I would suggest the usage of a format since this looks like a lookup. You can create the format and then apply it via PROC DATASETS, which is likely the fastest solution as well. If you want to share what your lkup_cpt_group table looks like we can show you how to create a format from the data. https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/proc/n1e19y6lrektafn1kj6nbvhus59w.htm
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