Is there a way to get the "id" of a picklist value through the API?  We are using picklist values in an external system and when a picklist value is updated, would like to "push" this updated value to the external system via the id.

Looking at the edit page, it seems it may be possible to get at the id, but I do not see this available through the API.  Is there a way to get this id value?

Examples through the edit screen:
picklist_masteredit.jsp?id=01J400000088LJZ
picklist_masteredit.jsp?id=01J400000088LJa

Thanks!