Column A = Account Number
Column B = Patient Name
Column C = Account Number
Column D = Patient Name

I need to know which account numbers in Column A are listed in Column C. If
they are listed, I need the word female to display. I have tried the
following. IF(ISNUMBER(C1,A1:A17305)),"FEMALE",""). The problem is that the
range keeps changing as I copy and past the function. I need to search the
same range for each account. Please help.

Thanks.