No, but you can find the case that one Muslim will declare that another Muslim is not a true one and so in reverse. We are doing a variant of no True Scotsman.
hmmm. I'm going to propose (admittedly an oversimplification), that there are two categories of beliefs that Muslims hold, concerning Islam:
1 - A small set of beliefs that EVERY Muslim agrees to.
2 - A much larger set of beliefs for which Muslims disagree.
To me, if there are no beliefs in category one, then the term "Muslim" has no meaning.