Double clicking on the Modifier field of Enter Charges shows a list of modifiers to select from.

To add a modifier to the list, go to the Claims Lookup sub menu present under the Advanced Setup menu.

On the Search Claim Lookups screen, click on the  button to add a new Claim Lookups.

A new claim lookup window opens up for configuring Modifiers.

Enter the Type by selecting and choosing MODIFIER from the list.

Enter the new Modifier code into the fields named Code and Value. For the Code Description and Value Description, enter the description of the Modifier.

Note: Keep the User Editable field checked, if the value needs to be edited later.

Hit the Save button to add the lookup value.