3821709 - Why does my HCP attendee not have an NPI (National Provider Identifier) number?

I'm having trouble adding an attendee (attendee is completing his residency, so not yet a full fledged medical doctor).
Adding him as an HCP (Health Care Provider) attendee for a meal expense, the NPI number (the National Provider Identifier number for a given individual doctor) will not display and I cannot save the expense without that number entered in the attendee listing.
 

Attendees who are Health Care Providers (HCP) are subject to the Sunshine Act for documenting attendee status. There is a field for the NPI number (the National Provider Identifier number for the individual doctor) which is required for medical doctors which does not display a number for this attendee; the admin cannot save the expense without the number entered in the required field for the attendee listing. , KBA , CON-CA-ADM , Administration , Problem