All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Whoever claims to be a Prophet or denies the authenticity of the Sunnah or denies a verse from the Quran is a non-Muslim and went out of the fold of Islam even though he claims to be a Muslim.
There is a consensus of all the scholars about this.
Allah knows best.