# text.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:

Code | Display | Definition
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 1990 | Military 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 1964 | Military 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 1950 | Military 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 earlier | Military service occurring on or before November 1941.

# description
Defines codes to identify discrete periods of United States military service, used to capture when an individual served in the armed forces.

# 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

# concept[].definition
Military service occurring on or after September 2001, encompassing the post-9/11 era.

# concept[].display
August 1990 through August 2001 (including the Persian Gulf War)

# concept[].definition
Military service occurring between August 1990 and August 2001, encompassing the Persian Gulf War era.

# concept[].definition
Military service occurring between June 1975 and July 1990.

# concept[].display
August 1964 through May 1975 (including the Vietnam War)

# concept[].definition
Military service occurring between August 1964 and May 1975, encompassing the Vietnam War era.

# concept[].definition
Military service occurring between February 1955 and July 1964.

# concept[].display
June 1950 through January 1955 (including the Korean War)

# concept[].definition
Military service occurring between June 1950 and January 1955, encompassing the Korean War era.

# concept[].definition
Military service occurring between January 1947 and May 1950.

# concept[].display
December 1941 through December 1946 (including World War II)

# concept[].definition
Military service occurring between December 1941 and December 1946, encompassing World War II.

# concept[].definition
Military service occurring on or before November 1941.