A CPC coder is a certified professional coder that typically works in medical billing. In the healthcare industry, there are several coding systems that insurance companies use to describe a given diagnosis, procedure, or record. As a CPC, your responsibilities involve ensuring that all coding is accurate and in compliance will laws and facility guidelines. This helps the department make sure that patients receive the correct billing information. Your other duties may include occasionally interacting with patients, answering physician inquiries, and communicating with insurance agencies.