I believe I called in about this issue awhile ago and I believe you are stuck. I don't think you can delete old appt types if they were ever used by a patient. We added zzz to all appt type descriptions as a way of making them inactive and have users stop using that type.
If you are really desperate to clean this up, I think you can run a appt profile report to fine all appts with a certain type in a date range. You could in theory change the appts to a different type but that I wouldn't recommend that option.
If anyone has an actual option on this, please share.
