We noticed that copay type was bound extensibly to a list that contained RX. For Rx, co payments are most often based on a Tier, i.e. Tier 1 RX copay, etc. Because Rx is on the list, we have to use it but it could be confusing. For example, we might use Rx 3 timex with an additional code of the Tier. Consider how multiple tier Rx copays should be modelled please.