As a work from home medical coder, you assess information about patients and convert their conditions and treatments into medical codes for insurance, research, billing, and medical records. You access health records remotely and apply the Healthcare Common Procedure Coding System (HCPCS), International Classification of Diseases (ICD) codes, and use other relevant coding systems. To complete your duties, you use the phone or send emails for clarification on a procedure or the diagnosis and treatment of a patient. You must ensure the completeness of records before submitting insurance claims. Your responsibilities can also include providing information for insurers so that they can approve reimbursement for services.