The NDIS Price Code refers to the NDIA Reference Number attached to each price. Every rate has its own unique NDIA Ref. Number. This number can be set so that it is displayed in shift breakdown pages and shift information page.
Navigate to Account --> Settings. Within in settings locate the Rate NDIS Code setting.
NDIS Display when NDIS Price Code is not Selected
NDIS Price Code on Invoices
NDIS Reference numbers are displayed on invoices regardless of account settings. Thus whether or not the setting Display Rate NDIS Code has been selected or not does not affect invoicing.