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The Standard Model gauge symmetry is extended by $U(1)_{B-L}$ which whenspontaneously broken leads to residual $\mathbb{Z}_4$ symmetry. $U(1)_{B-L}$gauge symmetry made anomaly free by introducing exotic SM singlets withcorresponding $U(1)_{B-L}$ charges of $13$, $-14$, and $15$. $\mathbb{Z}_4$symmetry ensures the Dirac nature of neutrinos, simultaneously stabilizing darkmatter. Dirac neutrino mass is generated through scotogenic scenario. Darkmatter, direct detection, cosmological constraints, and collider constraintsanalysis is performed. $\mathbb{Z}_4$ symmetry predicts the exact absence ofneutrinoless double beta decay ($0\nu 2\beta$) and gives a prediction for anenhanced neutrinoless quadruple beta decay ($0\nu 4\beta$) via which this modelcan be tested. Model allows for Majorana dark matter as well as for long-liveddark matter candidates.

Radiative Dirac Neutrino Mass with Dark Matter and it's implication to $0\nu 4\beta$ in the $U(1)_{B-L}$ extension of the Standard Model