It is possible to put down a provisional diagnosis and to include hypotheses about other diagnoses that might fit as "Rule out" (R/O) diagnoses. With ongoing assessment and treatment, a mental health provider can and should update the diagnosis as more information becomes available.

Medical doctors treating medical disorders, however, well....unless they had a great deal of supportive evidence, I don't think they should be diagnosing a mental disorder. Particularly if it's not relavent to the medical treatment. And if it were me, I'd make it a provisional diagnosis or an NOS versus specific. And I'd definitely avoid putting down any Axis II disorders unless it's been confirmed by someone who knows the client much much better. It's impossible, imo, to determine whether someone has a relatively rigid pattern of behavior in one visit.

gg