Thank you so much for your response. I spent all day yesterday reformatting my code to you script. When I ran it thought, it gave me an error. I searched the error and tried some of their fixes, but with no luck. The error is:

"exists argument is not a HASH or ARRAY element or a subroutine" and it referring to your line "if (exists my $DiagCodes{$_})".

Do you know how to fix this? Since your script ran so well, I am hoping its something simple, but so far I have had no luck in figuring it out. Thank you so much for your help.

In reply to Re^4: Putting Hash values into an array by Raya4505
in thread Putting Hash values into an array by Raya4505

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