{"caseSensitive":true,"concept":[{"code":"missing","definition":"The search parameter returns resources that have a value or not.","display":"Missing"},{"code":"exact","definition":"The search parameter returns resources that have a value that exactly matches the supplied parameter (the whole string, including casing and accents).","display":"Exact"},{"code":"contains","definition":"The search parameter returns resources that include the supplied parameter value anywhere within the field being searched.","display":"Contains"},{"code":"not","definition":"The search parameter returns resources that do not contain a match.","display":"Not"},{"code":"text","definition":"The search parameter is processed as a string that searches text associated with the code/value - either CodeableConcept.text, Coding.display, Identifier.type.text, or Reference.display.","display":"Text"},{"code":"in","definition":"The search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is in the specified value set.","display":"In"},{"code":"not-in","definition":"The search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is not in the specified value set.","display":"Not In"},{"code":"below","definition":"The search parameter tests whether the value in a resource is subsumed by the specified value (is-a, or hierarchical relationships).","display":"Below"},{"code":"above","definition":"The search parameter tests whether the value in a resource subsumes the specified value (is-a, or hierarchical relationships).","display":"Above"},{"code":"type","definition":"The search parameter only applies to the Resource Type specified as a modifier (e.g. the modifier is not actually :type, but :Patient etc.).","display":"Type"},{"code":"identifier","definition":"The search parameter applies to the identifier on the resource, not the reference.","display":"Identifier"},{"code":"of-type","definition":"The search parameter has the format system|code|value, where the system and code refer to an Identifier.type.coding.system and .code, and match if any of the type codes match. All 3 parts must be present.","display":"Of Type"},{"code":"code-text","definition":"Tests whether the textual display value in a resource (e.g., CodeableConcept.text, Coding.display, or Reference.display) matches the supplied parameter value.","display":"Code Text"},{"code":"text-advanced","definition":"Tests whether the value in a resource matches the supplied parameter value using advanced text handling that searches text associated with the code/value - e.g., CodeableConcept.text, Coding.display, or Identifier.type.text.","display":"Text Advanced"},{"code":"iterate","definition":"The search parameter indicates an inclusion directive (_include, _revinclude) that is applied to an included resource instead of the matching resource.","display":"Iterate"}],"contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"},{"system":"email","value":"fhir@lists.hl7.org"}]},{"telecom":[{"system":"url","value":"http://www.hl7.org/Special/committees/fiwg"}]}],"content":"complete","date":"2021-01-05T10:01:24+11:00","description":"A supported modifier for a search parameter.","experimental":false,"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-wg","valueCode":"fhir"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"normative"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm","valueInteger":5}],"id":"search-modifier-code","identifier":[{"system":"urn:ietf:rfc:3986","value":"urn:oid:2.16.840.1.113883.4.642.4.640"},{"system":"urn:ietf:rfc:3986","use":"old","value":"urn:oid:2.16.840.1.113883.4.642.1.625"},{"system":"urn:ietf:rfc:3986","use":"old","value":"urn:oid:2.16.840.1.113883.4.642.2.92"}],"jurisdiction":[{"coding":[{"code":"001","display":"World","system":"http://unstats.un.org/unsd/methods/m49/m49.htm"}]}],"meta":{"lastUpdated":"2026-03-31T18:55:04.283+00:00"},"name":"SearchModifierCode","publisher":"HL7 International / FHIR Infrastructure","resourceType":"CodeSystem","status":"active","text":{"div":"

Generated Narrative: CodeSystem search-modifier-code

This case-sensitive code system http://hl7.org/fhir/search-modifier-code defines the following codes:

CodeDisplayDefinition
missing MissingThe search parameter returns resources that have a value or not.
exact ExactThe search parameter returns resources that have a value that exactly matches the supplied parameter (the whole string, including casing and accents).
contains ContainsThe search parameter returns resources that include the supplied parameter value anywhere within the field being searched.
not NotThe search parameter returns resources that do not contain a match.
text TextThe search parameter is processed as a string that searches text associated with the code/value - either CodeableConcept.text, Coding.display, Identifier.type.text, or Reference.display.
in InThe search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is in the specified value set.
not-in Not InThe search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is not in the specified value set.
below BelowThe search parameter tests whether the value in a resource is subsumed by the specified value (is-a, or hierarchical relationships).
above AboveThe search parameter tests whether the value in a resource subsumes the specified value (is-a, or hierarchical relationships).
type TypeThe search parameter only applies to the Resource Type specified as a modifier (e.g. the modifier is not actually :type, but :Patient etc.).
identifier IdentifierThe search parameter applies to the identifier on the resource, not the reference.
of-type Of TypeThe search parameter has the format system|code|value, where the system and code refer to an Identifier.type.coding.system and .code, and match if any of the type codes match. All 3 parts must be present.
code-text Code TextTests whether the textual display value in a resource (e.g., CodeableConcept.text, Coding.display, or Reference.display) matches the supplied parameter value.
text-advanced Text AdvancedTests whether the value in a resource matches the supplied parameter value using advanced text handling that searches text associated with the code/value - e.g., CodeableConcept.text, Coding.display, or Identifier.type.text.
iterate IterateThe search parameter indicates an inclusion directive (_include, _revinclude) that is applied to an included resource instead of the matching resource.
","status":"generated"},"title":"Search Modifier Code","url":"http://hl7.org/fhir/search-modifier-code","valueSet":"http://hl7.org/fhir/ValueSet/search-modifier-code","version":"6.0.0-ballot4"}