If you have collision coverage on your vehicle, your insurance will pay for damages to your vehicle regardless of who is at fault. If you have Medpay coverage on your policy, your insurance company will pay for your injuries up to your Medpay limits, regardless of fault. If the other person is indeed 100% at fault, and you don't carry medpay, but you do carry uninsured/underinsured bodily injury coverage, you can claim your injuries through that coverage, but it does not pay the same way as Medpay does.

This is all assuming that this accident occurred in Colorado and the other driver is 100% at fault.