Cold Nuclear Matter Effects and Heavy Quark Production in PHENIX

The PHENIX experiment uses semileptonic and leptonic decay channels, respectively, to measure open and closed heavy flavor cross sections across the rapidity range image. High luminosity data are now available for p + p, d + Au, Cu + Cu and Au + Au collisions at image, and for Au + Au collisions at image. We discuss recent d + Au results for open heavy flavor and image production, and discuss their implications for the cold nuclear matter contributions to heavy flavor production in heavy ion collisions.