Australian Classification of Health Interventions (ACHI) 11th edition

Identifying and definitional attributes

Metadata item type:Classification Scheme
Synonymous names:ACHI 11th edn
METeOR identifier:699613
Registration status:Health, Standard 12/12/2018

The Australian classification of health interventions.

Classification structure:

ACHI is comprised of:
• Tabular List of Interventions - contains a seven character code, in the format NNNNN-NN. Generally, the first five characters represent the Medical Benefits Schedule (MBS) item number and the last two characters are allocated for each procedural concept derived from the MBS item description. Two appendices are specified: Mapping table; and ACHI codes listed in numerical order.
• Alphabetic Index of Interventions - an alphabetic index to the ACHI Tabular List of Interventions that contains many more procedural terms than those appearing in the ACHI Tabular List.

Source and reference attributes


Australian Consortium for Classification Development (ACCD) 2018. The Australian Classification of Health Interventions (ACHI) – Eleventh Edition - Tabular list of interventions and Alphabetic index of interventions. Adelaide: IHPA, Lane Publishing.

Revision status:

ACHI was developed by the National Centre for Classification in Health (NCCH) at the University of Sydney. During the development, the NCCH was advised by members of the NCCH Coding Standards Advisory Committee (CSAC) and the Clinical Classification and Coding Groups (CCCG), consisting of expert clinical coders and clinicians nominated by the Clinical Casemix Committee of Australia.

In 2010, the National Casemix and Classification Centre (NCCC) at the University of Wollongong assumed responsibility for ACHI development and maintenance. NCCC developed the 2012 version of ACHI, released for implementation in 2013.

In 2013, the NCCH at the University of Sydney once again assumed responsibility for ACHI development and maintenance, as part of a consortium under the name of the Australian Centre for Classification Development (ACCD). The ACCD comprises the NCCH, the University of Western Sydney and KPMG.

From 1 July 2014, all ICD-10-AM/ACHI/ACS and AR-DRG related products are available for purchase from the Independent Hospital Pricing Authority (IHPA). For further information, contact the IHPA via the following email address:

Relational attributes

Related metadata references:

Supersedes Australian Classification of Health Interventions (ACHI) 10th edition Health, Superseded 12/12/2018, Tasmanian Health, Endorsed 10/07/2017, Independent Hospital Pricing Authority, Recorded 04/08/2016, ACT Health, Final 20/07/2018

Has been superseded by Australian Classification of Health Interventions (ACHI) 12th edition Health, Standardisation pending 20/09/2021

Value Domains based on this classification scheme:

Elective care type code N Health, Candidate 22/02/2021

Procedure code (ACHI 11th edn) NNNNN-NN Health, Standard 12/12/2018