Ian Austin is facing possible suspension after the argument with the party’s chairman Ian Lavery.
The MP for Dudley North, who is the adopted child of a Jewish refugee, said it was a “heated discussion” about how the party tackles antisemitism.
He told BBC Radio 4 he called the antisemitism code of conduct a “disgrace”.
But he added: “Did I scream abuse at anybody? No I didn’t.”
A Labour spokesperson, responding to the incident, said the party takes all complaints extremely seriously, adding: “These are fully investigated in line with party rules and procedures”.