HL7 Terminology (THO)
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HL7 Terminology (THO), published by HL7 International - Vocabulary Work Group. This guide is not an authorized publication; it is the continuous build for version 6.0.2 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/UTG/ and changes regularly. See the Directory of published versions

ValueSet: NullFlavor

Official URL: http://terminology.hl7.org/ValueSet/v3-NullFlavor Version: 3.0.0
Active as of 2014-03-26 Responsible: Health Level Seven International Computable Name: NullFlavor
Other Identifiers: OID:2.16.840.1.113883.1.11.10609

Copyright/Legal: This material derives from the HL7 Terminology THO. THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html

No description

References

Logical Definition (CLD)

Generated Narrative: ValueSet v3-NullFlavor

Language: en

 

Expansion

Generated Narrative: ValueSet

Language: en

Expansion based on codesystem NullFlavor v3.0.0 (CodeSystem)

This value set contains 17 concepts

CodeSystemDisplayInactiveDefinition
  NIhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorNoInformation

**Description:**The value is exceptional (missing, omitted, incomplete, improper). No information as to the reason for being an exceptional value is provided. This is the most general exceptional value. It is also the default exceptional value.

  INVhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorinvalid

**Description:**The value as represented in the instance is not a member of the set of permitted data values in the constrained value domain of a variable.

  DERhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorderived

**Description:**An actual value may exist, but it must be derived from the provided information (usually an EXPR generic data type extension will be used to convey the derivation expressionexpression .

  OTHhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorother

**Description:**The actual value is not a member of the set of permitted data values in the constrained value domain of a variable. (e.g., concept not provided by required code system).

Usage Notes: This flavor and its specializations are most commonly used with the CD datatype and its flavors. However, it may apply to *any* datatype where the constraints of the type are tighter than can be conveyed. For example, a PQ that is for a true measured amount whose units are not supported in UCUM, a need to convey a REAL when the type has been constrained to INT, etc.

With coded datatypes, this null flavor may only be used if the vocabulary binding has a coding strength of CNE. By definition, all local codes and original text are part of the value set if the coding strength is CWE.

  NINFhttp://terminology.hl7.org/CodeSystem/v3-NullFlavornegative infinity

Negative infinity of numbers.

  PINFhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorpositive infinity

Positive infinity of numbers.

  UNChttp://terminology.hl7.org/CodeSystem/v3-NullFlavorun-encoded

Description: The actual value has not yet been encoded within the approved value domain.

Example: Original text or a local code has been specified but translation or encoding to the approved value set has not yet occurred due to limitations of the sending system. Original text has been captured for a PQ, but not attempt has been made to split the value and unit or to encode the unit in UCUM.

Usage Notes: If it is known that it is not possible to encode the concept, OTH should be used instead. However, use of UNC does not necessarily guarantee the concept will be encodable, only that encoding has not been attempted.

Data type properties such as original text and translations may be present when this null flavor is included.

  MSKhttp://terminology.hl7.org/CodeSystem/v3-NullFlavormasked

There is information on this item available but it has not been provided by the sender due to security, privacy or other reasons. There may be an alternate mechanism for gaining access to this information.

Note: using this null flavor does provide information that may be a breach of confidentiality, even though no detail data is provided. Its primary purpose is for those circumstances where it is necessary to inform the receiver that the information does exist without providing any detail.

  NAhttp://terminology.hl7.org/CodeSystem/v3-NullFlavornot applicable

Known to have no proper value (e.g., last menstrual period for a male).

  UNKhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorunknown

**Description:**A proper value is applicable, but not known.

Usage Notes: This means the actual value is not known. If the only thing that is unknown is how to properly express the value in the necessary constraints (value set, datatype, etc.), then the OTH or UNC flavor should be used. No properties should be included for a datatype with this property unless:

  1. Those properties themselves directly translate to a semantic of "unknown". (E.g. a local code sent as a translation that conveys 'unknown')
  2. Those properties further qualify the nature of what is unknown. (E.g. specifying a use code of "H" and a URL prefix of "tel:" to convey that it is the home phone number that is unknown.)
  ASKUhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorasked but unknown

Information was sought but not found (e.g., patient was asked but didn't know)

  NAVhttp://terminology.hl7.org/CodeSystem/v3-NullFlavortemporarily unavailable

Information is not available at this time but it is expected that it will be available later.

  NASKhttp://terminology.hl7.org/CodeSystem/v3-NullFlavornot asked

This information has not been sought (e.g., patient was not asked)

  NAVUhttp://terminology.hl7.org/CodeSystem/v3-NullFlavorNot available

Information is not available at this time (with no expectation regarding whether it will or will not be available in the future).

  QShttp://terminology.hl7.org/CodeSystem/v3-NullFlavorSufficient Quantity

**Description:**The specific quantity is not known, but is known to be non-zero and is not specified because it makes up the bulk of the material. e.g. 'Add 10mg of ingredient X, 50mg of ingredient Y, and sufficient quantity of water to 100mL.' The null flavor would be used to express the quantity of water.

  TRChttp://terminology.hl7.org/CodeSystem/v3-NullFlavortrace

The content is greater than zero, but too small to be quantified.

  NPhttp://terminology.hl7.org/CodeSystem/v3-NullFlavornot presentinactive

Value is not present in a message. This is only defined in messages, never in application data! All values not present in the message must be replaced by the applicable default, or no-information (NI) as the default of all defaults.


Explanation of the columns that may appear on this page:

Level A 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
System 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)
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

History

DateActionCustodianAuthorComment
2023-11-14reviseTSMGMarc DuteauAdd standard copyright and contact to internal content; up-476
2022-10-18reviseTSMGMarc DuteauFixing missing metadata; up-349
2020-05-06reviseVocabulary WGTed KleinMigrated to the UTG maintenance environment and publishing tooling.
2014-03-26revise2014T1_2014-03-26_001283 (RIM release ID)Vocabulary (Woody Beeler) (no record of original request)Lock all vaue sets untouched since 2014-03-26 to trackingId 2014T1_2014_03_26