circadian rhythm sleep disorder circadian rhythm sleep disorder, delayed sleep phase type https://www.malacards.org/card/delayed_sleep_phase_disorder SCTID:28011000119104 DOID:0111141 sleep wake schedule disorder, delayed phase type ICD10CM:G47.21 delayed sleep phase syndrome DSPS MEDGEN:97962 A circadian sleep disorder in which the individual's internal body clock is delayed with respect to the external day/night cycle. SCTID:80623000 UMLS:C0393770 MONDO:0024377