{ "resourceType" : "CodeSystem", "id" : "us-military-service-period", "meta" : { "lastUpdated" : "2026-05-11T00:00:00.000+00:00", "profile" : ["http://hl7.org/fhir/StructureDefinition/shareablecodesystem"] }, "language" : "en", "text" : { "status" : "generated", "div" : "

Generated Narrative: CodeSystem us-military-service-period

Last updated: 2026-05-11 00:00:00+0000; Language: en

Profile: Shareable CodeSystem

This case-sensitive code system http://terminology.hl7.org/CodeSystem/us-military-service-period defines the following codes:

CodeDisplayDefinition
post-911 September 2001 or later (Post 9/11)Military service occurring on or after September 2001, encompassing the post-9/11 era.
persian-gulf-war August 1990 through August 2001 (including the Persian Gulf War)Military service occurring between August 1990 and August 2001, encompassing the Persian Gulf War era.
period-1975-1990 June 1975 through July 1990Military service occurring between June 1975 and July 1990.
vietnam-war August 1964 through May 1975 (including the Vietnam War)Military service occurring between August 1964 and May 1975, encompassing the Vietnam War era.
period-1955-1964 February 1955 through July 1964Military service occurring between February 1955 and July 1964.
korean-war June 1950 through January 1955 (including the Korean War)Military service occurring between June 1950 and January 1955, encompassing the Korean War era.
period-1947-1950 January 1947 through May 1950Military service occurring between January 1947 and May 1950.
world-war-ii December 1941 through December 1946 (including World War II)Military service occurring between December 1941 and December 1946, encompassing World War II.
pre-1941 November 1941 or earlierMilitary service occurring on or before November 1941.
" }, "extension" : [{ "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg", "valueCode" : "cgp" }], "url" : "http://terminology.hl7.org/CodeSystem/us-military-service-period", "version" : "1.0.0", "name" : "USMilitaryServicePeriod", "title" : "US Military Service Period", "status" : "active", "experimental" : false, "date" : "2026-05-11T00:00:00-04:00", "publisher" : "Health Level Seven International", "contact" : [{ "telecom" : [{ "system" : "url", "value" : "http://hl7.org" }, { "system" : "email", "value" : "hq@HL7.org" }] }], "description" : "Defines codes to identify discrete periods of United States military service, used to capture when an individual served in the armed forces.", "jurisdiction" : [{ "coding" : [{ "system" : "urn:iso:std:iso:3166", "code" : "US" }] }], "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", "caseSensitive" : true, "content" : "complete", "count" : 9, "concept" : [{ "code" : "post-911", "display" : "September 2001 or later (Post 9/11)", "definition" : "Military service occurring on or after September 2001, encompassing the post-9/11 era." }, { "code" : "persian-gulf-war", "display" : "August 1990 through August 2001 (including the Persian Gulf War)", "definition" : "Military service occurring between August 1990 and August 2001, encompassing the Persian Gulf War era." }, { "code" : "period-1975-1990", "display" : "June 1975 through July 1990", "definition" : "Military service occurring between June 1975 and July 1990." }, { "code" : "vietnam-war", "display" : "August 1964 through May 1975 (including the Vietnam War)", "definition" : "Military service occurring between August 1964 and May 1975, encompassing the Vietnam War era." }, { "code" : "period-1955-1964", "display" : "February 1955 through July 1964", "definition" : "Military service occurring between February 1955 and July 1964." }, { "code" : "korean-war", "display" : "June 1950 through January 1955 (including the Korean War)", "definition" : "Military service occurring between June 1950 and January 1955, encompassing the Korean War era." }, { "code" : "period-1947-1950", "display" : "January 1947 through May 1950", "definition" : "Military service occurring between January 1947 and May 1950." }, { "code" : "world-war-ii", "display" : "December 1941 through December 1946 (including World War II)", "definition" : "Military service occurring between December 1941 and December 1946, encompassing World War II." }, { "code" : "pre-1941", "display" : "November 1941 or earlier", "definition" : "Military service occurring on or before November 1941." }] }