We present a brief summary of the parallel Session IV, “Neutrino masses,
states and interactions”, of the Neutrino Oscillation Workshop 2022. Topics covered in this session include recent experimental and theoretical results on searches for neutrinoless double beta decay, coherent elastic neutrino-nucleus scattering, developments in measurements of the absolute neutrino mass scale and phenomenological implications of: neutrino nonstandard interactions, heavy neutral leptons, nontrivial neutrino electromagnetic properties and radiative models of neutrino mass generation.