The article reflects the influence of double dispersion on mixed convection nanofluid flow over a vertical wedge saturated in porous medium. The governing higher order nonlinear partial differential equations are nondimensionalized via Lie group scaling analysis, and the gained similarity equations are solved numerically through the spectral quasi-linearization method using the Gauss-Lobatto collocation points. The appropriate results are reported here, to introduce the impact of Lewis number, buoyancy ratio, mixed convection, thermal dispersion, Brownian motion, solutal dispersion, and thermophoresis parameters on velocity, temperature, and nanoparticle volume fraction profiles, graphically. The heat and mass transfer coefficients are listed in tabular form. To verify the accuracy of present computations, residual analysis study is also depicted.