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Loading MedDRA code set files

Updated on April 23, 2021

The Foundation supports the intake of all MedDRA files including base and change files.

Pega Foundation for Healthcare

MedDRA consecutive release files contain only records that have changed since the last MedDRA release. Each file consists of records containing a version date for the new release and an action code designating that the record was either “A” – added, “D” – removed, or “M” – modified.

Below is the list of standard Base and Change files:

Base FileChange file
hlgt.aschlgt.seg
hlgt_hlt.aschlgt_hlt.seq
hlt.aschlt.seq
hlt_pt.aschlt_pt.seq
llt.ascllt.seq
mdhier.ascmdhier.seq
pt.ascpt.seq
soc.ascsoc.seq
soc_hlgt.ascsoc_hlgt.seq

Below is the list of file listeners:

File Listener

For base files

File name

File Listener

For Change files

File name
SOCBaseSoc.ascSOCChangeSoc.seq
MDHIERBaseMdhier.socMDHIERChangeMdhier.seq
LLTBaseLlt.ascLLTChangeLlt.seq
PTBasePt.ascPTChangePt.seq
HLT_PTBaseHlt_pt.ascHLT_PTChangeHlt_pt.seq
HLTBaseHlt.ascHLTChangeHlt.seq
HLGTBaseHlgt.ascHLGTChangeHlgt.seq
HLGT_HLTBaseHlgt_hlt.ascHLGT_HLTChangeHlgt_hlt.seq
SOC_HLGTBaseSoc_hlgt.ascSOC_HLGTChangeSoc_hlgt.seq
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