I live in Arlington, but drive out to Fairfax to see Dr. Zakee Shabazz. He used to be in DC, but is now affiliated with Fair Oaks hospital. He's a foot& ankle surgeon vs. being a podiatrist. However, I've seen some terrible podiatrists in Arlington, and really prefer his expertise as a surgeon. I haven't had surgery and he tends to try to avoid it at all costs. I've been really happy with seeing him.
http://www.fairoaksfeet.com/