Final answer:
The hospital will be reimbursed by Medicare for an elderly patient admitted with pneumonia based upon the DRG for pneumonia.
Step-by-step explanation:
The hospital will be reimbursed by Medicare for an elderly patient admitted with pneumonia based upon the DRG for pneumonia. DRG stands for Diagnosis-Related Group and is a payment system used by Medicare to classify and reimburse hospitals for inpatient services. Each DRG is assigned a fixed payment amount based on the average cost of treating patients within that group.