My organization is working on a broad and long-term effort to de-identify member PHI in non-production environments. We'd like to remove data from any columns in tables where the column contains notes/comments/text/memos/etc. that might (or might not) contain PHI. However, our QA team is concerned that they'll need to retain some of the data in those fields in order to understand why a claim was adjusted or the provider's check was reduced, etc. Does anyone have any experience dealing with this issue?