{2 16 840 1 113883 18 90}
Code system of concepts specifying an identification of a test battery, an entire functional procedure or study, a single test value (observation), multiple test batteries or functional procedures as an orderable unit (profile), or a single test value (observation) calculated from other independent observations, typically used as an indicator for Master Files. Used in HL7 Version 2.x messaging in the OM1 segment.
Status in source: complete.
Names: natureOfServiceTestObservation
{
"organization": "HL7 International",
"coding_system_name": "Nature of Service/Test/Observation",
"published_oid_type": "18"
}HL7 report status: OID review is complete.
· Download HL7 International OID Registry — all types, statuses and fieldsDownloaded: 2026-10-25T23:05:32.096080+00:00.
Status in source: active.
Names: NatureOfServiceTestObservation, v2-0174
{
"url": "http://terminology.hl7.org/CodeSystem/v2-0174",
"date": "2019-12-01",
"title": "natureOfServiceTestObservation",
"status": "active",
"contact": [
{
"telecom": [
{
"value": "http://hl7.org",
"system": "url"
},
{
"value": "hq@HL7.org",
"system": "email"
}
]
}
],
"purpose": "Underlying Master Code System for V2 table 0174 (Nature of Service/Test/Observation)",
"version": "3.0.0",
"copyright": "This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html",
"publisher": "Health Level Seven International",
"experimental": false,
"caseSensitive": true,
"compositional": false,
"resource_type": "CodeSystem",
"versionNeeded": false,
"oid_identifier": {
"value": "urn:oid:2.16.840.1.113883.18.90",
"system": "urn:ietf:rfc:3986"
},
"hierarchyMeaning": "is-a"
}Downloaded: 2026-10-19T20:26:54.046133+00:00.
| OID | Name | Direct children | Descendants | Description |
|---|---|---|---|---|
| 2.16.840.1.113883.18.408 | MimeTypes, v2-0834, mimeTypes | 0 | 0 | |
| 2.16.840.1.113883.18.409 | TelecommunicationExpirationReason, v2-0868, telecommunicationExpirationReason | 0 | 0 | |
| 2.16.840.1.113883.18.410 | SupplyRisk, v2-0871, supplyRisk | 0 | 0 | |
| 2.16.840.1.113883.18.411 | RoleExecutingPhysician, v2-0881, roleExecutingPhysician | 0 | 0 | |
| 2.16.840.1.113883.18.412 | MedicalRoleExecutingPhysician, v2-0882, medicalRoleExecutingPhysician | 0 | 0 | |
| 2.16.840.1.113883.18.413 | SideOfBody, v2-0894, sideOfBody | 0 | 0 | |
| 2.16.840.1.113883.18.415 | SecurityCheckScheme, v2-0904, securityCheckScheme | 0 | 0 | |
| 2.16.840.1.113883.18.416 | ShipmentStatus, v2-0905, shipmentStatus | 0 | 0 | |
| 2.16.840.1.113883.18.417 | Actpriority, v2-0906, actpriority | 0 | 0 | |
| 2.16.840.1.113883.18.418 | Confidentiality, v2-0907, confidentiality | 0 | 0 | |
| 2.16.840.1.113883.18.419 | PatientResultsReleaseCategorizationScheme, v2-0909, patientResultsReleaseCategorizationScheme | 0 | 0 | |
| 2.16.840.1.113883.18.420 | Participation, v2-0912, participation | 0 | 0 | |
| 2.16.840.1.113883.18.421 | RootCause, v2-0914, rootCause | 0 | 0 | |
| 2.16.840.1.113883.18.422 | RelevantClincialInformation, v2-0916, relevantClincialInformation | 0 | 0 | |
| 2.16.840.1.113883.18.423 | BolusType, v2-0917, bolusType | 0 | 0 | |
| 2.16.840.1.113883.18.424 | PcaType, v2-0918, pcaType | 0 | 0 | |
| 2.16.840.1.113883.18.425 | ExclusiveTest, v2-0919, exclusiveTest | 0 | 0 | |
| 2.16.840.1.113883.18.426 | PreferredSpecimenAttributeStatus, v2-0920, preferredSpecimen-AttributeStatus | 0 | 0 | |
| 2.16.840.1.113883.18.427 | CertificationType, v2-0921, certificationType | 0 | 0 | |
| 2.16.840.1.113883.18.428 | CertificationCategory, v2-0922, certificationCategory | 0 | 0 | |
| 2.16.840.1.113883.18.429 | ProcessInterruption, v2-0923, processInterruption | 0 | 0 | |
| 2.16.840.1.113883.18.430 | CumulativeDosageLimitUom, v2-0924, cumulativeDosageLimitUom | 0 | 0 | |
| 2.16.840.1.113883.18.431 | PhlebotomyIssue, v2-0925, phlebotomyIssue | 0 | 0 | |
| 2.16.840.1.113883.18.432 | PhlebotomyStatus, v2-0926, phlebotomyStatus | 0 | 0 | |
| 2.16.840.1.113883.18.433 | ArmStick, v2-0927, armStick | 0 | 0 | |
| 2.16.840.1.113883.18.434 | IntendedProcedureType, v2-0933, intendedProcedureType | 0 | 0 | |
| 2.16.840.1.113883.18.435 | ProcessInterruptionReason, v2-0935, processInterruptionReason | 0 | 0 | |
| 2.16.840.1.113883.18.436 | NameAddressRepresentation, v2-4000, name-addressRepresentation | 0 | 0 | |
| 2.16.840.1.113883.18.438 | dischargeDisposition | 0 | 0 | |
| 2.16.840.1.113883.18.439 | ObservationType, v2-0936, observationType | 0 | 0 | |
| 2.16.840.1.113883.18.440 | ObservationSubtype, v2-0937, observationSubtype | 0 | 0 | |
| 2.16.840.1.113883.18.441 | CollectionEvent, v2-0938, collectionEvent | 0 | 0 | |
| 2.16.840.1.113883.18.442 | CommunicationLocation, v2-0939, communicationLocation | 0 | 0 | |
| 2.16.840.1.113883.18.443 | LimitationTypeCode, v2-0940, limitationTypeCode | 0 | 0 | |
| 2.16.840.1.113883.18.444 | EquipmentStateIndicator, v2-0942, equipmentStateIndicator | 0 | 0 | |
| 2.16.840.1.113883.18.445 | AutoDilutionType, v2-0945, auto-DilutionType | 0 | 0 | |
| 2.16.840.1.113883.18.446 | SupplierType, v2-0946, supplierType | 0 | 0 | |
| 2.16.840.1.113883.18.447 | approvalIndicator | 0 | 0 | |
| 2.16.840.1.113883.18.448 | V2CSRelationshipType, v2-0948, v2CS-relationshipType | 0 | 0 | |
| 2.16.840.1.113883.18.449 | OrderControlCodeReason, v2-0949, orderControlCodeReason | 0 | 0 | |
| 2.16.840.1.113883.18.450 | OrderStatusModifier, v2-0950, orderStatusModifier | 0 | 0 | |
| 2.16.840.1.113883.18.451 | ReasonForStudy, v2-0951, reasonForStudy | 0 | 0 | |
| 2.16.840.1.113883.18.453 | OnlineVerificationResult, v2-0970 | 0 | 0 | |
| 2.16.840.1.113883.18.454 | OnlineVerificationResultErrorCodes, v2-0971 | 0 | 0 | |
| 2.16.840.1.113883.18.455 | QuantityUnits, v2-0560 | 0 | 0 |