Macro to Search and Replace Text from another Column

Registration date
Monday July 15, 2013
Last seen
July 18, 2013
I receive an Excel file each month that has the following columns

Group Name, DOS, Clinician Rpt Name, (rest of columns have patient information)

These lists have over 500 different Clinician Rpt Names to choose from. Some of them need to be deleted, the rest need to have the name correctly written. I have a separate list that looks like this:

Column A | Column B
Abbor , John |
Smith , Frank | Smith, Frank
TERRY JOHN | John, Terry
Johnson , Mary MD | Johnson, Mary

So, column A is the list of what the names look like on the excel file we're sent each month. Column B is what they SHOULD look like. If there is a blank it needs to be deleted.

Is there a way to make a macro where the Clinician Rpt Name will be compared to Column A on the list, and changed to column B on the list?