Per the International Student Admission page:
"Health insurance is required at Otterbein and available to international students through GeoBlue. At the beginning of your first term, you will be automatically enrolled in this insurance plan, and the charge for this insurance will be added to your Otterbein bill.
The GeoBlue policy is excellent and is explicitly designed to meet the needs of international students. You will be given a pamphlet describing it in detail when you arrive on campus. The current rate is approximately US $135 per month but is subject to change."
GeoBlue offers students access to a Student Member Guide, which explains the international student healthcare experience to them.