HL7 Terminology (THO)
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This page is part of the HL7 Terminology (v5.5.0: Release) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

ValueSet: Observation Reference Range Meaning Codes

Official URL: http://terminology.hl7.org/ValueSet/referencerange-meaning Version: 1.0.0
Draft as of 2020-02-24 Maturity Level: 0 Responsible: Health Level Seven International Computable Name: ObservationReferenceRangeMeaningCodes
Other Identifiers: urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#urn:oid:2.16.840.1.113883.4.642.3.397

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

This value set defines a set of codes that can be used to indicate the meaning/use of a reference range for a particular target population.


This value set is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)

Logical Definition (CLD)



Expansion based on codesystem Observation Reference Range Meaning Codes v1.0.0 (CodeSystem)

This value set contains 13 concepts.

1  typehttp://terminology.hl7.org/CodeSystem/referencerange-meaningType

General types of reference range.

2    normalhttp://terminology.hl7.org/CodeSystem/referencerange-meaningNormal Range

Values expected for a normal member of the relevant control population being measured. Typically each results producer such as a laboratory has specific normal ranges and they are usually defined as within two standard deviations from the mean and account for 95.45% of this population.

2    recommendedhttp://terminology.hl7.org/CodeSystem/referencerange-meaningRecommended Range

The range that is recommended by a relevant professional body.

2    treatmenthttp://terminology.hl7.org/CodeSystem/referencerange-meaningTreatment Range

The range at which treatment would/should be considered.

2    therapeutichttp://terminology.hl7.org/CodeSystem/referencerange-meaningTherapeutic Desired Level

The optimal range for best therapeutic outcomes.

3      prehttp://terminology.hl7.org/CodeSystem/referencerange-meaningPre Therapeutic Desired Level

The optimal range for best therapeutic outcomes for a specimen taken immediately before administration.

3      posthttp://terminology.hl7.org/CodeSystem/referencerange-meaningPost Therapeutic Desired Level

The optimal range for best therapeutic outcomes for a specimen taken immediately after administration.

1  endocrinehttp://terminology.hl7.org/CodeSystem/referencerange-meaningEndocrine

Endocrine related states that change the expected value.

2    pre-pubertyhttp://terminology.hl7.org/CodeSystem/referencerange-meaningPre-Puberty

An expected range in an individual prior to puberty.

2    follicularhttp://terminology.hl7.org/CodeSystem/referencerange-meaningFollicular Stage

An expected range in an individual during the follicular stage of the cycle.

2    midcyclehttp://terminology.hl7.org/CodeSystem/referencerange-meaningMidCycle

An expected range in an individual during the midcycle stage of the cycle.

2    lutealhttp://terminology.hl7.org/CodeSystem/referencerange-meaningLuteal

An expected range in an individual during the luteal stage of the cycle.

2    postmenopausalhttp://terminology.hl7.org/CodeSystem/referencerange-meaningPost-Menopause

An expected range in an individual post-menopause.

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


2023-11-14reviseMarc DuteauTSMGAdd standard copyright and contact to internal content; up-476
2020-10-14reviseGrahame GrieveVocabulary WGReset Version after migration to UTG
2020-05-06reviseTed KleinVocabulary WGMigrated to the UTG maintenance environment and publishing tooling.