How do you determine who is a vendor? Maura Kean December 24, 2018 14:35 A vendor is defined as any person or company who provides goods or services to any healthcare organization or facility. Related articles Is there a cost to the vendors to sign up for VendorProof? What happens if I don’t sign up? How long does it take to sign up? Do I have to pay a fee for all of my hospital/healthcare customers? Why do healthcare companies have to monitor vendors for exclusions? Comments 0 comments Please sign in to leave a comment.