drchrono has added the feature to select a remark code based on the details received on the EOB. There are a few adjustment codes for which action varies depending on the remark code.
Go to Billing > Live Claims Feed
Choose the desired patient
Click the Visit Date
Click on the + icon (If this is not appearing for you click the +Add Line Item first)
Select the desired Remark Code
Click Verify & Save and you're finished!