This page is part of the FHIR Specification (v5.0.0: R5 - STU). This is the current published version in it's permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions 
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FHIR Infrastructure   Work Group | Maturity Level: N | Normative (from v4.0.0) | Use Context: Country: World | 
      Official URL: http://hl7.org/fhir/ValueSet/data-absent-reason
     | 
    Version: 5.0.0 | |||
| active as of 2022-12-13 | Computable Name: DataAbsentReason | |||
| Flags: Immutable | OID: 2.16.840.1.113883.4.642.3.5 | |||
This value set is used in the following places:
 Used to specify why the normally expected content of the data element is missing.
http://terminology.hl7.org/CodeSystem/data-absent-reason 
This expansion generated 26 Mar 2023
This value set contains 15 concepts
Expansion based on DataAbsentReason v0.1.0 (CodeSystem) 
| Level | Code | System | Display | Definition | 
| 1 |   unknown ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Unknown | The value is expected to exist but is not known.  | 
| 2 |     asked-unknown ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Asked But Unknown | The source was asked but does not know the value.  | 
| 2 |     temp-unknown ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Temporarily Unknown | There is reason to expect (from the workflow) that the value may become known.  | 
| 2 |     not-asked ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Not Asked | The workflow didn't lead to this value being known.  | 
| 2 |     asked-declined ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Asked But Declined | The source was asked but declined to answer.  | 
| 1 |   masked ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Masked | The information is not available due to security, privacy or related reasons.  | 
| 1 |   not-applicable ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Not Applicable | There is no proper value for this element (e.g. last menstrual period for a male).  | 
| 1 |   unsupported ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Unsupported | The source system wasn't capable of supporting this element.  | 
| 1 |   as-text ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | As Text | The content of the data is represented in the resource narrative.  | 
| 1 |   error ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Error | Some system or workflow process error means that the information is not available.  | 
| 2 |     not-a-number ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Not a Number (NaN) | The numeric value is undefined or unrepresentable due to a floating point processing error.  | 
| 2 |     negative-infinity ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Negative Infinity (NINF) | The numeric value is excessively low and unrepresentable due to a floating point processing error.  | 
| 2 |     positive-infinity ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Positive Infinity (PINF) | The numeric value is excessively high and unrepresentable due to a floating point processing error.  | 
| 1 |   not-performed ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Not Performed | The value is not available because the observation procedure (test, etc.) was not performed.  | 
| 1 |   not-permitted ![]()  | http://terminology.hl7.org/CodeSystem/data-absent-reason | Not Permitted | The value is not permitted in this context (e.g. due to profiles, or the base data types).  | 
See the full registry of value sets defined as part of FHIR.
Explanation of the columns that may appear on this page:
| Lvl | A few code lists that FHIR defines are hierarchical - each code is assigned a level. For value sets, levels are mostly used to organize codes for user convenience, but may follow code system hierarchy - see Code System for further information | 
| Source | The source of the definition of the code (when the value set draws in codes defined elsewhere) | 
| Code | The code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract') | 
| Display | The 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 | 
| Definition | An explanation of the meaning of the concept | 
| Comments | Additional notes about how to use the code |