Quoting Landen Wyatt's Mama:" Im concerned whether he will be diagnosed with this or not. My son is almost 13 months and there's just ... [snip!] ... independent and likes to do things himself. He says a few words. And autism does run in my famliy.. When should he be tested?"
They will rarely diagnose a child that young. Usually 18 months is the earliest. If he's behind they can offer therapy for specific issues, but it's really rare (meaning only really obvious and severe cases) to diagnose that early that I've seen.