Yes, as Kags said most dentists will remove you as an NHS patient if you haven't attended for NHS treatment within a certain period of time. This happened to me recently. My dental practice's policy was to strike you off as an NHS patient after 15 months of non-attendance. Although I had attended during the past 15 months, it was for private treatement, not NHS, so was not counted (which I didn't realise). Dentists are not obliged to write and tell you you are in danger of being struck off (mine didn't, hence I was caught out). My dentist (in common with all others in my area) aren't taking on any NHS patients at the moment, but is happy to accept me as a private patient (now having to pay �45 for a check up, compared to about �7 on the NHS!).