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An

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texpression
is a structured combination of one or more
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tconcept identifiers
used to express an instance of a clinical idea.

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    _b9b782a2-d098-4c93-87f7-726efee127c1__c
    _b9b782a2-d098-4c93-87f7-726efee127c1__c
    Gloss
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    tprecoordinated expression
    : An
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    texpression
    containing a single
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    tconcept identifier
    is
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    tprecoordinated
    . The clinical idea it expresses is represented by the identified
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    tconcept
    . The defining
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    trelationships
    of that
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    tconcept
    precoordinate its meaning.
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    tpostcoordinated expression
    :
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    texpression
    that contains two or more
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    tconcept identifiers
    is
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    tpostcoordinated
    . The
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    tconcept identifiers
    in a
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    tpostcoordinated expression
    are related to one another in ways that build a more specific clinical idea. The required meaning is expressed by postcoordinating several clinical ideas each of which is represented by an identified
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    tconcept
    .

Example: A

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tpostcoordinated expression
can indicate the specific site of a finding even when that specific combination of disorder and site is not represented by a single
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tSNOMED CT Concept
.

Related Links

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    tExpression