Life-changing for my son. Nothing else worked, and he couldn't read as a third grader. We got him to an ASDEC teacher, and it's been miraculous.
We got her name from the ASDEC HQ in Rockville, along with a few others, but she seemed the best match in terms of approach. Unless things have changed, the individual teacher does all the billing, so I'm not sure what the administrative issue would be.