TRUD, NHS Classifications ICD-10

NHS Classifications ICD-10

The Clinical Classifications Service is the definitive source of clinical coding guidance and sets the national standards for ICD-10 and OPCS-4 used by the NHS.

Items available to subscribers

A Basic Introduction to Clinical Coding

As part of the Clinical Coding Standards Course, all attendees must complete the Theory and Background and Key Definitions modules before attending the classroom based course.


Basic Anatomy and Physiology eLearning module

Promoting an understanding of diseases and operations described in case notes by providing information on body systems, how they work together, and the terminology used to describe them. This module must be completed prior to attendance on an 18-day Clinical Coding Foundation Course.


ICD-10 4 Step e-Learning Module

This e-learning module is designed to be used as a revision aid before sitting the National Clinical Coding Qualification (UK) examination and for clinical coders who wish to refresh their memory about the four step coding process. At the end of the module you will have the opportunity to test your understanding of the four step coding process.


Legally restricted patient confidential reference data

Important Notice - Information on the withdrawal of Read v2 and CTV3 can be found here


Part of the Legally Restricted patient confidential data change standard ISB 1572 Sensitive Data.

Includes the updated clinical code lists for In Vitro Fertilisation (IVF) and Sexually Transmitted Diseases (STD) across the following terminologies and classifications:

  • SNOMED CT
  • 5-byte Read Codes Version 2
  • Clinical Terms Version 3
  • ICD-10
  • OPCS 4

Status: Technology Preview


ICD-10 5th Edition update presentation

ICD-10 5th Edition update presentation for use by trainers, managers and coders alongside the Key Learning Points and reference book to learn about the changes in the 5th Edition Classification and the coding standards.


National Clinical Coding Standards ICD-10

The electronic version of the National Clinical Coding Standards ICD-10 reference book.


NHS ICD-10 5th Edition data files

A set of release files containing the Codes and Titles and Metadata and specification, Tables of Coding Equivalences and specification (comprising forward and backward maps with/ without code descriptions) and a summary of changes report, to support ICD-10 5th Edition implementation on 1 April 2016. The Information Standards Notice describes the mandate for NHS and NHS supplier implementation.

This subpack is designed for NHS information departments and /or NHS system suppliers to upload into PAS systems and to assist data analysts with the comparison of data collected according to ICD-10 5th Edition with that collected according to the ICD-10 4th Edition. These data files are not designed or intended for training purposes.


NHS ICD-10 5th Edition XML data files

A set of XML release files containing the Codes and Titles and Metadata, Tables of Coding Equivalences (comprising forward and backward maps with/without code descriptions) in XML format to support ICD-10 5th Edition implementation on 1 April 2016. Associated specifications are available at NHS ICD-10 5th Edition data files. The Information Standards Notice describes the mandate for NHS and NHS supplier implementation.

This subpack is designed for NHS information departments and /or NHS system suppliers to upload into PAS systems and to assist data analysts with the comparison of data collected according to ICD-10 5th Edition with that collected according to the ICD-10 4th Edition. These data files are not designed or intended for training purposes.


NHS ICD-10 4th Edition data files

A set of release files containing the Codes and Titles and Metadata and specification, Tables of Coding Equivalences and specification (comprising forward and backward maps with/ without code descriptions) and a summary of changes report, to support ICD-10 4th Edition implementation on 1 April 2012. The Information Standards Notice describes the mandate for NHS and NHS supplier implementation.

This subpack is designed for NHS information departments and /or NHS system suppliers to upload into PAS systems. These data files are not designed or intended for training purposes.


NHS ICD-10 4th Edition XML data files

A set of release files containing the Codes and Titles and Metadata, Tables of Coding Equivalences (comprising forward and backward maps with/without code descriptions) in XML format to support ICD-10 4th Edition implementation on 1 April 2012. Associated specifications are available at NHS ICD-10 4th Edition data files, see above. The Information Standards Notice describes the mandate for NHS and NHS supplier implementation.

This subpack is designed for NHS information departments and /or NHS system suppliers to upload into PAS systems. These data files are not designed or intended for training purposes.


NHS ICD-10 Reprinted (with corrections and updates) 2000

This file contains data equivalent to the icd10met.txt and terms10.txt files (pre-April 2012) in the newer Delimiter Separated Values (DSV) format. Implementations of ICD-10 MUST NOT use this release, it is provided for the purposes of aiding migration between releases. Specifically, analysts working with the ToCE files without descriptions will need.