We present a search for a simplified supersymmetric model with pair-produced light supersymmetric bottom quarks decaying to neutralinos. Higgs-type neutralinos (Higgsinos) decay to the Higgs boson and LSP, with at least one Higgs bo son decaying to a diphoton system. Events with at least two $b$-jets and a photon pair in the Higgs-tagged invariant mass window are considered. In $36.2$ $\textrm{fb}^{-1}$ of proton-proton collision data collected at the CMS experiment at $\sqrt{s} = 13$ TeV, we find no evidence of signal and set lower limits on the production of the bottom squark at a 95\% confidence level at masses of below 350 GeV, with a Higgsino mass of 150 GeV or less.