A 68-year-old man presents with polydipsia, polyuria and generalized fatigue for 2 weeks. There is no history of frequency, urgency, dysuria, or other urinary symptoms. He also complains of frequent episodes of “indigestion,” which he treats with large amounts of over the counter antacids and baking soda mixed with water. He was diagnosed with hypertension and dyslipidemia 5 years ago, for which he is currently on losartan and atorvastatin respectively. He drinks socially but does not smoke or use recreational drugs. He was screened for diabetes mellitus last month via a fasting plasma glucose assay, which was found to be 80 mg/dL.