A 78-year-old man comes to your office for a routine checkup. His medical history is significant for mild hypertension and hypercholesterolemia, for which he has been taking prescription medications...

A 78-year-old man comes to your office for a routine checkup. His medical history is significant for mild hypertension and hypercholesterolemia, for which he has been taking prescription medications for the last several years. He denies any alcohol or tobacco use, and describes his diet as “healthy.” On physical exam you find an elderly, mildly cachectic (“wasted”) man with pale conjunctiva. Lab tests reveal an Hct and iron studies consistent with iron deficiency anemia. His last Hct (1 year prior) was normal. What would you do next? A. A trial of iron and recheck Hct at next physical exam B. Repeat labs since the patient is asymptomatic C. Work up for occult GI bleed D. Bone marrow biopsy E. Hgb electrophoresis