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Unified Medical Language System® (UMLS®)

Statistics - 2021AA Release

Official Counts:
Release version:    2021AA
Release format:    RRF
Concepts:    4,441,326
Number of concept names (AUIs):    16,132,274
Number of distinct concept names (SUIs):    13,668,045
Number of distinct normalized concept names (LUIs):    12,527,715
Number of sources (distinct source families by language):    157
Number of sources contributing concept names:    218
Number of languages contributing concept names:    25

Name Count by Language:

LanguageName Count% of Metathesaurus
ENG1143467170.88%
SPA16028689.94%
FRE4340322.69%
POR4257422.64%
JPN3340642.07%
RUS2971961.84%
DUT2957581.83%
ITA2546381.58%
GER2369471.47%
CZE2042581.27%
KOR1481750.92%
HUN1102290.68%
CHI827290.51%
NOR637970.4%
POL524600.33%
TUR518690.32%
EST312800.19%
SWE304390.19%
FIN254890.16%
SCR100350.06%
GRE22900.01%
LAV14050.01%
DAN7230%
BAQ6950%
HEB4850%

Name Count by Source Restriction Level (SRL):

SRLSource Count% of Sources
0809170350.16%
11497980.93%
2221560.14%
3455742228.25%
42069361.28%
9310425919.24%
0+4 829863951.44%

Count of Atoms by Suppressibility:

Suppressibility StatusName Count% of Metathesaurus
E87340.05%
O165584810.26%
N1365484484.64%
Y8128485.04%

Source Counts by Language (from MRSAB):

LanguageName count% of Metathesaurus
ENG14666.97%
SPA94.13%
GER83.67%
FRE83.67%
DUT73.21%
POR62.75%
ITA52.29%
KOR41.83%
RUS31.38%
CZE20.92%
JPN20.92%
SWE20.92%
* 20.92%
FIN20.92%
HUN20.92%
NOR20.92%
HEB10.46%
DAN10.46%
BAQ10.46%
TUR10.46%
LAV10.46%
GRE10.46%
EST10.46%
POL10.46%
SCR10.46%
CHI10.46%

*Note: 2 sources contribute relationships which have no associated language values.

Last Reviewed: April 30, 2021