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Identifying and Definitional Attributes
QH 041646 v6
Data Element
Data Element
A condition or complaint either coexisting with the principal diagnosis or arising during the episode of admitted patient care, episode of residential care or attendance at a health care establishment, as represented by a code.
Health services: used for epidemiological research, casemix studies and planning purposes.
Additional diagnosis (ICD-10-AM)
Other diagnosis
Representational Attributes
Permissible Values


A valid 6th edition code from the corporate reference data system (CRDS) ICD-10-AM data set maintained by Statistical Standards and Strategies, Health Statistics Unit.
Supplementary Values


Collection and Usage Attributes
Record each additional diagnosis relevant to the episode of care in accordance with the ICD-10-AM Australian Coding Standards. Generally, external cause, place of occurrence and activity codes will be included in the string of additional diagnosis codes. In some data collections these codes may also be copied into specific fields.

The diagnosis can include a disease, condition, injury, poisoning, sign, symptom, abnormal finding, complaint, or other factor influencing health status.

Additional diagnoses give information on the conditions that are significant in terms of treatment required, investigations needed and resources used during the episode of care. They are used for casemix analyses relating to severity of illness and for correct classification of patients into Australian Refined Diagnosis Related Groups (AR-DRGs).
Must be a valid ICD-10-AM 6th edition code.
ICD-10-AM codes are validated against a number of national and state edits (e.g. age, sex, cannot be PD, rare, comb, CPoA, etc) to improve coding quality.
An additional diagnosis should be recorded and coded where appropriate upon separation of an episode of admitted patient care or the end of an episode of residential care or attendance at a health care establishment. The additional diagnosis is derived from and must be substantiated by clinical documentation.

Queensland Hospital Admitted Patient Data Collection (QHAPDC):
Punctuation is excluded in QHAPDC.
Additional diagnoses should be interpreted as conditions that affect patient management in terms of requiring any of the following:
- Commencement, alteration or adjustment of therapeutic treatment
- Diagnostic procedures
- Increased nursing clinical care and/or monitoring
In accordance with the Australian Coding Standards, certain conditions that do not meet the above criteria may also be recorded as additional diagnoses.
Additional diagnoses are significant for the allocation of Australian Refined Diagnosis Related Groups. The allocation of patient to major problem or complication and co-morbidity Diagnosis Related Groups is made on the basis of the presence of certain specified additional diagnoses.
Additional diagnoses should be recorded when relevant to the patient's episode of care and not restricted by the number of fields on the morbidity form or computer screen.
External cause codes, although not diagnosis of condition codes, should be sequenced together with the additional diagnosis codes so that meaning is given to the data for use in injury surveillance.
Relational Attributes
Related Metadata References

Related Metadata References_IR

  • 1 - 8
ViewRelationshipMetadata Item TypeMetadata Item SubtypeNameIdentifier & VersionApproval Status
SupersedesData ElementData ElementEpisode of care-additional diagnosis code (ICD-10-AM 5th edn)QH 041646 Version 5Superseded
Has been superseded byData ElementData ElementEpisode of care-additional diagnosis code (ICD-10-AM 7th edn)QH 041646 Version 7Superseded
Is used in the derivation ofData ElementData ElementEpisode of admitted patient care-diagnosis related group (AR-DRG v6.0)QH 041587 Version 5Superseded
Is used in the derivation ofData ElementData ElementEpisode of admitted patient care-major diagnostic category (AR-DRG v6.0)QH 041588 Version 5Superseded
Relates toData ElementData ElementDiagnostic code (ICD-10-AM)QH 040100 Version 2Superseded
Relates toData ElementData ElementEpisode of care-morphology of neoplasm code (ICD-10-AM 6th edn)QH 041688 Version 6Superseded
Relates toData ElementData ElementEpisode of care-principal diagnosis code (ICD-10-AM 6th edn)QH 041644 Version 6Superseded
Relates toData ElementData Element ConceptEpisode of careQH 041640 Version 1Current
Implementation in Metadata Sets


  • 1 - 1
ViewMetadata Item TypeMetadata Item SubtypeNameIdentifer & VersionObligationApproval StatusEffective FromEffective To
Information AssetData CollectionQueensland Hospital Admitted Patient Data Collection (QHAPDC)QH 020001 Version 1ConditionalSuperseded01-Jul-200830-Jun-2010
Source and Reference Attributes
Australian Institute of Health and Welfare
METeOR data element: Episode of care-additional diagnosis, code (ICD-10-AM 6th edn), indicator 356587, Health Standard 05/02/2008 https://meteor.aihw.gov.au/content/index.phtml/itemId/356587/meteorItemView/long