In Britain there is a National Health Service (NHS) which is paid for by taxes and National Insurance(保险), and in general people do not have to pay for medical treatment. Every person is registered with a doctor in their local area, know as general practitioner or GP. This means that their name is on the GP's list, and they may make an appointment to see the doctor or may call the doctor out to visit them if they are ill. People do sometimes have to pay part of the cost of drugs that the doctor prescribes(开处方). GPs are trained in general medicine but are not specialists in any particular subject. If a patient needs to see a specialist doctor, they must first go to their GP and then the GP will make an appointment(预约) for the patient to see a specialist at a hospital or clinic.
Although everyone in Britain can have free treatment under the National Health Service. It is also possible to have treatment done privately, for which one has to pay; some people have private health insurance to help them pay for private treatment. Under the NHS, people who need to go to hospital may have to wait for a long time on a waiting list for their treatment. If they pay for the treatment, they will probably get it quickly.
Anyone who is very ill can call an ambulance(救护车) and get taken to hospital for free urgent medical treatment. Ambulances are a free service in Britain.