UMLS Release File Archives

Please visit the UMLS Reference Manual for details about the UMLS release files below. The current release is located at this link

Version	Date released	Full Release Files	UMLS Metathesaurus Files	MRCONSO.RRF
2023AA	May 2023	2023AA Full Release	2023AA UMLS Metathesaurus Full Subset 2023AA UMLS Metathesaurus Level 0 Subset UMLS History Files	2023AA MRCONSO.RRF
2022AB	November 2022	2022AB Full Release	2022AB UMLS Metathesaurus Full Subset 2022AB UMLS Metathesaurus Level 0 Subset UMLS History Files	2022AB MRCONSO.RRF
2022AA	May 2 2022	2022AA Full Release	2022AA UMLS Metathesaurus Files	2022AA MRCONSO.RRF
2021AB	November 1 2021	2021AB Full Release	2021AB UMLS Metathesaurus Files	2021AB MRCONSO.RRF
2021AA	November 1 2021	2021AA Full Release	2021AA UMLS Metathesaurus Files	2021AA MRCONSO.RRF
2020AB	November 2 2020	2020AB Full Release	2020AB UMLS Metathesaurus Files	2020AB MRCONSO.RRF
2020AA	May 4 2020	2020AA Full Release	2020AA UMLS Metathesaurus Files	2020AA MRCONSO.RRF
2019AB	November 4 2019	2019AB Full Release	2019AB UMLS Metathesaurus Files	2019AB MRCONSO.RRF
2019AA	May 6 2019	2019AA Full Release	2019AA UMLS Metathesaurus Files	2019AA MRCONSO.RRF
2018AB	November 5 2018	2018AB Full Release	Unavailable	Unavailable
2018AA	May 7 2018	2018AA Full Release	Unavailable	Unavailable
2017AB	November 6 2017	2017AB Full Release	Unavailable	Unavailable
2017AA	May 8 2017	2017AA Full Release	2017AA Active Release	Unavailable
2016AB	November 6 2016	2016AB Full Release	2016AB Active Release	Unavailable

Note: Releases from 2013AA-2016AA contained active and full release files.

Version	Date released	CHK and MD5	1-meta.nlm, 2-meta.nlm, and otherks.nlm	mmsys.zip	copyright notice and README.txt
2016AA full release files	May 9 2016	2016AA.CHK 2016AA.MD5	2016aa-1-meta.nlm 2016aa-2-meta.nlm 2016aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2016AA active release files	May 9 2016	2016AA.CHK 2016AA.MD5	2016aa-1-meta.nlm 2016aa-2-meta.nlm 2016aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2015AB full release files	November 9 2015	2015AB.CHK 2015AB.MD5	2015ab-1-meta.nlm 2015ab-2-meta.nlm 2015ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2015AB active release files	November 9, 2015	2015AB.CHK 2015AB.MD5	2015ab-1-meta.nlm 2015ab-2-meta.nlm 2015ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2015AA	May 11, 2015	2015AA.CHK 2015AA.MD5	2015aa-1-meta.nlm 2015aa-2-meta.nlm 2015aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2015AA active release files	May 11 2015	2015AA.CHK 2015AA.MD5	2015aa-1-meta.nlm 2015aa-2-meta.nlm 2015aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2014AB full release files	November 10 2014	2014AB.CHK 2014AB.MD5	2014ab-1-meta.nlm 2014ab-2-meta.nlm 2014ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2014AB active release files	November 10 2014	2014AB.CHK 2014AB.MD5	2014ab-1-meta.nlm 2014ab-2-meta.nlm 2014ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2014AA	May 5 2014	2014AA.CHK 2014AA.MD5	2014aa-1-meta.nlm 2014aa-2-meta.nlm 2014aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2014AA active release files	May 5 2014	2014AA.CHK 2014AA.MD5	2014aa-1-meta.nlm 2014aa-2-meta.nlm 2014aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2013AB full release files	February 10 2014	2013AB.CHK 2013AB.MD5	2013ab-1-meta.nlm 2013ab-2-meta.nlm 2013ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2013AB active release files	February 10 2014	2013AB.CHK 2013AB.MD5	2013ab-1-meta.nlm 2013ab-2-meta.nlm 2013ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2013AA full release files	May 8 2013	2013AA.CHK 2013AA.MD5	2013aa-1-meta.nlm 2013aa-2-meta.nlm 2013aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2013AA active release files	May 8 2013	2013AA.CHK 2013AA.MD5	2013aa-1-meta.nlm 2013aa-2-meta.nlm 2013aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2012AB full release files	November 15 2012	2012AB.CHK 2012AB.MD5	2012ab-1-meta.nlm 2012ab-2-meta.nlm 2012ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2012AA full release files	May 7 2012	2012AA.CHK 2012AA.MD5	2012aa-1-meta.nlm 2012aa-2-meta.nlm 2012aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2011AB full release files	November 18 2011	2011AB.CHK 2011AB.MD5	2011ab-1-meta.nlm 2011ab-2-meta.nlm 2011ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2011AA full release files	May 5 2011	2011AA.CHK 2011AA.MD5	2011aa-1-meta.nlm 2011aa-2-meta.nlm 2011aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2010AB full release files	November 1 2010	2010AB.CHK 2010AB.MD5	2010ab-1-meta.nlm 2010ab-2-meta.nlm 2010ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2010AA full release files	April 3 2010	2010AA.CHK 2010AA.MD5	2010aa-1-meta.nlm 2010aa-2-meta.nlm 2010aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2009AB full release files	November 2 2009	2009AB.CHK 2009AB.MD5	2009ab-1-meta.nlm 2009ab-2-meta.nlm 2009ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2009AA full release files	April 6 2009	2009AA.CHK 2009AA.MD5	2009aa-1-meta.nlm 2009aa-2-meta.nlm 2009aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2008AB full release files	November 17 2008	2008AB.CHK 2008AB.MD5	2008ab-1-meta.nlm 2008ab-2-meta.nlm 2008ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2008AA full release files	April 1 2008	2008AA.CHK 2008AA.MD5	2008aa-1-meta.nlm 2008aa-2-meta.nlm 2008aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2007AC full release files	November 5 2007	2007AC.CHK 2007AC.MD5	2007ac-1-meta.nlm 2007ac-2-meta.nlm 2007ac-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2007AB full release files	July 3 2007	2007AB.CHK 2007AB.MD5	2007ab-1-meta.nlm 2007ab-2-meta.nlm 2007ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2007AA full release files	January 16 2007	2007AA.CHK 2007AA.MD5	2007aa-1-meta.nlm 2007aa-1-meta.nlm 2007aa-2-meta.nlm 2007aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2006AD full release files	November 3 2006	2006AD.CHK 2006AD.MD5	2006ad-1-meta.nlm 2006ad-2-meta.nlm 2006ad-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2006AC full release files	July 17 2006	2006AC.CHK 2006AC.MD5	2006ac-1-meta.nlm 2006ac-2-meta.nlm 2006ac-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2006AB full release files	May 10 2006	2006AB.CHK 2006AB.MD5	2006ab-1-meta.nlm 2006ab-2-meta.nlm 2006ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2006AA full release files	February 13 2006	2006AA.CHK 2006AA.MD5	2006aa-1-meta.nlm 2006aa-2-meta.nlm 2006aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2005AC full release files	November 23 2005	2005AC.CHK 2005AC.MD5	2005ac-1-meta.nlm 2005ac-2-meta.nlm 2005ac-3-meta.nlm 2005ac-otherks.nlm	mmsys.zip	Unavailable
2005AB full release files	June 16 2005	2005AB.CHK 2005AB.MD5	2005ab-1-meta.nlm 2005ab-2-meta.nlm 2005ab-3-meta.nlm 2005ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2005AA full release files	January 19 2005	2005AA.CHK 2005AA.MD5	2005aa-1-meta.nlm 2005aa-2-meta.nlm 2005aa-3-meta.nlm 2005aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2004AC full release files	October 26 2004	2004AC.CHK 2004AC.MD5	2004ac-1-meta.nlm 2004ac-2-meta.nlm 2004ac-3-meta.nlm 2004ac-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2004AB full release files	July 23 2004	2004AB.CHK 2004AB.MD5	2004ab-1-meta.nlm 2004ab-2-meta.nlm 2004ab-3-meta.nlm 2004ab-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt
2004AA full release files	July 23 2004	2004AA.CHK 2004AA.MD5	2004aa-1-meta.nlm 2004aa-2-meta.nlm 2004aa-3-meta.nlm 2004aa-otherks.nlm	mmsys.zip	Copyright_Notice.txt README.txt

Note: Each release from 2002-2003 came in two formats: ISO and UNIX.

Version	Format	Date released	CHK and MD5	ZIP or TGZ _1 and _2	copyright notice and additional documentation
2003AC	ISO format (.ZIP)	November 2003	2003AC.CHK 2003AC.MD5	2003AC_1_F01.ZIP 2003AC_2_F01.ZIP	Copyright_Notice2003AC.txt
2003AC	UNIX format (.tgz)	November 2003	2003AC.CHK 2003AC.MD5	2003AC_1_F01.TGZ 2003AC_2_F01.TGZ	Copyright_Notice2003AC.txt
2003AB	ISO format (.ZIP)	July 2003	2003AB.CHK 2003AB.MD5	2003AB_1.ZIP 2003AB_2.ZIP	Copyright_Notice2003AB.txt
2003AB	UNIX format (.tgz)	July 2003	2003AB.CHK 2003AB.MD5	2003AB_1.TGZ 2003AB_2.TGZ	Copyright_Notice2003AB.txt
2003AA_01	ISO format (.ZIP)	January 2003	2003AA.CHK 2003AA.MD5	2003AA_1_F01.ZIP 2003AA_2_F01.ZIP	Copyright_Notice2003AA_01.txt
2003AA_01	UNIX format (.tgz)	January 2003	2003AA.CHK 2003AA.MD5	2003AA_1_F01.TGZ 2003AA_2_F01.TGZ	Copyright_Notice2003AA_01.txt
2003AA	ISO format (.ZIP)	January 2003	2003AA.CHK 2003AA.MD5	2003AA_1.ZIP 2003AA_2.ZIP	Copyright_Notice.txt
2003AA	UNIX format (.tgz)	January 2003	2003AA.CHK 2003AA.MD5	2003AA_1.TGZ 2003AA_2.TGZ	Copyright_Notice.txt
2002AD	ISO format (.ZIP)	November 2002	2002AD.CHK 2002AD.MD5	2002AD_1.ZIP 2002AD_2.ZIP	Copyright_Notice.txt 2002AD_Addendum.txt
2002AD	UNIX format (.tgz)	November 2002	2002AD.CHK 2002AD.MD5	2002AD_1.TGZ 2002AD_2.TGZ	Copyright_Notice.txt 2002AD_Addendum.txt
2002AC	ISO format (.ZIP)	September 2002	2002AC.CHK 2002AC.MD5	2002AC_1.ZIP 2002AC_2.ZIP	Copyright_Notice.txt 2002AC_Addendum.txt
2002AC	UNIX format (.tgz)	September 2002	2002AC.CHK 2002AC.MD5	2002AC_1.TGZ 2002AC_2.TGZ	Copyright_Notice.txt 2002AC_Addendum.txt
2002AB	ISO format (.ZIP)	May 2002	2002AB.CHK 2002AB.MD5	2002AB_1.ZIP 2002AB_2.ZIP	Copyright_Notice.txt 2002AB_Addendum.txt
2002AB	UNIX format (.tgz)	May 2002	2002AB.CHK 2002AB.MD5	2002AB_1.TGZ 2002AB_2.TGZ	Copyright_Notice.txt 2002AB_Addendum.txt
2002aa	ISO format (.ZIP)	April 2002	2002aa.chk 2002aa.md5	2002aa.zip	cpyright.txt readme.txt
2002aa	UNIX format (.tgz)	April 2002	2002aa.chk 2002aa.md5	2002aa.tgz	Copyright_Notice.txt README.txt

Last Reviewed: November 3, 2023

Unified Medical Language System^® (UMLS^®)

2016AB-present

2004-2016AA

2002-2003

Unified Medical Language System® (UMLS®)

2016AB-present

2004-2016AA

2002-2003

Unified Medical Language System^® (UMLS^®)