Hourly wage for insurance coordinator?

For those of you who are in network with insurance and have someone in this position in your practice, what do you pay them hourly? Information online gives an extremely wide range and seems to come more from hospital-based positions. This person is separate from the receptionist and does not answer phones, schedule appointments, or check patients in or out. They submit all claims, process all insurance checks/EOBs, follow up on outstanding claims, and answer patient questions regarding their bills that the receptionist is unable to answer.