Dr. J in Germantown is a good LLMD. He is the LymeMD blog author. I see him and would recommend him. Almost entirely allopathic care. He takes some insurance which is generally unheard of for LLMDs. Dedicated to patients and learning about lyme.
I also see Dr. S in Reston-Herndon. I also would recommend him. He is a little more open to CAM therapy but also mainly treats with antibiotics. Does not take insurance now
Others on this board will have recommendations. I know a Dr. in Rockville is recommended and one in DC but can't comment on them.