Go to Advanced Setup from the main menu and choose Claim Lookups.

To add a new look up value, when the Search Claims Lookups screen opens, click on the button on the top right corner.

Select the Lookup Type.  Click on the flutter icon (3-dot button beside ‘Type’ field) to list all available Claim lookup Types. Select the required type and fill in other fields:

Code, Code Description, Value, Value Description. Finally click on Save.