None of these is proof of anything on its own. Several together, or any one of them strongly, is a reason to check more carefully before paying.
Credentials you cannot verify
A biography full of impressive-sounding roles, with no GMC number and no specialty you can find on the Specialist Register. “Internationally recognised”, “leading expert” and “pioneer” are not checkable claims. Registration is.
If a website lists qualifications from institutions you have never heard of, that is worth two minutes of searching on its own.
Urgency that comes from the seller
“Only two appointments left this month.” “This price is valid today.” “If you wait, it will be harder to treat.”
Clinical urgency is real and sometimes genuine. Commercial urgency that appears during a sales conversation is a technique. The distinguishing question is whether the urgency is about your condition or about your decision.
Prices that are hard to find
A clinic that will not publish any indication of cost, or quotes a consultation fee but is vague about everything after it, is making it difficult to compare on purpose. What private care costs sets out what a complete answer looks like.
A price that changes once you are in the room is worse.
Cure claims and guarantees
Medicine does not offer guarantees. Advertising that promises a cure, a specific outcome, or results “guaranteed” is making a claim that cannot be substantiated — and claims in UK advertising are supposed to be substantiated.
Language about “detox”, “boosting the immune system” or “resetting” the body is usually a sign of a product rather than a treatment.
Testimonials doing the clinical work
Where the evidence for a treatment consists of anonymous quotations, before-and-after photographs and five-star ratings, the evidence is absent. UK advertising rules restrict testimonials relating to conditions that need medical supervision.
Discouragement from involving your GP
Any reluctance about writing to your GP, or suggestions that your GP need not know, is a serious sign. Your GP holds your record and prescribes most of what you take. A private doctor who wants to operate outside that is creating a risk to you.
Treatment proposed before assessment
An appointment that arrives at a recommendation for an expensive package before anyone has examined you or reviewed your history has sold you something rather than assessed you.
Pressure to buy a bundle
Packages of multiple sessions paid in advance shift the risk onto you. If the treatment turns out not to suit, you have already paid for the rest.
No clear route if something goes wrong
Ask where you would be treated if there were a complication overnight. Many private clinics have no inpatient facility and no out-of-hours cover. That is not disqualifying for a consultation; it matters a great deal for a procedure.
If something has gone wrong
Concerns about a doctor’s conduct go to the General Medical Council. Concerns about a clinic in England go to the Care Quality Commission. Misleading advertising goes to the Advertising Standards Authority. All three take complaints from the public directly.