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Unified Medical Language System® (UMLS®)

FAQ   |  Customer Support

UMLS Release File Archives

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


2016AB - present

Version Date released Full Release Files UMLS Metathesaurus Files MRCONSO.RRF

2024AA

May 2024

2024AA Full Release 2024AA UMLS Metathesaurus Full Subset
2024AA UMLS Metathesaurus Level 0 Subset
UMLS History Files 		2024AA 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

2004-2016AA

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

2002 - 2003

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: October 30, 2024