We report an angular resolved photoemission study of NaxCoO2 with x 0.73 where it is found that the renormalization of the quasiparticle (QP) dispersion changes dramatically upon a rotation from ΓM to ΓK. The comparison of the experimental data to the calculated band structure reveals that the quasiparticle renormalization is most pronounced along the ΓK direction, while it is significantly weaker along the ΓM direction. We discuss the observed anisotropy in terms of multiorbital effects and point out the relevance of magnetic correlations for the band structure of NaxCoO2 with x 0.75.