FHIR Release 3 (STU)

This page is part of the FHIR Specification (v3.0.2: STU 3). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R3 R2 Value Set http://hl7.org/fhir/ValueSet/observation-valueabsentreason

Orders and Observations Work Group Maturity Level: 5InformativeUse Context: Not Intended for Production use

This is a value set defined by the FHIR project.


Defining URL:http://hl7.org/fhir/ValueSet/observation-valueabsentreason
Name:Observation Value Absent Reason
Definition:This value set defines the set of codes for identifying the reason why the expected result in Observation.value[x] is missing.
Committee:Orders and Observations Work Group
OID:2.16.840.1.113883.4.642.3.391 (for OID based terminology systems)
Source ResourceXML / JSON

This value set is used in the following places:

This value set includes codes from the following code systems:


This expansion generated 19 Apr 2017

This value set contains 10 concepts

Expansion based on http://hl7.org/fhir/data-absent-reason version 3.0.2

All codes from system http://hl7.org/fhir/data-absent-reason

unknownUnknownThe value is not known.
askedAskedThe source human does not know the value.
tempTempThere is reason to expect (from the workflow) that the value may become known.
not-askedNot AskedThe workflow didn't lead to this value being known.
maskedMaskedThe information is not available due to security, privacy or related reasons.
unsupportedUnsupportedThe source system wasn't capable of supporting this element.
astextAs TextThe content of the data is represented in the resource narrative.
errorErrorSome system or workflow process error means that the information is not available.
  NaNNot a NumberNaN, standing for not a number, is a numeric data type value representing an undefined or unrepresentable value.
not-performedNot PerformedThe value is not available because the observation procedure (test, etc.) was not performed.


See the full registry of value sets defined as part of FHIR.

Explanation of the columns that may appear on this page:

LevelA few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code