosis to see whether and where it has spread, checking whether treatment is working, and investigating suspected recurrence. The tracer highlights metabolically active tissue, which is what many cancers are. A smaller number of scans address specialist heart, brain and inflammation questions. It is not a screening test for people without symptoms.
Can I get a PET scan privately without a cancer diagnosis?
Rarely, and usually you shouldn't. Reputable providers require a consultant referral answering a defined clinical question, and no UK clinical body recommends PET as a screening scan for well people — it delivers a real radiation dose and frequently lights up benign findings that trigger anxious follow-up. If you want a general check-up, a health MOT or targeted tests are the appropriate products.
How long is the wait for a private PET scan?
Usually days to a couple of weeks — quick, but less instant than private MRI, because scanner sessions are batched around tracer deliveries and there are far fewer PET machines. Insurer authorisation adds a day or two. On the NHS, urgent cancer imaging is prioritised, so the private advantage is measured in days rather than the weeks it can be for routine scans.
What happens during a PET-CT scan?
You fast for about six hours, have the tracer injected, then rest for roughly an hour while it distributes through your body. The scan itself takes 20–30 minutes lying still in a CT-style ring scanner. Allow two to three hours overall. Afterwards you're mildly radioactive for a few hours, so centres advise keeping a distance from pregnant women and young children that day.
How quickly do private PET scan results come back?
The specialist report — written by a nuclear medicine physician or radiologist — typically takes 2–5 working days and goes to your referring consultant, who explains the findings in the context of your treatment plan. Urgent findings are communicated faster. Because PET results usually inform major decisions like surgery or chemotherapy planning, they're discussed at an appointment rather than posted to you cold.
Is a private PET scan covered if I'm on an NHS cancer pathway?
Insurance covers PET within a private claim it has authorised — mixing pathways needs care. Many people use insurance for the whole cancer journey; others stay NHS and self-pay for a specific scan to speed one step up. NHS teams can generally act on good-quality private PET imaging, but talk to your oncologist first: a scan done to the wrong protocol may need repeating.