Which is not a method that used to ensure clean claim in Medical Office?

Incorrect claim handling.

Explanation: Incorrect claim handling is not a method that is used to ensure clean claims in a medical office. Rather, it is a problem that can lead to denied or delayed claims. Ensuring clean claims involves taking steps to ensure that claims are submitted correctly and accurately, including verifying patient information, checking for missing or incomplete information, and ensuring that the claims are submitted within the required timeframes.