Sara,
I think I'm understanding a little better.
To answer your last question first, yes, global periods follow the patient wherever your provider see's the patient, e.g., does not matter whether the patient is seen in the hospital, office or in an outpatient area of the hospital, etc.
Also, unless his E/M, aka office visits/subsequent care, is not related to the wound care, or goes above and beyond what normal wound care would entail, they are not separately billable.
With that being said, I am still going to recommend verifying that the requesting providers intent is for your provider to perform a consult and not to simply take over the care of the problem. Especially with consultations being such a highly scrutinized and sensitive issue with carriers, CMS, and OIG right now. It will be well worth the reduction in receivables in the long run, to not be found billing a consult in error and having to refund the money originally paid, pay additional fines and pay triple the amount of what was originally paid on each claim.
I know that was a lot of information, and perhaps you are well educated in that area. Better too much information than not enough.
Hope that helps!
Kris