Kiptum's four-year ban commences from that date and all his results going back to October 13, 2018 - including a half marathon world record (58 minutes and 18 seconds) that he had set in Valencia later that month - have been disqualified.
Image credit: Eurosport
His time was five seconds better than the previous mark set by Eritrea's Zersenay Tadese in Lisbon in 2010.
Kiptum's compatriot Geoffrey Kamworor broke the world half-marathon record by 17 seconds in Copenhagen in September.
Kenya is known for its middle and long-distance running pedigree but has suffered damage to its reputation due to a number of doping violations in recent years.