What is used when billing outpatient claims?

When billing outpatient claims, healthcare providers typically use the Current Procedural Terminology (CPT) codes to represent the services rendered. These codes are accompanied by International Classification of Diseases (ICD) codes to indicate the diagnosis. Additionally, billing is often submitted through electronic claims forms, such as the CMS-1500 form, to insurance companies for reimbursement. Proper documentation and adherence to coding guidelines are essential for accurate billing and reducing claim denials.