Episode of admitted patient care—procedure, code (ACHI 10th edn) NNNNN-NN

Identifying and definitional attributes

Metadata item type:Data Element
Short name:Procedure
METeOR identifier:641379
Registration status:Health, Superseded 12/12/2018
Tasmanian Health, Archived 08/04/2019
Independent Hospital Pricing Authority, Recorded 04/08/2016
ACT Health, Final 09/08/2018

A clinical intervention represented by a code that:

  • is surgical in nature, and/or
  • carries a procedural risk, and/or
  • carries an anaesthetic risk, and/or
  • requires specialised training, and/or
  • requires special facilities or equipment only available in an acute care setting.

This metadata item gives an indication of the extent to which specialised resources, for example, human resources, theatres and equipment, are used. It also provides an estimate of the numbers of surgical operations performed and the extent to which particular procedures are used to resolve medical problems. It is used for classification of episodes of acute care for admitted patients into Australian refined diagnosis related groups.

Data Element Concept:Episode of admitted patient care—procedure

Value domain attributes

Representational attributes

Classification scheme:Australian Classification of Health Interventions (ACHI) 10th edition
Representation class:Code
Data type:String
Maximum character length:8

Data element attributes

Collection and usage attributes

Collection methods:

Record and code all procedures undertaken during the episode of care in accordance with the ACHI (10th edition). Procedures are derived from and must be substantiated by clinical documentation.


The Independent Hospital Pricing Authority advises the National Health Information Standards and Statistics Committee of relevant changes to the ACHI.

Source and reference attributes


Australian Consortium for Classification Development

National Health Information Standards and Statistics Committee

Relational attributes

Related metadata references:

Is used in the formation of Episode of admitted patient care—diagnosis related group, code (AR-DRG v 9.0) ANNA Tasmanian Health, Endorsed 11/01/2018

Has been superseded by Episode of admitted patient care—procedure, code (ACHI 11th edn) NNNNN-NN Health, Standard 12/12/2018, Tasmanian Health, Endorsed 08/04/2019

Supersedes Episode of admitted patient care—procedure, code (ACHI 9th edn) NNNNN-NN Health, Superseded 05/10/2016, Tasmanian Health, Archived 10/07/2017

Implementation in Data Set Specifications:
All attributes +

Admitted patient care NMDS 2017-18 Health, Superseded 25/01/2018

DSS specific attributes +

Admitted patient care NMDS 2018-19 Health, Superseded 12/12/2018
ACT Health, Final 09/08/2018

DSS specific attributes +

Tasmanian Admitted Patient Data Set - 2017 Tasmanian Health, Archived 10/01/2018

DSS specific attributes +

Tasmanian Admitted Patient Data Set - 2018 Tasmanian Health, Archived 12/04/2019

DSS specific attributes +
Implementation in Indicators:Used as numerator
Heavy menstrual bleeding clinical care standard indicators: 8-Hospital rate of hysterectomy per 100 episodes Health, Standard 17/10/2018
Australian Commission on Safety and Quality in Health Care, Candidate 04/09/2018