one simple solution would be to run a loop and then match the resulting files from within the directory. could be something like
for numeric in ` cat my_file.csv`
do
echo "Going for $numeric"
ls -l /my_path/my_loc/DEV/RPD10/CPD25/WFM/RK_WFM/OUT/*/CPD25_"$numeric".pdf
if [[ $? -eq "0" ]]; then
echo "$numeric Found"
else
echo "$numeric Not Found"
fi
done
Remember you'll have to fulfill the "*" and "CPD25_" variables accordingly, where they need to differ from this code.