Final answer:
Healthcare professional nametags should have the name and title in at least 18-type font size for clarity and readability, with a professional and approachable typeface that reflects the corporate identity.
Step-by-step explanation:
Healthcare professional nametags should display the individual's name and title in at least an 18-type font size. This is to ensure that the nametag is clearly readable by patients and other staff members from a reasonable distance. Considering the fact that nametags are part of the corporate identity of a healthcare organization, choosing the right typeface is crucial. It conveys the professionalism and approachability of the staff. While there are many options available due to digital typography advancements, the font chosen must be both legible and formal, without compromising on the aesthetic appeal.