I noticed on the Care Request Item object that although there were 2 look up fields to the Healthcare Procedures object, that neither showed up in the list of fields when adding a formula.  When I add a third lookup custom field to the Healthcare Procedures object, I am able to see it when making a formula.  I don't think this is proper behavior with Salesforce.  I added a file of screen shots showing the 3 look up fields and what shows and doesn't show in the formula list.  Any thoughts on this Salesforce?  @Zach Bacon @* Salesforce Health Cloud * 

Thanks