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Unified Medical Language System® (UMLS®)

2009AB ICD-9-CM Entry Terms Source Information


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Term TypeDescriptionCount (MRCONSO.RRF)
ET Entry "term" 19852


  • A term type indicates the role an atom plays in its source
  • An atom is the smallest unit of naming in a source; that is, a specific string with specific code values and identifiers from a specific source.
  • Every atom has a separate row in MRCONSO.RRF. Every atom is assigned a term type.
  • Term types are assigned based on source documentation or NLM understanding of the source.
  • Sample data are provided for every term type in the source (see below).
  • See Appendix B3 for a list of all term type abbreviations and their full names.
  • See Appendix B.5 for a list of sources and their associated term types, listed in default order of precedence.
  • See Section of UMLS Documentation for more information on MRCONSO.RRF.

Sample Data


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C0010280 A8364691 L0010280 S1308395 01.24 01.24 Craniotomy NOS
C0863213 A8366472 L1702895 S1920429 01.31 01.31 Drainage of cerebral subarachnoid abscess
C0152705 A8370631 L1706137 S1924690 013.82 013.82 Other specified tuberculosis of central nervous system, bacteriological or histological examination unknown
C0152723 A8370461 L1706036 S1924518 014.06 014.06 Tuberculous peritonitis, tubercle bacilli not found by bacteriological or histological examination, but tuberculosis confirmed by other methods
C0152839 A8370342 L1705951 S1924399 016.74 016.74 Tuberculosis of other female genital organs, tubercle bacilli not found by microscopy, but found by bacterial culture
C0863246 A8374863 L1709134 S1929030 02.93 02.93 Implantation, insertion, placement, or replacement of intracranial foramen ovale electrodes
C0196486 A8368757 L1704697 S1922760 03.79 03.79 Salpingothecal anastomosis
C1096184 A8378635 L0043125 S5926188 066.40 066.40 West Nile virus NOS
C0042721 A8365675 L0042721 S1640927 070.9 070.9 Viral hepatitis NOS