:This article primarily explains the<unk>  doctor grade within the United Kingdom until 1996 A<unk>  was a grade of doctor in the United Kingdom or Ireland before being superseded during reforms in the 1990s. The<unk>  post still exists in Australia, whilst in the US, the title of<unk> ” might be applied to a Senior or Chief Resident in Surgery.
Senior registrar
Specialty registrar
Specialist registrar
Clinical officer
Senior house officer
Chief medical officer
Clinical investigator
Junior doctor