Yeah, you probably want to just pick the diagnoses you want to comment on from the drop-down menu, or use the ICD-9 search. That way, they are added to the billing feature and/or the problem list.
You don't have to select them, then copy, then paste them, one at a time. Select all of them you want, and then copy and paste the whole block.
If you wanted to, you could go to the Past Encounters tab, select the previous encounter, and you would have the old problem list in a text format, and you could copy and paste the whole chunk.
For completeness sake, I will mention that you can go to the letter writer, act like you're going to type a letter on a patient, and check "Assessment" and the problem list from the last note will appear in text format.
