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Episode of admitted patient care—diagnosis onset type, code N

Identifying and definitional attributes

Metadata item type:Help on this termData Element
Short name:Help on this termDiagnosis onset type
METeOR identifier:Help on this term270192
Registration status:Help on this termHealth, Superseded 05/02/2008
Definition:Help on this term

A qualifier for each coded diagnosis to indicate the onset and/or significance of the diagnosis to the episode of care, as represented by a code.

Data Element Concept:Episode of admitted patient care—diagnosis onset type

Value domain attributes

Representational attributes

Representation class:Help on this termCode
Data type:Help on this termNumber
Format:Help on this termN
Maximum character length:Help on this term1
Permissible values:Help on this term
ValueMeaning
1Primary condition
2Post-admit condition
Supplementary values:Help on this term
9Unknown or uncertain

Collection and usage attributes

Guide for use:Help on this term

CODE 1     Primary condition

  • a condition present on admission such as the presenting problem, a comorbidity, chronic disease or disease status. In the case of neonates, the condition(s) present at birth.
  • a previously existing condition not diagnosed until the current episode of care
    in delivered obstetric cases, all conditions which arise from the beginning of labour to the end of second stage

CODE 2     Post-admit condition

  • a condition which arises during the current episode of care and would not have been present on admission

CODE 9     Unknown or uncertain

  • a condition where the documentation does not support assignment to 1 or 2

Data element attributes

Collection and usage attributes

Guide for use:Help on this term

Assign the relevant diagnosis type flag to all of the ICD-10-AM disease codes recorded in the hospital morbidity system. Specific guidelines for correct assignment of diagnosis flag type are in the ICD-10-AM Australian Coding Standards.

The following rules only apply to:

  • diagnoses which meet the criteria in the Australian Coding Standards (ACS) 0001 Principal diagnosis and ACS 0002 Additional diagnoses or a specialty standard which requires the use of an additional code(s).
  • hospital morbidity data.
  • 'episode of care' refers to hospital or day procedure episodes of care.

Explanatory notes:

The flag on external cause, place of occurrence and activity codes should match that of the corresponding injury or disease code.

The flag on morphology codes should match that on the corresponding neoplasm code.

Conditions meeting the criteria of principal diagnosis may, in some cases, have a flag of 2.

Collection methods:Help on this term

A diagnosis onset type should be recorded and coded upon completion of an episode of admitted patient care.

Comments:Help on this term

Improved analysis of diagnostic information, especially in relation to patient safety and adverse event monitoring.

Source and reference attributes

Origin:Help on this termNational Centre for Classification in Health

Relational attributes

Related metadata references:Help on this term

Supersedes Diagnosis onset type, version 1, DE, NHDD, NHIMG, Superseded 01/03/2005.pdf (17.1 KB)

Has been superseded by Episode of admitted patient care—condition onset flag, code N Health, Superseded 07/02/2013, Commonwealth Department of Health, Candidate 16/07/2015

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