What is an example of a procedure that may require a modifier?

A procedure that is altered by the circumstances of the encounter may require a modifier because modifiers provide additional context or specificity about the procedure performed. They indicate that a service or procedure was altered in some way but not changed in its definition or code. This can include different situations such as whether the procedure was performed bilaterally or whether it involved different sites. By using a modifier, healthcare providers can convey important information about the encounter that may affect billing and reimbursement, ensuring accurate representation of the services provided.

The other options do not directly relate to the need for a modifier as they lack the essential elements of indicating that the procedure was notably impacted by the scenario in which it was performed. For example, performing a procedure for the first time does not imply a change in circumstances that would require a modifier, while performing a service outside of the normal facility may not inherently alter the procedure itself. Additionally, a procedure with no associated risks does not imply any changes were made that would necessitate further clarification through a modifier.