ICD-10-AM is the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Australian Modification. It consists of a tabular list of diseases and accompanying index.

ICD-10-AM has been in use since 1998. It was developed with assistance from clinicians and clinical coders to ensure that the classification is current and appropriate for Australian clinical practice. ICD-10-AM is a derived version of the World Health Organization (WHO) ICD-10. It uses an alphanumeric coding scheme for diseases and external causes of injury. It is structured by body system and aetiology, and comprises three, four and five character categories. ICD-10-AM is updated on a regular basis, with the regular updates of ICD-10 being included as part of the updating process.


The Australian Classification of Health Interventions has also been in use since 1998. ACHI was based on the Medicare Benefits Schedule (MBS) and was previously known as the Medicare Benefits Schedule-Extended (MBS-E). ACHI was also developed with assistance from specialist clinicians and clinical coders.

ACHI codes have seven digits. The first five digits are the MBS item number where one exists. The two-digit extension represents specific interventions included in that item. The classification is structured by body system, site and intervention type. Interventions not currently listed in MBS have also been included (e.g. dental, allied health interventions, cosmetic surgery). ACHI consists of a tabular list of interventions and accompanying alphabetic index.


The Australian Coding Standards have been developed with the objective of satisfying sound coding conventions for use with ICD-10-AM and ACHI. They apply to all public and private hospitals in Australia. The ongoing revision of the Australian Coding Standards ensures that they reflect changes in clinical practice, clinical classification amendments and various user requirements of admitted patient data collections.


ICD-10-AM/ACHI/ACS is supplied in hardcopy format as a five book set. Electronic versions are available from various providers. With each edition, the following are also produced:

  • Mapping tables between the new edition and previous edition of ICD-10-AM and ACHI.
  • ICD-10-AM/ACHI/ACS Chronicle of Changes - a reference tool that documents changes between editions.