Top 10 Denial Codes in Medical Billing: The Ultimate Guide Denial codes refer to specific codes healthcare insurance companies assign to indicate problematic insurance claims. These codes briefly describe the reasons and remark codes that provide insights into why patients’ treatment expenses are unable to be covered under the existing circumstances. These error codes provide descriptions that are causing claim denials. https://ensurembs.com/top-10-denial-codes-in-medical-billing-and-coding/