How can you hide the CLASS field in the order composer for a specific lab test?

To hide the CLASS field in the order composer for a specific lab test, creating an OCC (Order Composer Configuration) record without the CLASS as a display item is the correct approach. This method directly interacts with the configuration settings relevant to how orders are presented within Epic's systems.

By customizing the OCC record, you can tailor the order entry screen to meet specific requirements by selecting which fields are shown or hidden. In this case, omitting the CLASS field from the OCC ensures that it does not appear when the user is composing an order for that particular lab test, thus achieving the desired outcome of hiding it.

Other options, while they may appear relevant, do not effectively or appropriately address the requirement of hiding the field in a targeted manner. Removing the CLASS field from the database could lead to significant repercussions for data integrity and system functionality across the board. Setting the CLASS field to non-editable would still display it, rendering it visible but incapable of being modified. Limiting access to the CLASS field in system settings might restrict visibility for some users, but it would not specifically cater to the order composer display for a certain lab test without affecting others. Therefore, the OCC customization is the most precise and effective solution.