Final answer:
Patient advisors function at the highest level of recovery and post-care when engaging with patients.
Step-by-step explanation:
The highest level at which patient advisors function when engaging with patients is at the level of recovery and post-care. Patient advisors are individuals who have personal experience with the healthcare system and work to enhance the patient experience by providing feedback, guidance, and support to patients and their families. In the context of recovery and post-care, patient advisors may provide insights into the patient's post-surgery care, rehabilitation processes, and communication with healthcare providers.