I have been using beta for a long time and many of my patients are already codified. Really only takes me a few seconds and I can do while reviewing meds with patient (something we should do more often anyway) - I bring up the med list, right click it and ask the pt or look at their bottles/list to verify and then codify....move onto next med.
I also verify allergies - most are entered as free text until you codify them. I just use that to read each old one - type it into search and then hit add....delete/inactivate the italicized ones after I do that and then confirm allergies. It then marks in the chart that you updated which adds to the medical complexity for that date of service for coding purposes (and shows you put effort into verifying).