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Episode of admitted patient care—procedure, code (ACHI 11th edn) NNNNN-NN

Identifying and definitional attributes

Metadata item type:Help on this termData Element
Short name:Help on this termProcedure
METEOR identifier:Help on this term699716
Registration status:Help on this term
  • Health, Superseded 20/10/2021
  • Tasmanian Health, Standard 08/04/2019
Definition:Help on this term

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.
Context:Help on this term

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) 11th edition
Representation class:Help on this termCode
Data type:Help on this termString
Format:Help on this termNNNNN-NN
Maximum character length:Help on this term8

Data element attributes

Collection and usage attributes

Collection methods:Help on this term

Record and code all procedures undertaken during the episode of care in accordance with the ACHI (11th edition). Procedures are derived from and must be substantiated by clinical documentation.

Comments:Help on this term

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

Source and reference attributes

Submitting organisation:Help on this term

Independent Hospital Pricing Authority

Origin:Help on this term

Australian Consortium for Classification Development

National Health Information Standards and Statistics Committee

Relational attributes

Related metadata references:Help on this term
Is used in the formation of Episode of admitted patient care—diagnosis related group, code (AR-DRG v 10.0) ANNA
  • Tasmanian Health, Standard 19/06/2020
Has been superseded by Episode of admitted patient care—intervention, code (ACHI 12th edn) NNNNN-NN
  • Health, Standard 20/10/2021
Supersedes Episode of admitted patient care—procedure, code (ACHI 10th edn) NNNNN-NN
  • ACT Health (retired), Candidate 09/08/2018
  • Health, Superseded 12/12/2018
  • Independent Hospital Pricing Authority, Candidate 04/08/2016
  • Tasmanian Health, Superseded 08/04/2019
Implementation in Data Set Specifications:Help on this term
All attributes +

Admitted patient care clinical related data elements (TDLU) clusterTasmanian Health, Standard 18/05/2021

Admitted patient care NMDS 2019-20Health, Superseded 18/12/2019

DSS specific attributes +

Implementation start date: 01/07/2019

Implementation end date: 30/06/2020

DSS specific information:

As a minimum requirement procedure codes must be valid codes from the Australian Classification of Health Interventions (ACHI) procedure codes and validated against the nationally agreed age and sex edits. More extensive edit checking of codes may be utilised within individual hospitals and state and territory information systems.

An unlimited number of diagnosis and procedure codes should be able to be collected in hospital morbidity systems. Where this is not possible, a minimum of 20 codes should be able to be collected.

Record all procedures undertaken during an episode of care in accordance with the ACHI (11th edition) Australian Coding Standards.

The order of codes should be determined using the following hierarchy:

  • procedure performed for treatment of the principal diagnosis
  • procedure performed for the treatment of an additional diagnosis
  • diagnostic/exploratory procedure related to the principal diagnosis
  • diagnostic/exploratory procedure related to an additional diagnosis for the episode of care.

Admitted patient care NMDS 2020–21Health, Superseded 05/02/2021

DSS specific attributes +

Implementation start date: 01/07/2020

Implementation end date: 30/06/2021

DSS specific information:

As a minimum requirement procedure codes must be valid codes from the Australian Classification of Health Interventions (ACHI) procedure codes and validated against the nationally agreed age and sex edits. More extensive edit checking of codes may be utilised within individual hospitals and state and territory information systems.

An unlimited number of diagnosis and procedure codes should be able to be collected in hospital morbidity systems. Where this is not possible, a minimum of 20 codes should be able to be collected.

Record all procedures undertaken during an episode of care in accordance with the ACHI (11th edition) Australian Coding Standards.

The order of codes should be determined using the following hierarchy:

  • procedure performed for treatment of the principal diagnosis
  • procedure performed for the treatment of an additional diagnosis
  • diagnostic/exploratory procedure related to the principal diagnosis
  • diagnostic/exploratory procedure related to an additional diagnosis for the episode of care.

Admitted patient care NMDS 2021–22Health, Superseded 20/10/2021

DSS specific attributes +

Implementation start date: 01/07/2021

Implementation end date: 30/06/2022

DSS specific information:

As a minimum requirement procedure codes must be valid codes from the Australian Classification of Health Interventions (ACHI) procedure codes and validated against the nationally agreed age and sex edits. More extensive edit checking of codes may be utilised within individual hospitals and state and territory information systems.

An unlimited number of diagnosis and procedure codes should be able to be collected in hospital morbidity systems. Where this is not possible, a minimum of 20 codes should be able to be collected.

Record all procedures undertaken during an episode of care in accordance with the ACHI (11th edition) Australian Coding Standards.

The order of codes should be determined using the following hierarchy:

  • procedure performed for treatment of the principal diagnosis
  • procedure performed for the treatment of an additional diagnosis
  • diagnostic/exploratory procedure related to the principal diagnosis
  • diagnostic/exploratory procedure related to an additional diagnosis for the episode of care.

Tasmanian Admitted Patient Data Set - 2019Tasmanian Health, Superseded 17/06/2020

DSS specific attributes +

Implementation start date: 01/07/2019

Implementation end date: 30/06/2020


Tasmanian Admitted Patient Data Set - 2020Tasmanian Health, Standard 10/07/2020

DSS specific attributes +

Implementation start date: 01/07/2020

Implementation end date: 30/06/2021


Implementation in Indicators:Help on this term
Used as Numerator

National Healthcare Agreement: PB f–By 2014–15, improve the provision of primary care and reduce the proportion of potentially preventable hospital admissions by 7.6 per cent over the 2006-07 baseline to 8.5 per cent of total hospital admissions, 2022Health, Standard 24/09/2021

National Healthcare Agreement: PI 18–Selected potentially preventable hospitalisations, 2022Health, Standard 24/09/2021

National Healthcare Agreement: PI 23–Unplanned hospital readmission rates, 2022Health, Standard 24/09/2021

Used as Denomirator

National Healthcare Agreement: PI 23–Unplanned hospital readmission rates, 2022Health, Standard 24/09/2021

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