<status value="active"/><experimental value="true"/><date value="2026-06-23"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="The kind of numeric measurement being recorded for a substance amount or relationship, e.g. IC50, Kd, mole ratio."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/substance-measurement-type"/><content value="complete"/><concept><code value="ic50"/><display value="IC50"/><definition value="Half maximal inhibitory concentration."/></concept><concept><code value="ec50"/><display value="EC50"/><definition value="Half maximal effective concentration."/></concept><concept><code value="kd"/><display value="Kd"/><definition value="Equilibrium dissociation constant."/></concept><concept><code value="ki"/><display value="Ki"/><definition value="Inhibition constant."/></concept><concept><code value="km"/><display value="Km"/><definition value="Michaelis constant."/></concept><concept><code value="kon"/><display value="Kon"/><definition value="Association rate constant."/></concept><concept><code value="koff"/><display value="Koff"/><definition value="Dissociation rate constant."/></concept><concept><code value="mole-ratio"/><display value="Mole ratio"/><definition value="Ratio expressed in moles."/></concept><concept><code value="weight-ratio"/><display value="Weight ratio"/><definition value="Ratio expressed by weight (mass)."/></concept></CodeSystem>

Generated Narrative: CodeSystem substance-measurement-type

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

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