Hi, I agree with Katie, but I also use a hyphenation if it is an adjective preceding a subject, so I type it in three different ways, such as:Patient has a follow-up visit or
The follow-up CT is scheduled
I also have this built into my macros -- "fup" for the noun version of followup, "fups" for follow up (the "s" at the end stands for separate, i.e. the two words are separate in this version) and "fuph" for follow-up (the "h" stands for hyphen).
Hope this helps.