Steps
Create a new policy to validate your custom DME.
On the Policy Designer page, in the left pane, select Design.
The Design workspace appears.
On the workspace heading, in the Inputs section, select
A new Entity node appears in the Design workspace.
Select the new Entity node, and then, in the Properties box, in the Family ID field, select the family of the custom DME you are validating
Using the Input Entity nodes, perform all required validations.
When using the Is Null node, enter a value of -1. Using an Equal node, compare the Is Null node output to -1.
Select
The custom DME validation policy is saved.