sleep disorder narcolepsy A sleep disorder that involves an excessive urge to sleep at inappropriate times, such as while at work. DOID:8985 DOID:8986 EFO:0000614 ICD10CM:G47.4 ICD9CM:347.0 MSH:D009290 NCI:C84489 Narcolepsy, without cataplexy OMIM:161400 OMIM:605841 OMIM:609039 OMIM:612417 OMIM:612851 OMIM:614223 OMIM:614250 ORDO:2073 SNOMEDCT_2010_1_31:155059003 SNOMEDCT_2010_1_31:267702006 SNOMEDCT_2010_1_31:60380001 UMLS_CUI:C0027404 Xref MGI. disease_ontology paroxysmal sleep