What documents is considered the source document for insurance claim data ledger daysheet CMS-1500 Superbill?

The source document for insurance claim data ledger daysheet CMS-1500 Superbill is the patient's medical record. This includes all of the documentation that pertains to the patient's care, such as the initial evaluation, progress notes, laboratory and imaging studies, and treatment plans. The medical record is used to complete the CMS-1500 Superbill, which is the form that is used to submit claims to insurance companies.