Not all data types exposed by the HealthVault web service platform are available via the HealthVault UI directly. They will be added eventually, but as HealthVault is primarily a platform and ecosystem for partner applications, the data types available to partner applications will often exceed those fully exposed in the direct UI.
However, there is a great tool that solves this problem for developers: http://xray.getrealconsulting.com/. Developer's X-Ray was developed by one of our ISV partners, Get Real Consulting, and allows you full access to the data and types in a record, for both PPE and Production.
If you haven't checked it out, take a look. If that doesn't work for you, please let me know.