This visit was to Dr. Cho, my primary care doctor. There's no reason listed but I was sent for lab work, specifically a "hematocrit" test. The hematocrit test (or HCT) is a simple test that measures your red blood cell count. Since there's no reason given and no results listed, I would assume it's related to my head or maybe because I was anemic (or potentially anemic). Either way, things seemed to be just fine.