What does the -99 modifier indicate?

The -99 modifier is used to indicate that multiple modifiers are being appended to a single CPT code. This is particularly important in billing and coding because it signifies that a procedure may involve different aspects or complexities that require distinct modifiers to accurately describe the nature of the services provided. By using the -99 modifier, it allows for clarity in the claim being submitted, ensuring that each modifier is recognized and understood as pertaining to the same procedure.

In contrast, the other options refer to different concepts in medical coding and billing. Additional services or prior authorization do not specifically relate to the use of multiple modifiers. Similarly, informed consent pertains to a different aspect of patient care and documentation, not directly related to modifiers. Understanding the specific function of the -99 modifier is crucial for accurate coding and to prevent claim denials or issues with reimbursement.