NDC numbers

Do I need to check for updates on NDC # each time we get a new shipment of drugs in the office? If not, how often to I need to check for updates?
Thanks,

Oct 21st, 2013 - nmaguire 2,606

re: NDC numbers

http://www.tmhp.com/TMHP_File_Library/NDC/NDC%20FAQ%20for%20TMHP%20com.pdf