We give our LO Vit D drops. And my doc simply said to us, "African-American babies are more prone to the deficiency due to skin tone. Let's be on the safe side until the summer when you go out more."
I do, however, think some docs give a blanket order to give babies drops. If I were you, I would ask why and see what s/he says. I think sometimes, we just accept what doctors say and then ask friends and acquaintances for the reasons why, when we should just ask the doctor why directly!
ETA: We live in NYC and its been gray for way too long. Can't wait for the sun to shine!!