Creating Compatibility with other mods

I am currently working on a mod that adds a new decorative wood block for each wood type. I want to be able to add compatibility between other modded wood types. Not too long ago the "is mod id () loaded" block was added and I wanted to know if there was any way to only have certain blocks appear in the creative inventory or even register in the game if a certain mod id is loaded. Is there any way to do this currently?