| CanadaProvinceCodes | http://canadapost.ca/CodeSystem/ProvinceCodes | |
| CAPeCC | http://cap.org/eCC | |
| Indicator | http://cds-hooks.hl7.org/CodeSystem/indicator | |
| CCI | http://cihi.ca/fhir/CodeSystem/cihi-cci | |
| ClinicalTrialsGov | http://clinicaltrials.gov | |
| DCM, DICOM Controlled Terminology Definitions | http://dicom.nema.org/resources/ontology/DCM | |
| UNII | http://fdasis.nlm.nih.gov | |
| NHIN PurposeOfUse, NHINPurposeOfUse | http://healthit.gov/nhin/purposeofuse | |
| AbstractType | http://hl7.org/fhir/abstract-types | |
| AccountAggregate | http://hl7.org/fhir/account-aggregate | |
| AccountBalanceTerm | http://hl7.org/fhir/account-balance-term | |
| AccountBillingStatus | http://hl7.org/fhir/account-billing-status | |
| AccountRelationship | http://hl7.org/fhir/account-relationship | |
| AccountStatus | http://hl7.org/fhir/account-status | |
| ActionCardinalityBehavior | http://hl7.org/fhir/action-cardinality-behavior | |
| ActionCode | http://hl7.org/fhir/action-code | |
| ActionConditionKind | http://hl7.org/fhir/action-condition-kind | |
| ActionGroupingBehavior | http://hl7.org/fhir/action-grouping-behavior | |
| ActionParticipantFunction | http://hl7.org/fhir/action-participant-function | |
| ActionParticipantType | http://hl7.org/fhir/action-participant-type | |
| ActionPrecheckBehavior | http://hl7.org/fhir/action-precheck-behavior | |
| ActionReasonCode | http://hl7.org/fhir/action-reason-code | |
| ActionRelationshipType | http://hl7.org/fhir/action-relationship-type | |
| ActionRequiredBehavior | http://hl7.org/fhir/action-required-behavior | |
| ActionSelectionBehavior | http://hl7.org/fhir/action-selection-behavior | |
| AdditionalMaterialCodes | http://hl7.org/fhir/additionalmaterials | |
| AddressType | http://hl7.org/fhir/address-type | |
| AddressUse | http://hl7.org/fhir/address-use | |
| AdministrableDoseForm | http://hl7.org/fhir/administrable-dose-form | |
| AdministrativeGender | http://hl7.org/fhir/administrative-gender | |
| AdverseEventActuality | http://hl7.org/fhir/adverse-event-actuality | |
| AllergyIntoleranceSubstanceExposureRisk | http://hl7.org/fhir/allerg-intol-substance-exp-risk | |
| AllergyIntoleranceCategory | http://hl7.org/fhir/allergy-intolerance-category | |
| AllergyIntoleranceCriticality | http://hl7.org/fhir/allergy-intolerance-criticality | |
| AllergyIntoleranceType | http://hl7.org/fhir/allergy-intolerance-type | |
| GenderStatus | http://hl7.org/fhir/animal-genderstatus | |
| AnimalSpecies | http://hl7.org/fhir/animal-species | |
| AnimalTissueType | http://hl7.org/fhir/animal-tissue-type | |
| AppointmentStatus | http://hl7.org/fhir/appointmentstatus | |
| ArtifactAssessmentDisposition | http://hl7.org/fhir/artifactassessment-disposition | |
| ArtifactAssessmentInformationType | http://hl7.org/fhir/artifactassessment-information-type | |
| ArtifactAssessmentWorkflowStatus | http://hl7.org/fhir/artifactassessment-workflow-status | |
| ArtifactContributionInstanceType | http://hl7.org/fhir/artifact-contribution-instance-type | |
| ArtifactContributionType | http://hl7.org/fhir/artifact-contribution-type | |
| ArtifactUrlClassifier | http://hl7.org/fhir/artifact-url-classifier | |
| AssertionDirectionType | http://hl7.org/fhir/assert-direction-codes | |
| AssertionManualCompletionType | http://hl7.org/fhir/assert-manual-completion-codes | |
| AssertionOperatorType | http://hl7.org/fhir/assert-operator-codes | |
| AssertionResponseTypes | http://hl7.org/fhir/assert-response-code-types | |
| ContractAssetAvailability, ContractResourceAssetAvailiabilityCodes | http://hl7.org/fhir/asset-availability | |
| AuditEventAction | http://hl7.org/fhir/audit-event-action | |
| AuditEventOutcome | http://hl7.org/fhir/audit-event-outcome | |
| AuditEventSeverity | http://hl7.org/fhir/audit-event-severity | |
| BindingStrength | http://hl7.org/fhir/binding-strength | |
| BiologicallyDerivedProductCodes | http://hl7.org/fhir/biologicallyderived-productcodes | |
| BiologicallyDerivedProductDispense | http://hl7.org/fhir/biologicallyderivedproductdispense-status | |
| BiologicallyDerivedProductPropertyTypeCodes | http://hl7.org/fhir/biologicallyderived-product-property-type-codes | |
| BiologicallyDerivedProductStatus | http://hl7.org/fhir/biologicallyderived-product-status | |
| BundleType | http://hl7.org/fhir/bundle-type | |
| BundleTypeGerman | http://hl7.org/fhir/bundle-type-de | |
| CapabilityStatementKind | http://hl7.org/fhir/capability-statement-kind | |
| CSSearchModeCS | http://hl7.org/fhir/capabilitystatement-search-mode | |
| CarePlanActivityStatus | http://hl7.org/fhir/care-plan-activity-status | |
| CareTeamStatus | http://hl7.org/fhir/care-team-status | |
| CatalogType | http://hl7.org/fhir/catalogType | |
| EvidenceCertaintyRating | http://hl7.org/fhir/certainty-rating | |
| EvidenceCertaintyType | http://hl7.org/fhir/certainty-type | |
| CharacteristicCombination | http://hl7.org/fhir/characteristic-combination | |
| CharacteristicOffset | http://hl7.org/fhir/characteristic-offset | |
| ChargeItemStatus | http://hl7.org/fhir/chargeitem-status | |
| ChoiceListOrientation | http://hl7.org/fhir/choice-list-orientation | |
| CitationArtifactClassifier | http://hl7.org/fhir/citation-artifact-classifier | |
| CitationClassificationType | http://hl7.org/fhir/citation-classification-type | |
| CitationStatusType | http://hl7.org/fhir/citation-status-type | |
| CitationSummaryStyle | http://hl7.org/fhir/citation-summary-style | |
| CitedArtifactAbstractType | http://hl7.org/fhir/cited-artifact-abstract-type | |
| CitedArtifactClassificationType | http://hl7.org/fhir/cited-artifact-classification-type | |
| CitedArtifactPartType | http://hl7.org/fhir/cited-artifact-part-type | |
| CitedArtifactStatusType | http://hl7.org/fhir/cited-artifact-status-type | |
| CitedMedium | http://hl7.org/fhir/cited-medium | |
| ClaimAdjudicationDecisionCodes | http://hl7.org/fhir/claim-decision | |
| ClaimAdjudicationDecisionReasonCodes | http://hl7.org/fhir/claim-decision-reason | |
| ClaimProcessingOutcomeCodes | http://hl7.org/fhir/claim-outcome | |
| Use | http://hl7.org/fhir/claim-use | |
| ClinicalUseDefinitionCategory | http://hl7.org/fhir/clinical-use-definition-category | |
| ClinicalUseDefinitionType | http://hl7.org/fhir/clinical-use-definition-type | |
| CodeSearchSupport | http://hl7.org/fhir/code-search-support | |
| AdditionalBindingPurposeCodes | http://hl7.org/fhir/CodeSystem/additional-binding-purpose | |
| AdministrationSubPotentReason | http://hl7.org/fhir/CodeSystem/administration-subpotent-reason | |
| AlternativeCodeKind | http://hl7.org/fhir/codesystem-altcode-kind | |
| ArtifactCommentType | http://hl7.org/fhir/CodeSystem/artifact-comment-type | |
| BiologicallyDerivedProductDispenseMatchStatus | http://hl7.org/fhir/CodeSystem/biologicallyderivedproductdispense-match-status | |
| BiologicallyDerivedProductDispenseOriginRelationship | http://hl7.org/fhir/CodeSystem/biologicallyderivedproductdispense-origin-relationship | |
| BiologicallyDerivedProductDispensePerformerFunction | http://hl7.org/fhir/CodeSystem/biologicallyderivedproductdispense-performer-function | |
| CodeSystemContentMode | http://hl7.org/fhir/codesystem-content-mode | |
| DeviceDispenseStatusReasonCodes | http://hl7.org/fhir/CodeSystem/devicedispense-status-reason | |
| ACMECholCodesBlood | http://hl7.org/fhir/CodeSystem/example | |
| ExampleMetadata | http://hl7.org/fhir/CodeSystem/example-metadata | |
| ExampleMetadata | http://hl7.org/fhir/CodeSystem/example-metadata-2 | |
| CholCodeLegacyStatus | http://hl7.org/fhir/CodeSystem/example-supplement | |