Release 4 Code System

Orders and Observations Work Group Maturity Level: 0Trial Use Use Context: Any

This is a code system defined by the FHIR project.


Defining URL:

Permitted data type for observation value.

Committee:Orders and Observations Work Group
OID:2.16.840.1.113883.4.642.4.1332 (for OID based terminology systems)
Source ResourceXML / JSON

This Code system is used in the following value sets:

Permitted data type for observation value.

This code system defines the following codes:

Quantity QuantityA measured amount.
CodeableConcept CodeableConceptA coded concept from a reference terminology and/or text.
string stringA sequence of Unicode characters.
boolean booleantrue or false.
integer integerA signed integer.
Range RangeA set of values bounded by low and high.
Ratio RatioA ratio of two Quantity values - a numerator and a denominator.
SampledData SampledDataA series of measurements taken by a device.
time timeA time during the day, in the format hh:mm:ss.
dateTime dateTimeA date, date-time or partial date (e.g. just year or year + month) as used in human communication.
Period PeriodA time range defined by start and end date/time.


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