NHS number

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NHS numbers are the unique numbers allocated in a shared numbering scheme to registered users of the three public health services in England, Wales and the Isle of Man. It is the key to the identification of patients, especially in delivering safe care across provider organisations, and is required in all new software deployed within these National Health Services (NHS). [1]

Contents

History

"New NHS numbers" were allocated to every newborn from July 1995, [2] generally introduced in 1996, and became mandatory on 1 April 1997. [3] This replaced the previous system founded on wartime identity card numbers, which in England and Wales used letters and digits (e.g. JRDAN 269); Scotland used numbers based on households with individuals further identified within the household (e.g. STUV123:3), and this meant that it was hard to validate a specific number. [2] The numerical part of ID/NHS numbers allocated to people born after the Second World War in England and Wales matched the birth register entry number (i.e. a person whose birth was entry number xy would have an ID/NHS number in the format LLLLxy). Between 1969 and July 1995, the old-style NHS number was used on a baby's birth certificate as the reference number for the certificate.

Issue

A person gets an NHS number at birth or when they first make contact with the NHS by registering with a GP. It comes from a record being made on the Personal Demographics Service, a national patient database. [4] NHS Numbers are re-issued if a patient is adopted or undergoes gender re-assignment.

Format, number ranges, and check characters

The current system uses a ten-digit number in '3 3 4' format with the final digit being an error-detecting checksum. Examples given include 987 654 4321. [5]

Currently issued numbers for England, Wales and the Isle of Man are from 400 000 000 to 499 999 999, and 600 000 000 to 799 999 999. [4] [6] Current numbers in England also include 3xx xxx xxxx. [7] Unavailable number ranges include 320 000 001 to 399 999 999 (allocated to the Northern Irish system [8] ) and 010 100 0000 to 311 299 9999 (used for CHI numbers in Scotland). [9] NHS Digital reserves the numbers 999 000 0000 to 999 999 9999 for test purposes; these numbers are valid but are never going to be issued. [10]

The checksum is calculated by multiplying each of the first nine digits by 11 minus its position. Using the number 943 476 5919 as an example:

Coordination with Scotland and Northern Ireland

Scotland's equivalent is called a CHI number. A similar system is used in Northern Ireland. The three systems use the same format but with non-overlapping number blocks, as above, preventing the issue of the same number by more than one system.

See also

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References

  1. 1 2 Boyd, Andy; Thomas, Richard; Macleod, John (April 2018). "NHS Number and the systems used to manage them: an overview for research users" (PDF). University of Bristol. Retrieved 11 September 2019.
  2. 1 2 Julian M. Jenkins (1996). "Application of Information Technology to Medicine: NHS-wide networking". St. Michael's Hospital, Bristol: Department of Obstetrics & Gynaecology, University of Bristol . Retrieved 11 August 2013.
  3. ↑ "08/2000 - Commissioning Data Sets (CDSs) i) Enhancement to functionality: HRGs and other changes ii) alignment with CMDSs" (PDF). Information Standards Board for Health and Social Care. October 2000. Retrieved 11 August 2013.
  4. 1 2 "NHS Number: Your Unique Patient Identifier Fact Sheet for NHS Staff" (PDF). NHS Connecting for Health. Archived from the original (PDF) on 2 May 2013. Retrieved 27 November 2012.
  5. ↑ "About the NHS number". NHS Digital. Archived from the original on 21 September 2016. Retrieved 9 April 2018.
  6. ↑ "Systems: NHS Number". Health and Social Care Information Centre . Retrieved 8 December 2016.
  7. ↑ "Response to Freedom of Information request on the format of NHS numbers". National Archives. NHS Digital. 17 January 2023. Retrieved 22 May 2024.
  8. ↑ "HEALTH AND CARE NUMBER". www.datadictionary.nhs.uk. Retrieved 28 April 2022.
  9. ↑ "Patient Identification and Demographic Information: Community Health Index (CHI) Number". ISD Scotland . Retrieved 20 June 2021.
  10. ↑ "Synthetic data in live environments". NHS Digital. Retrieved 14 July 2022.
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