{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 |
|---|---|---|---|---|
| 2.16.840.1.113883.18.51 | ResultStatus, v2-0123, resultStatus | 0 | 0 | |
| 2.16.840.1.113883.18.52 | TransportationMode, v2-0124, transportationMode | 0 | 0 | |
| 2.16.840.1.113883.18.53 | QuantityLimitedRequest, v2-0126, quantityLimitedRequest | 0 | 0 | |
| 2.16.840.1.113883.18.54 | AllergenType, v2-0127, allergenType | 0 | 0 | |
| 2.16.840.1.113883.18.55 | AllergySeverity, v2-0128, allergySeverity | 0 | 0 | |
| 2.16.840.1.113883.18.56 | VisitUserCodes, v2-0130, visitUserCodes | 0 | 0 | |
| 2.16.840.1.113883.18.57 | contactRole | 0 | 0 | |
| 2.16.840.1.113883.18.58 | ContactRole2, v2-0131, contactRole2 | 0 | 0 | |
| 2.16.840.1.113883.18.59 | ProcedurePractitionerIdentifierCodeType, v2-0133, procedurePractitionerIdentifierCodeType | 0 | 0 | |
| 2.16.840.1.113883.18.60 | AssignmentOfBenefits, v2-0135, assignmentOfBenefits | 0 | 0 | |
| 2.16.840.1.113883.18.61 | MailClaimParty, v2-0137, mailClaimParty | 0 | 0 | |
| 2.16.840.1.113883.18.62 | MilitaryService, v2-0140, militaryService | 0 | 0 | |
| 2.16.840.1.113883.18.63 | militaryRank-Grade | 0 | 0 | |
| 2.16.840.1.113883.18.64 | MilitaryStatus, v2-0142, militaryStatus | 0 | 0 | |
| 2.16.840.1.113883.18.65 | EligibilitySource, v2-0144, eligibilitySource | 0 | 0 | |
| 2.16.840.1.113883.18.66 | RoomType, v2-0145, roomType | 0 | 0 | |
| 2.16.840.1.113883.18.67 | AmountType, v2-0146, amountType | 0 | 0 | |
| 2.16.840.1.113883.18.68 | PolicyType, v2-0147, policyType | 0 | 0 | |
| 2.16.840.1.113883.18.69 | MoneyOrPercentageIndicator, v2-0148, moneyOrPercentageIndicator | 0 | 0 | |
| 2.16.840.1.113883.18.70 | DayType, v2-0149, dayType | 0 | 0 | |
| 2.16.840.1.113883.18.71 | CertificationPatientType, v2-0150, certificationPatientType | 0 | 0 | |
| 2.16.840.1.113883.18.73 | AcceptApplicationAcknowledgmentConditions, v2-0155, accept-applicationAcknowledgmentConditions | 0 | 0 | |
| 2.16.840.1.113883.18.74 | WhichDateTimeQualifier, v2-0156, whichDate-timeQualifier | 0 | 0 | |
| 2.16.840.1.113883.18.75 | WhichDateTimeStatusQualifier, v2-0157, whichDate-timeStatusQualifier | 0 | 0 | |
| 2.16.840.1.113883.18.76 | DateTimeSelectionQualifier, v2-0158, date-timeSelectionQualifier | 0 | 0 | |
| 2.16.840.1.113883.18.77 | DietCodeSpecificationType, v2-0159, dietCodeSpecificationType | 0 | 0 | |
| 2.16.840.1.113883.18.78 | TrayType, v2-0160, trayType | 0 | 0 | |
| 2.16.840.1.113883.18.79 | AllowSubstitution, v2-0161, allowSubstitution | 0 | 0 | |
| 2.16.840.1.113883.18.80 | RouteOfAdministration, v2-0162, routeOfAdministration | 0 | 0 | |
| 2.16.840.1.113883.18.81 | BodySite, v2-0163, bodySite | 0 | 0 | |
| 2.16.840.1.113883.18.82 | AdministrationDevice, v2-0164, administrationDevice | 0 | 0 | |
| 2.16.840.1.113883.18.83 | AdministrationMethod, v2-0165, administrationMethod | 0 | 0 | |
| 2.16.840.1.113883.18.84 | RxComponentType, v2-0166, rxComponentType | 0 | 0 | |
| 2.16.840.1.113883.18.85 | SubstitutionStatus, v2-0167, substitutionStatus | 0 | 0 | |
| 2.16.840.1.113883.18.86 | ProcessingPriority, v2-0168, processingPriority | 0 | 0 | |
| 2.16.840.1.113883.18.87 | ReportingPriority, v2-0169, reportingPriority | 0 | 0 | |
| 2.16.840.1.113883.18.88 | DerivedSpecimen, v2-0170, derivedSpecimen | 0 | 0 | |
| 2.16.840.1.113883.18.89 | CoordinationOfBenefits, v2-0173, coordinationOfBenefits | 0 | 0 | |
| 2.16.840.1.113883.18.91 | MasterFileIdentifierCodes, v2-0175, masterFileIdentifierCodes | 0 | 0 | |
| 2.16.840.1.113883.18.92 | ConfidentialityCodes, v2-0177, confidentialityCodes | 0 | 0 | |
| 2.16.840.1.113883.18.93 | FileLevelEvent, v2-0178, file-levelEvent | 0 | 0 | |
| 2.16.840.1.113883.18.94 | ResponseLevel, v2-0179, responseLevel | 0 | 0 | |
| 2.16.840.1.113883.18.95 | MasterfileActionCode, v2-0180, masterfileActionCode | 0 | 0 | |
| 2.16.840.1.113883.18.96 | MfnRecordLevelErrorReturn, v2-0181, mfnRecord-levelErrorReturn | 0 | 0 | |
| 2.16.840.1.113883.18.97 | ActiveInactive, v2-0183, active-inactive | 0 | 0 | |
| 2.16.840.1.113883.18.98 | PreferredMethodOfContact, v2-0185, preferredMethodOfContact | 0 | 0 | |
| 2.16.840.1.113883.18.99 | ProviderBilling, v2-0187, providerBilling | 0 | 0 | |
| 2.16.840.1.113883.18.100 | EthnicGroup, v2-0189, ethnicGroup | 0 | 0 | |
| 2.16.840.1.113883.18.101 | AddressType, v2-0190, addressType | 0 | 0 | |
| 2.16.840.1.113883.18.102 | TypeOfReferencedData, v2-0191, typeOfReferencedData | 0 | 0 |