My veterinarian does acupuncture, and I've heard people at his practice raving about it.
Here is a link to the American Holistic Veterinary Medical Association. I narrowed it down to small animals, acupuncture, and Maryland, and there are 12 practices in the state. You may find other ones who aren't associated with this organization, but I'd start with this finder first.
VetFinder – Find a Holistic Veterinarian – American Holistic Veterinary Medical Association