Final answer:
Esophagogastroduodenoscopy (EGD) is the most accurate diagnostic test for peptic ulcer disease due to its direct visualization of the upper GI tract.
Explanation:
Esophagogastroduodenoscopy (EGD) is the treatment of choice for diagnosing peptic ulcer disease (PUD) due to its accuracy. During an EGD, a physician uses an endoscope to visualize the upper gastrointestinal tract, including the stomach and duodenum, for definitive diagnosis. This procedure allows for tissue examination and biopsy if necessary.
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