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ICD-10-AM/ACHI/ACS Twelfth Edition

Date published: 15 September 2023

ICD-10-AM/ACHI/ACS Twelfth Edition supersedes ICD-10-AM/ACHI/ACS Eleventh Edition and is applicable for separations from 1 July 2022.

ICD-10-AM/ACHI/ACS is used for classifying admitted patient care and comprises the following:

  • International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Australian Modification (ICD-10-AM) – used to classify diseases, injuries and related health problems
  • Australian Classification of Health Interventions (ACHI) – used to classify surgeries, therapies and health interventions
  • Australian Coding Standards (ACS) – guidelines for nationally consistent application of ICD-10-AM and ACHI.

The ICD-10-AM/ACHI/ACS classification system is used in conjunction with National Coding Advice and the Clinical Coding Practice Framework.

ICD-10-AM/ACHI/ACS Twelfth Edition supersedes ICD-10-AM/ACHI/ACS Eleventh Edition and is applicable for separations from 1 July 2022.

Twelfth Edition has been developed in accordance with the Governance Framework for the Development of the Admitted Care Classifications and the Independent Health and Aged Care Pricing Authority (IHACPA) has sought relevant input from clinicians, jurisdictions and other health sector stakeholders represented on its technical and advisory committees in its development. 

Fact sheets

To support the implementation of ICD-10-AM/ACHI/ACS Twelfth Edition, a number of fact sheets have been developed to assist in the understanding of key updates:

Education on ICD-10-AM/ACHI/ACS Twelfth Edition is available on IHACPA Learn.

There are 18 interactive online modules that cover the key changes for ICD-10-AM/ACHI/ACS Twelfth Edition, as well as an introductory module to guide users on how to engage with the content.

Each module will take between 10 and 30 minutes to complete and are compatible with multiple browsers. While it is useful to have already purchased the classification books for Twelfth Edition, the module content may be completed without access to the classification. 

Modules are self-paced and include knowledge checks and end-of-module quizzes. 

Get started

New users to IHACPA Learn must register their details, and then are able to track their progress of learning. Please note that the login details for IHACPA Learn are not the same as the details for the Australian Classification Exchange (ACE) website.

Users will need to create an account to access the modules and to generate a certificate of completion. To begin, use the following steps:

Please note: Upon registering on the IHACPA Learn website you may be prompted to review the settings of your browser to ensure an optimal experience. Please seek advice from your system administrator if your settings are not compliant with the requirements

ICD-10-AM/ACHI/ACS Twelfth Edition is published as a set of five volumes which contain the following products.


ICD-10-AM Tabular List (Volume 1)

The ICD-10-AM Tabular List contains the disease classification at the three, four and five character levels with a symbol to indicate Australian codes. 

A listing of the three character categories is included.

ICD-10-AM Alphabetic Index (Volume 2)

The ICD-10-AM Alphabetic Index is used to locate diagnostic terms to be coded. The ICD-10-AM Alphabetic Index contains many clinical terms that do not appear in the ICD-10-AM Tabular List.

The ICD-10-AM Alphabetic Index contains three sections:

  • Section I – Alphabetic index of diseases and nature of injury
  • Section II – External causes of injury
  • Section III – Table of drugs and chemicals

ACHI Tabular List (Volume 3)

The ACHI Tabular List contains the interventions classification.

A listing of ACHI block numbers is included.

ACHI Alphabetic Index (Volume 4)

The ACHI Alphabetic Index is used to locate intervention terms to be coded. The ACHI Alphabetic Index contains many clinical terms that do not appear in the ACHI Tabular List.

Australian Coding Standards (Volume 5)

The Australian Coding Standards contain the national standards which that provide guidance in the application of the ICD-10-AM and the ACHI codes.

Two appendices are included:

  • Appendix A – Clinical coders’ creed
  • Appendix B – Guidelines for formulating clinical documentation queries.

To purchase the ICD-10-AM/ACHI/ACS Twelfth Edition volumes, the electronic code lists or mapping tables, please visit the Lane Print website

Please note that the purchase and use of these products are subject to licence arrangements – further information can be found on the Lane Print website. 

ICD-10-AM/ACHI/ACS Chronicle

The Chronicle describes the changes to ICD-10-AM and ACHI codes and the ACS across all editions of ICD-10-AM/ACHI/ACS.

The Chronicle for Twelfth Edition includes: 

Electronic appendices

The ICD-10-AM electronic appendices were previously provided in print format in the ICD-10-AM Tabular List. From Twelfth Edition the list of unacceptable diagnosis codes and the special tabulation lists for mortality and morbidity will be provided in electronic format.

The electronic appendices for Twelfth Edition are available here: ICD-10-AM Twelfth Edition - electronic appendices.

Mapping tables

Information on the various mapping tables available can be found on the IHACPA website ICD-10-AM and ACHI mapping tables.

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