The December 1997 Caldicott  Report on the review of patient identifiable information identified weaknesses in the way parts of the NHS handled confidential patient-identifiable data.

Patient identifiable information can include:

  • NHS Number 
  • Casenote number 
  • Name
  • Address 
  • Postcode 
  • Date of birth 
  • Other dates: e.g. death, diagnosis 
  • Sex
  • Ethnic group 
  • Diagnosis or treatment

One of the report's recommendations was the appointment of Caldicott Guardians, members of staff in the NHS with a responsibility to ensure patient-identifiable data is kept secure and used in accordance with the principles in the information below (these principles apply in addition to the requirements of the Data Protection Act 2018 & GDPR).

Patient identifiable information

Justify the purpose

Every proposed use or transfer of patient-identifiable information within or from an organisation should be clearly defined and scrutinised with continuing uses regularly reviewed by an appropriate guardian.