Final answer:
The highest priority for the discharge planner is the patient who will require home IV antibiotics for the next 6 weeks.
Step-by-step explanation:
The highest priority for the discharge planner would be the patient who will require home IV antibiotics for the next 6 weeks (option a). This patient has a medical condition that requires ongoing treatment and monitoring at home, which is typically more complex and requires coordination with healthcare providers. In contrast, the other options (b, c, and d) involve patients who may need medication management or further care, but do not have the same level of immediate medical needs as the patient requiring home IV antibiotics.