Diagnostic Imaging Dataset

The Diagnostic Imaging Dataset (DID) is a central collection of detailed information about diagnostic imaging tests carried out on NHS patients, extracted from local Radiology Information Systems (RISs) and submitted monthly.

The DID captures information about referral source and patient type, details of the test (type of test and body site), demographic information such as GP registered practice, patient postcode, ethnicity, gender and date of birth, plus items about waiting times for each diagnostic imaging event, from time of test request through to time of reporting. NHS England collect the dataset at patient level. It is reported here in summary form as Official Statistics.

Monthly updates to the DID are provisional but become finalised approximately 3 months later.  The statistics for 2012-13 to 2024-25 have now been finalised and are no longer provisional.

Data

2025-26 DID commentary and tables
2024-25 DID commentary and tables (annual data finalised 27^th November 2025)
2023-24 DID commentary and tables (annual data finalised 21^st November 2024)
2022-23 DID commentary and tables (annual data finalised 23^rd November 2023)
2021-22 DID commentary and tables (annual data finalised 15^th December 2022)
2020-21 DID commentary and tables (annual data finalised 18^th November 2021)
2019-20 DID commentary and tables (annual data finalised 29^th October 2020)
2018-19 DID commentary and tables (annual data finalised 19th December 2019)
2017-18 DID commentary and tables (annual data finalised 22nd November 2018)
2016-17 DID commentary and tables (annual data finalised 23rd November 2017)
2015-16 DID commentary and tables (annual data finalised 27th October 2016)
2014-15 DID commentary and tables (annual data finalised 29th October 2015)
2013-14 DID commentary and tables (annual data finalised 7th November 2014 with additional annexes added 25th June 2015)
2012-13 DID commentary and tables  (annual data finalised 31st October 2013)

Supporting documents

 Technical Report Version 14 2024-25 (PDF, 467KB)
Annex 1 – DID Exam Lookup Table Modality, version 4.2 – November 25 (XLSX, 467KB)
Annex 2 – DID Data Items V6.1 (PDF, 283KB)
Annex 5 – DID Interventional procedures, version 4 – November 25 (XLSX, 388KB)
Previous Versions of DID Supporting Documents

Pre-release Access List

Pre-release access list (PDF, 172KB)

National Imaging Data Collection

Data on imaging equipment is available from the National Imaging Data Collection (NIDC).
Link to National Imaging Data Collection page.

Contact Us

For further information about the published statistics, please contact us at:

Operational Insights
NHS England
Email: england.did@nhs.net