What indication is given when an audit reveals that modifiers have been appended to a procedure code?

When modifiers are appended to a procedure code, they generally indicate that the procedure has been altered in some way that doesn't change its fundamental definition or code. Modifiers provide additional context or information about the service provided, allowing for more precise billing and documentation. For instance, a modifier might indicate that a procedure was performed bilaterally or that it was an emergency procedure.

This nuanced alteration is crucial because it clarifies to insurers the specifics of the service rendered without suggesting that a new, distinct procedure is being reported. The integrity of the original procedure code remains intact, which is why the correct option is that the procedure was altered but not redefined.

In contrast, the other options may imply different meanings or contexts that are not directly connected to the application of modifiers. While each option may reflect aspects of medical coding and auditing, they do not capture the specific role of modifiers as accurately as the selected choice does.