The problem is that because HTML is so easy to write people don't take it that seriously but for me as long as you took the time to learn how to use it then you can call yourself whatever you wish.
I guess it all depends on your definition of coder. HTML particularly isn't consider the same as PHP therefore nobody would refer a webmaster who uses html as "coder".
Here is what I think. I am telling your browser what to do with the HTML code, because it is code right? So if I am dealing with code then I'm a programmer. Remember HTML looks like Chinese to someone with no experience.
Phpmotion, I guess from your name you know some php? I hope you don't go around telling people what you just said. I mean you might fool the ones who don't know anything about computers or programming, but you are not going to fool a coder.