What information must be documented to support the use of a modifier?

To support the use of a modifier, the medical record must clearly document the circumstances that warrant its application. This documentation is essential as modifiers provide specific context that alters the original procedure code. Modifiers indicate that a service or procedure has been performed differently than what is normally expected, and this must be backed up by detailed clinical information in the patient's medical record. Without such documentation, the use of a modifier could be considered unsupported, potentially leading to issues with claims processing or reimbursement.

The other answers do not provide relevant requirements for modifier documentation. The necessity for the modifier is not related to insurance policy language or patient explanation; instead, it rests on the clinical evidence recorded. Additionally, the use of modifiers is crucial when multiple services are billed, as they clarify the distinct aspects of the services provided.