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We explore the intermediate dark matter mass regime of the inert Higgsdoublet model (IHDM) by extending the model with three copies of right handedsinglet neutrinos. The in built discrete $Z_2$ symmetry of the model allowsthese right handed neutrinos to couple to the usual lepton doublets through theinert Higgs doublet allowing the possibility of radiative neutrino mass in thescotogenic fashion. Apart from generating non-zero neutrino mass, such anextension can also revive the intermediate dark matter mass regime, between $W$boson mass to a few hundred GeV's where pure IHDM can not give rise to correctdark matter relic abundance. The late decay of the lightest right handedneutrino to dark matter makes it possible for the usual thermallyunder-abundant dark matter in this intermediate mass regime to satisfy thecorrect relic abundance limit. The revival of this wide intermediate mass rangecan not only have relevance for direct search experiments but also for neutrinoexperiments as the long lifetime of the lightest right handed neutrino alsoresults in almost vanishing lightest neutrino mass.

A New Viable Region of Inert Higgs Doublet Dark Matter Model with Scotogenic Extension