It does not make sense to squash multiple meaningful pieces of data into a single “|”-separated attribute, because you’re naturally allowed to have multiple attributes for a single provider.
So you should have one attribute specifically for this functionality, like “Available for appointments” or “Supports appointments”.
Also, do not use the term “Role” because “Provider Role” has meaning in the domain and it will be introduced in a future OpenMRS verson: https://issues.openmrs.org/browse/TRUNK-4791
Which provider management page is this? One in the OpenMRS admin UI? If so, that page is dynamic/generic, and should not be hardcoded to support a specific Bahmni attribute type. (But I guess that if you create a provider attribute type with datatype=boolean, this should automatically behave correctly.