Babatunde Paul Odeyemi disappeared after receiving a test result related to a serious illness from a hospital.
Report says that the missing man was last seen on Wednesday, December 7, 2016, at the General Hospital in Newham where he received the result.
The police has called on the public via its Twitter to call the country's emergency number if they have sightings of Odeyemi.
A tweet posted on Saturday, December 10, 2016 reads, "Babatunde Paul Odeyemi, 54 is missing from Newham General Hospital. Pls call 101 if seen."
Follow-up posts were made till the early hours of Monday, but no information of his whereabouts was found as at the timing of this report.