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Central Health Register Inquiry System (CHRIS) archive: GDPR information


Why and how we process your data in the CHRIS archive, and your rights.

Controller NHS Digital
How we use the information (processing activities)

This data is an archive of a system that preceded the Personal Demographic Service (PDS). It is no longer actively updated and is held within Data Management Services (DMS). It is accessed by National Back Office staff (NBO) for query resolution and manual tracing.

Does this contain sensitive (special category) data such as health information? Yes
Who are recipients of this data?


Is data transferred outside the UK? No
How long the data is kept 30 years minimum
Our lawful basis for holding this data Legal obligation
Your rights
  • Tick Be informed
  • Tick Get access to it
  • Tick Rectify or change it
  • Cross Erase or remove it
  • Tick Restrict or stop processing it
  • Cross Move, copy or transfer it
  • Cross Object to it being processed or used
  • Cross Know if a decision was made by a computer rather than a person
How can you withdraw your consent?

Consent not the basis for processing

Is the data subject to decisions made solely by computers? (automated decision making) No
Where does this data come from? NHS Central Registry, formed from National Registration Records
The legal basis for collecting this data

Legal obligation (Commencement Order) and management of health and social care systems

Where NHS Digital uses this data



The Personal Demographics Service (PDS) is a national authoritative source of patient demographics data for the whole of the NHS.