On a Prescription there are 2 checkboxes for ICDs: 'Include ICDs on Print/Esend' and 'Prompt for ICD on Print/Esend'. 

If an ICD has been added to a prescription and the 'Include ICDs on Print/Esend' preference is checked the the ICD will be included on the prescription. 

If the user wants to be prompted to add an ICD to a prescription they should check 'Prompt for ICD on Print/Esend'.

These preferences should only have the be checked once per user and the system will remember the settings selected.