The NHS is free to anyone who is ‘ordinarily resident’. Those who are not ordinarily resident in the UK can be charged for using some NHS services.
There are exemptions from NHS charges for specific types of treatment and also specific groups of people. In addition, there are rules to make sure that no one is denied life-saving or urgent treatment (but chargeable patients will still be asked to pay for this treatment).
This is a factsheet about the NHS in England. However, HIV and sexual health testing, treatment and care is available free of charge from the NHS throughout the UK, regardless of immigration status.