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Delen is NHS Digital’s specialist collaboration and information sharing platform for our national terminology and classifications standards. You will be able to find detailed content relating to: dm+d, ICD-10, ICD-11, OPCS-4 and SNOMED CT as well as links to useful resources that will help you to make best use of the standards. You will also be able to see collaborations that are taking place and find out about opportunities to collaborate with us on future developments.

We hope you find Delen useful and if you have any comments or suggestions for how we could improve it, please get in touch with us.


Delen came about as a result of responses to the annual survey we ran last year.

We are currently running this year’s survey and would very much welcome your feedback to help us improve the service we deliver to you.

If you can spare a few minutes, please click the button below to complete the survey which closes on 6th March 2017.






Latest News

  • Terminology and Classifications Newsletter: February 2017
    Welcome to the Terminology and Classifications February 2017 Newsletter, which provides updates on forthcoming releases and other news from the Terminology and Classifications Service including articles on: Launch of Delen Annual Survey Updates to "Read to SNOMED CT" Mapping Tables Chemotherapy Regimens List and Associated Chemotherapy Regimens Clinical Coding Standards New subsets in the April 2017 Release National Clinical Coding Qualification (NCCQ) Exam Papers ..and much more!
    Modified by Gavin McIntosh 2 weeks ago
  • New Classifications Query Submission Form
    Classification/Coding Query Submission. A new form is now available for submitting Classification/Coding queries
    Modified by Christian Hyde 2 weeks ago
  • New SNOMED CT UK Drug Extension subsets to support Enhanced Services
    The SNOMED CT UK Drug Extension now includes subsets / refsets created to support the Enhanced Services, Vaccinations and Core Contract Components ..
    Modified by Christian Hyde 2 weeks ago

Go to What's New