is he healthy

he doesn't look that bad, but he could be fatter. It's hard to tell from just a picture, but he looks okay, just a little slim.

Agreed - he just looks a little skinny. You can usually tell by the base of his tail. You want it nice and thick - never showing any bones. If you're still unsure, then take him to a vet. Let a professional give him a once over.
Good luck!

thanks i just got a tegu too

give him a pinky or two... they will cover up those ribs. hes too skinny