"Facility-based provider" means a provider who provides health care services to covered persons who are in an in-patient or ambulatory facility, including services such as pathology, anesthesiology, or radiology.
"Health care provider" means any provider who provides health care services to covered person who are not in a facility-based setting, and includes a provider who provides health care services to a covered person based upon a referral from another provider without the knowledge of or input from the covered person.
18 Del. Admin. Code § 1317-2.0