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4.3.2.132 CodeSystem http://hl7.org/fhir/substance-measurement-type

Responsible Owner: Biomedical Research and Regulation icon Work Group Informative Use Context: Country: World, Not Intended for Production use
Official URL: http://hl7.org/fhir/substance-measurement-type Version: 6.0.0-ballot4
active as of 2026-06-23 Computable Name: SubstanceMeasurementTypeExample
Flags: Experimental, CaseSensitive, Complete. All codes ValueSet: Substance Measurement Type OID: TBD

This Code system is used in the following FHIR core-defined or referenced value sets:

  • ValueSet: Substance Measurement Type (The kind of numeric measurement being recorded for a substance amount or relationship, e.g. IC50, Kd, mole ratio.)
  • ValueSet: Substance Measurement Type (The kind of numeric measurement being recorded for a substance amount or relationship, e.g. IC50, Kd, mole ratio.)

4.3.2.132.1 Definition

The kind of numeric measurement being recorded for a substance amount or relationship, e.g. IC50, Kd, mole ratio.

4.3.2.132.2 Content

Generated Narrative: CodeSystem substance-measurement-type

Last updated: 2026-06-23T16:20:19.822Z

This case-sensitive code system http://hl7.org/fhir/substance-measurement-type defines the following codes:

CodeDisplayDefinitionCopy
ic50 IC50 Half maximal inhibitory concentration. btn btn
ec50 EC50 Half maximal effective concentration. btn btn
kd Kd Equilibrium dissociation constant. btn btn
ki Ki Inhibition constant. btn btn
km Km Michaelis constant. btn btn
kon Kon Association rate constant. btn btn
koff Koff Dissociation rate constant. btn btn
mole-ratio Mole ratio Ratio expressed in moles. btn btn
weight-ratio Weight ratio Ratio expressed by weight (mass). btn btn

 

See the full registry of code systems defined as part of FHIR.

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. See Code System for further information.
Source 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). If the code is in italics, this indicates that the code is not selectable ('Abstract')
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