Is it possible to change "contact type" for a batch of records rather than go into each one at a time? I have found the records I want to change, but "change contact type" does not seem to be a batch option offered.
You can not change the contact type in a batch as a contact type also has some functionality in it. For example a Individual does not have a value in the field
organization_name and an organization does not have a
So you have to change the contact type in a program, using the API Explorer or directly in the database. And for both: be careful!
The Contact Editor extension allows you to change contact types safely. It checks for potential data loss, which isn't possible with the API method or the Merge method.