When filing a claim with Anthem Blue Cross CA, the required documents can vary depending on the type of claim being submitted. Generally, for health-related claims, individuals may need to provide a completed claim form that includes essential information such as the member's identification number, the date of service, and details about the provider. Additionally, documentation such as itemized bills from the provider or hospital may be necessary, as these bills provide a breakdown of services received and associated costs. In some cases, supporting medical records or notes from the healthcare provider might also be required. It is beneficial to review the specific claims filing guidelines on the Anthem website, as these can provide detailed information tailored to the specific circumstances of the claim. For the most up-to-date requirements, visiting the current web page is advisable.