AIHW Board AIHW senior staff Annual report Capability statement Collaboration Customer care charter FOI - freedom of information Indexed list of files Organisation chart Presentations Privacy of data Public consultation Public Interest Disclosure Strategic Directions 2011-2014 Tenders
By category Ageing, disability & carers Families & children Hospitals Housing & homelessness Indigenous Australians Population groups Risk factors, diseases & death Services, workforce & spending
By subject Adoptions Aged care Ageing Alcohol & other drugs Arthritis & musculoskeletal conditions Asthma Australia's health Australia's welfare Burden of disease Cancer Cardiovascular health Child health, development & wellbeing Child protection Children's services Chronic diseases
Chronic kidney disease Chronic respiratory conditions COPD Deaths Dementia Dental & oral health Diabetes Disability Expenditure Eye health Food & nutrition Health indicators Homelessness Hospitals Housing assistance Indigenous Australians Injury Life expectancy
Male health Mental health Mothers & babies National health priority areas Overweight & obesity Palliative care Population health Prisoner health Risk factors Rural health Safety & quality of health care Veterans' health Workforce Youth health & wellbeing Youth justice
In other sections Data Publications Contact AIHW
Publications CatalogueOrdering publicationsForthcoming publicationsOnline reportsRate our publication effectivenessSubscribe to release notices
By subject Adoptions Aged care Ageing Alcohol & other drugs Arthritis & musculoskeletal conditions Asthma Australia's health Australia's welfare Burden of disease Cancer Cardiovascular health Child health, development & wellbeing Child protection Children's services Chronic diseases Chronic kidney disease
Chronic respiratory conditions Corporate publications Data linkage Data standards Deaths Dental & oral health Diabetes Disability Expenditure Eye health Food & nutrition General practice Health indicators Homelessness Hospitals Housing assistance Indigenous Australians Indigenous housing
Injury Life expectancy Male health Mental health services Mothers & babies National health priority areas Overweight & obesity Palliative care Population health Prisoner health Risk factors Rural health Safety & quality of health care Veterans' health Workforce Youth health & wellbeing Youth justice
In other sections Subjects Data Contact AIHW
About AIHW data METeOR—metadata online registry Data by subject Catalogue of holdings of AIHW data Customised data analysis request Data governance framework Data linking Data standards GovHack Privacy of data Accessing Australian Government health and welfare data
By subject Adoptions Aged care Alcohol and other drugs Alcohol data sources Body weight data sources Cancer Children's headline indicators (CHI) Chronic disease indicators Data sources for monitoring health conditionsDeaths Disability
Expenditure FHBH - Fixing houses for better health General practice (GP) data Height and weight data sources Hospitals Indigenous Australians International collaboration Maternity Information Matrix (MIM) Medical indemnity
Mental health National Aged Care Data Clearinghouse National core maternity indicators (NCMI) National indicator catalogue Perinatal data Risk factors statistics Specialist Homelessness Services (SHS) Tobacco data sources Workforce
In other sections Subjects Publications Contact AIHW
AACR ACFADD AHSAC AIHW Board AIHW Ethics Committee AODTS NMDS WG CKDMAC CMAG CSDWG CVDMAC HEAC HHIMG
IGIHM JJ RIG MHISSC NAGATSIHID NCIAG NCSIMG NDDWG NDIMG NHISSC NIAG NIRAPIMG NMDD
NMDS NMHPSC NOPSAD NPDDC NPHEP NPHIC PCDWG PDWG PHIDG PHIG REDWG Workforce committees YIAG
Education worksheets Infographics What's in the pipeline Subscribe to education notices Other educational links
Worksheets by subject All Latest Ageing Australia's health Australia's welfare Carers
Children & youth Disability Disease Drugs
Health Health prevention Indigenous Australians Injury
In other sections Subjects Data Publications Contact AIHW
Job vacancies How to apply for a position at the AIHW Conditions of employment Benefits of working for the AIHW Temporary employment register Occupational Training Program Contact the People Unit Graduates
AIHW Access magazine Media releases Subscribe to release notices Media FAQ Media contacts
You are here:
On this page
The source of these data is the AIHW National Hospital Morbidity Database. Other data on the principal diagnoses and AR-DRGs of hospitalised patients is available in the Australian hospital statistics reports. Some data have been revised since previously published. For confidentiality, some data have been suppressed.
Australian Refined Diagnosis Related Groups (AR-DRGs) is an Australian admitted patient classification system which provides a clinically meaningful way of relating the number and type of patients treated in a hospital (that is, its casemix) to the resources required by the hospital. Each AR-DRG represents a class of patients with similar clinical conditions requiring similar hospital services. The classification categorises acute admitted patient episodes of care into groups with similar conditions and similar usage of hospital resources, using information in the hospital morbidity record such as the diagnoses, procedures and demographic characteristics of the patient.
The AR-DRG data cubes contain separations for which the care type was specifically reported as Acute, Newborn (for separations with at least one qualified day) or was not reported (see the Glossary). Where identifiable, other separation care types have been excluded.
Five data cubes are available on the AR-DRG of the patient. These contain information for:
Data cubes will open in a new window.
The use of the different editions in the five data cubes means that data across years may not be exactly comparable.
The variables in the data cube are:
The measures (values) in the data cube are:
Within the cubes, users can view the AR-DRG by using a pull-down menu and can work down from the Major Diagnostic Category (MDC) level to the surgical/medical/other partition of the MDC to the individual DRGs, as outlined below.
Users of the data cube are likely to require some familiarity with AR-DRGs and have access to the definitions manual. This data access system does not allow searching on key words for AR-DRG. Users will generally need to know what MDC the information they are looking for is in, to work down to more specific levels of detail.
The AR-DRG classification is separated into 23 Major Diagnostic Categories (MDCs) and further categorised into medical, surgical and other groupings. AR-DRG assignment is also influenced by procedures, medical conditions and other factors that differentiate processes of care.
For further information regarding AR-DRG's refer to the Department of Health website.
The AR-DRG classification is regularly updated to align with continual changes to medical or surgical practices and techniques, which are reflected in changes in the ICD-10-AM and ACHI coding systems. Table 1 shows the relevant ICD-10-AM editions and AR-DRG versions from 1998–99 to 2011–12. AR–DRG Classification, version 6.0x, used for the 2011–12 year, was released in 2010.
For further information regarding ICD-10-AM and ACHI classification systems refer to the National Centre for Classification in Health (NCCH) at http://www.accd.net.au/.
AR-DRG logic and definition changes may require the mapping of ICD-10-AM diagnosis and ACHI procedure codes between editions. 'Mapping' refers to the process of finding an 'equivalent' code between two editions (or classifications for the 1998–99 year) to enable data users to interpret data partly classified in one edition/classification and partly classified in another. This means that the data will not be completely comparable between years. Caution should therefore be exercised in comparing data between years.
In order to maintain confidentiality some data have been suppressed at the Diagnosis Related Group level if:
Data for the suppressed categories will not appear in the data cubes, but will be included in the surgical/medical/other partition, MDC, and grand totals. Thus, the sum of separation counts presented within a surgical/medical/other partition or MDC may not match the total.