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Unified Medical Language System® (UMLS®)

2012AB National Drug Data File Source Information


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Attribute Name Description Count (MRSAT.RRF)
NDC National Drug Code corresponding to a clinical drug (e.g. 000023082503) 183016


  • Attributes included every discrete piece of information about a concept, an atom, or a relationship that is not part of the basic Metathesaurus concept structure or distributed in one of the relationship files.
  • Attribute Names (ATN) are based on source documentation or NLMs understanding of the source.
  • Sample attribute values (ATV) are provided for each ATN in the source.
  • Sample data highlight examples of ATNs and Attribute Values (ATV) in MRSAT.RRF.
  • See Metathesaurus Documentation for a complete list of attribute names.
  • See Section 2.5 of the UMLS Reference Manual for more information on attributes in the UMLS Metathesaurus.

Sample Data


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C0352681 A10087173 L5325136 S6776495 AUI 007685 NDC 55084038060 ERYTHROMYCIN BASE 2 % TOPICAL LOTION (ML)
C0688138 A10128668 L1319076 S6808720 AUI 002537 NDC 63739004601 CARBIDOPA/LEVODOPA 10 mg-100 mg ORAL TABLET
C0688143 A10128781 L1329013 S6808797 AUI 004663 NDC 55175408703 CARISOPRODOL 350 mg ORAL TABLET
C0688334 A10130592 L1333576 S6810075 AUI 011668 NDC 58016053030 CIMETIDINE 800 mg ORAL TABLET
C0688374 A10131000 L1318308 S6810350 AUI 004561 NDC 66267074890 CLONAZEPAM 1 mg ORAL TABLET
C0688497 A10082793 L1329451 S6773151 AUI 006789 NDC 54569032306 DEXAMETHASONE 4 mg ORAL TABLET
C0688686 A10085217 L1321374 S6774922 AUI 009223 NDC 00359118054 DOXYCYCLINE HYCLATE 100 mg ORAL TABLET
C0688929 A10089935 L5920842 S6778660 AUI 003691 NDC 52446019528 FLURAZEPAM HCL 15 mg ORAL CAPSULE (HARD, SOFT, ETC.)
C0688930 A10089937 L5924840 S6778661 AUI 003692 NDC 53002050706 FLURAZEPAM HCL 30 mg ORAL CAPSULE (HARD, SOFT, ETC.)
C0689079 A10094835 L1331645 S6782567 AUI 008183 NDC 17022477406 HYDROCHLOROTHIAZIDE 50 mg ORAL TABLET
C0689173 A10096490 L1329995 S6783881 AUI 008348 NDC 00247008035 IBUPROFEN 400 mg ORAL TABLET
C0689173 A10096490 L1329995 S6783881 AUI 008348 NDC 55175304200 IBUPROFEN 400 mg ORAL TABLET
C0689175 A10096497 L1333583 S6783885 AUI 008350 NDC 58016024345 IBUPROFEN 800 mg ORAL TABLET
C0689533 A10102370 L1332354 S6788252 AUI 004654 NDC 68030402606 METHOCARBAMOL 500 mg ORAL TABLET
C0689559 A10102567 L1326525 S6788383 AUI 000355 NDC 49648162701 METHYLDOPA/HYDROCHLOROTHIAZIDE 250 mg-25 mg ORAL TABLET
C0689728 A10105006 L1327534 S6790312 AUI 008360 NDC 55887008590 NAPROXEN 250 mg ORAL TABLET
C0689766 A10106105 L5918230 S6791057 AUI 000568 NDC 17236092330 NIFEDIPINE 10 mg ORAL CAPSULE (HARD, SOFT, ETC.)
C0690031 A10110507 L5918233 S6794421 AUI 008370 NDC 61392039832 PIROXICAM 10 mg ORAL CAPSULE (HARD, SOFT, ETC.)
C0690424 A10116920 L1332412 S6799440 AUI 009402 NDC 11289211905 SULFASALAZINE 500 mg ORAL TABLET