HL7 Terminology
1.0.0 - Publication

This page is part of the HL7 Terminology (v1.0.0: Release) based on FHIR R4. The current version which supercedes this version is 2.1.0. For a full list of available versions, see the Directory of published versions



Defining URL:http://terminology.hl7.org/CodeSystem/special-values
Content:All the concepts defined by the code system are included in the code system resource

A set of generally useful codes defined so they can be included in value sets.

Committee:FHIR Infrastructure
OID:2.16.840.1.113883.4.642.1.1049 (for OID based terminology systems)
Content Mode:Complete
Value Set:http://terminology.hl7.org/ValueSet/special-values ( is the value set for all codes in this code system)
Source Resource:XML / JSON / Turtle

This Code system is referenced in the content logical definition of the following value sets:


A set of generally useful codes defined so they can be included in value sets.

This code system http://terminology.hl7.org/CodeSystem/special-values defines the following codes:

true trueBoolean true.
false falseBoolean false.
trace Trace Amount DetectedThe content is greater than zero, but too small to be quantified.
sufficient Sufficient QuantityThe 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.used in formulations (e.g. 'Add 10mg of ingredient X, 50mg of ingredient Y, and sufficient quantity of water to 100mL.' This code would be used to express the quantity of water. )
withdrawn Value WithdrawnThe value is no longer available.
nil-known Nil KnownThe are no known applicable values in this context.The existence of this subject to review


2020-05-06reviseVocabulary WGTed KleinMigrated to the UTG maintenance environment and publishing tooling.