This page is part of the FHIR Specification (v0.0.82: DSTU 1). The current version which supercedes this version is 5.0.0 . For a full list of available versions, see the Directory of published versions . Page versions: R3 R2 Valueset-usps-state.xml Raw XML ( canonical form ) Definition for Value SetUSPS Two Letter Alphabetic Codes Raw XML On July 1, 1963, the Post Office Department implemented the five-digit ZIP Code, which was placed after the state name in the last line of an address. To provide room for the ZIP Code, the Department issued two-letter abbreviations for all states and territories. Publication 59, Abbreviations for Use with ZIP Code, issued by the Department in October 1963. Currently there is no copyright restrictions on this value set </ValueSet> Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification. © HL7.org 2011+. FHIR DSTU (v0.4.0-4902) generated on Fri, Mar 27, 2015 00:15+1100. Links: What's a DSTU? | Version History | Specification Map | Compare to DSTU1 | | Propose a change