Going back a few years here, but there was a time when FCPS was pushing (requiring) us to go to CSB for help with our special ed kid (behavioral issues). It was a "go now or you can't come back to school" thing for emergency services, not make an appointment and discuss services.
Our experience was that we'd get there for intake only to hear "I don't know why FCPS keeps telling parents to come here - this isn't what we do."
Nice, well meaning people who tried to find us appropriate resources (not that they could find anything we hadn't already tried).
That said, offerings may have changed, but, I'd advise speaking with them about how they can help rather than assuming that since you were referred there that they must be able to help.