  We consider an inert Higgs doublet (IHD) extension of the Standard Model
accompanied with three right handed neutrinos and a dark sector, consisting of
a singlet fermion and a scalar, in order to provide a common framework for dark
matter, leptognesis and neutrino mass. While the Yukawa coupling of the right
handed neutrinos with IHD (having mass in the intermediate regime: 80-500 GeV)
is responsible for explaining the observed baryon asymmetry through
leptogenesis, its coupling with the dark sector explains the dark matter relic
density. The presence of IHD also explains the neutrino mass through radiative
correction. We find that study of the high scale validity of the model in this
context becomes crucial as it restricts the parameter space significantly. It
turns out that there exists a small, but non-zero contribution to the relic
density of DM from IHD too. Considering all the constraints from dark matter,
leptogenesis, neutrino mass and high scale validity of the model, we perform a
study to find out the viable parameter space.
