- Invoicing, statement and dunning letter processing; rate adjudication; filling claims on behalf of patients with Medicare, Medicaid and third party insurance companies; the City will collect payment and send receipts to the Billing Agency to update patient accounts. - Invoices shall be prepared according to the rates established by the City, according guidelines and procedures established by the City and the Agency, and all applicable regulations including those for Medicare and Medicaid Services (CMC) - Obtain missing data necessary for billing through available databases, telephone queries from the receiving hospitals or from the patient, using the mail for such inquiries only if the telephone contact numbers are unavailable. - Electronically file (code) invoices to appropriate parties. - Process denials for Medicare and Medicaid according to the timelines defined by the Billing Agency and the City. - Process all refunds and over payments in a timely manner. - Establish internal controls to ensure that policies and procedures are being followed.