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Technology – Personal Demographics Service (PDS)

You must use PDS if you're building products and services and need to access or manage patient demographic data.

What is PDS?

The Personal Demographics Service (PDS) is a national database of NHS patient details such as:

  • NHS number
  • name
  • address
  • date of birth
  • related people
  • registered GP

It helps healthcare professionals identify patients and match them to their health records. It also allows them to contact and communicate with patients. It supports information standard ISB 0149 NHS number (on NHS England's website).

When to use PDS

Use PDS when you need to know the NHS number of a patient, and to find and use personal demographic details, for example to contact them.

The PDS FHIR API (NHS England) meets the latest standards. If you want to start using a PDS API, this is the version to use.

If your organisation is already using the older PDS HL7 V3 API (NHS England), it's still supported but is under review and will be retired at some point. The PDS team will contact users before deciding on a retirement date.

When not to use PDS

You cannot use the PDS FHIR API to register a new patient at a GP practice. Use Primary Care Registration Management (NHS England) instead.

Why it's important

The PDS service:

  • provides a consistent service by updating demographic information in one place
  • lets health professionals identify and match patients to their health records and check the accuracy of patient data held locally
  • enables patient information to be shared safely within and across organisational boundaries including for referrals, prescriptions and social care
  • reduces the amount of patient data held locally, which supports the information governance principle of data minimisation, and improves data quality
  • has a range of features to maintain and manage data, saving establishing expensive and resource intensive data management tools locally

Find out more about PDS

We're very interested in hearing what you think about the standards and technology section of the service manual and how it might, or might not, help you develop digital services in health.

Email us or get in touch on the service manual Slack channel.

Updates to this page

Updated: August 2026