High energy heavy ion collisions resulting in the production of Quark Gluon Plasma (QGP) provide an experimental system where the effects of multiple partonic interactions (MPI) can be studied. Small heavy ion systems such as d+Au collisions are of particular relevance to studying MPI because MPI effects can be better isolated. We can examine to what degree MPI plays a role in the initial collision geometry by measuring flow coefficients in small collision systems. We can see how MPI effects contribute to the nuclear modification factors used in determining centrality classes in small collision systems. In this talk we will present new results from the PHENIX and STAR experiments using recently collected p+p, p+A, 3He+Au, and d+Au collision data @ 200 GeV on the topics of azimuthal anisotropy of charged hadrons and nuclear modification factors in small collision systems.