Sofia has a new job working in the billing department for a cardiac surgery practice. She is learning about coding surgeries and associated procedures that occur during the surgery. Currently, she is working on coding a coronary artery bypass for a patient. Sofia refers to the surgical package in the current procedural terminology (CPT) manual for the necessary codes. While reviewing the section in the manual, she comes across a service that she had erroneously included in the surgical package. Which of the following is most likely a service that Sofia should have coded separately?