Gifted Issues Discussion homepage Forums Twice Exceptional What are the criteria for a dysgraphia diagnosis?

It's a rather lengthy piece but might be worth a look:

http://dyslexia.yale.edu/CommentsDSM5ColkerShaywitzSimon.pdf

P.13 discusses the issue of having to be "well below," which must be met to be given the SLD diagnosis.

Anyway, given that your DS already has the DCD diagnosis, that should qualify him for SPED and related services under OHI if the eligibility team agrees that the services are needed for him to receive FAPE.