Medical Back Office Assistant

I am looking for someone part time who can help with medical billing and resolution of claims that have been denied. This would require reviewing EOB's of denied claims and contacting insurance companies or gathering missing information so the claims can be resubmitted. Experience with medical insurance billing is needed. All of the billing and claims work is completed in AthenaHealth EMR so having a background in this EMR program would be beneficial. Other duties include answering phones, scheduling appointments, reviewing patient balances for upcoming appointments and reaching out to collect unpaid balances. I would also like someone to manage the credentialing for the practice and work on getting contracts with new insurance companies and maintaining the contracts we currently have. Other administrative tasks as needed. Ideal candidate will speak, read and write in English exceptionally and be able to communicate with patients, Athena's billing team/support, and insurance companies in english.