Release 5 Draft Ballot

This is the Continuous Integration Build of FHIR (will be incorrect/inconsistent at times).
See the Directory of published versions Code System

Orders and Observations Work Group Maturity Level: NNormative (from v4.0.0) Use Context: Any
This page has been approved as part of an ANSI standard. See the Observation Package for further details.

This is a code system defined by the FHIR project.


Defining URL:

Codes providing the triggeredBy type of observation.

Committee:Orders and Observations Work Group
OID:2.16.840.1.113883.4.642.1.0 (for OID based terminology systems)
Source ResourceXML / JSON

This Code system is used in the following value sets:

  • ValueSet: triggeredBytype (Codes providing the type of triggeredBy observation.)

This code system defines the following codes:

reflex ReflexPerformance of one or more other tests depending on the results of the initial test. This may include collection of additional specimen. While a new ServiceRequest is not required to perform the additional test, where it is still needed (e.g., requesting another laboratory to perform the reflex test), the Observation.basedOn would reference the new ServiceRequest that requested the additional test to be performed as well as the original ServiceRequest to reflect the one that provided the authorization.
repeat Repeat (per policy)Performance of the same test again with the same parameters/settings/solution.
re-run Re-run (per policy)Performance of the same test but with different parameters/settings/solution.


See the full registry of code systems 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. See Code System for further information.
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