The applications of the coherent potential approximation to ferromagnetic disordered alloys of transition metals are reviewed in the light of recent theoretical developments. The CPA calculation which utilizes the Hartree-Fock approximation for determining the potential of each atom can elucidate the variation of the atomic magnetic moment and the electronic specific heat with concentration in the cases where the magnetic state of each atom is well defined. Alloys such as Ni1-xMnx and Ni1-xFex demand an extension of the approach to take into account the existence of two magnetic states of an atom and also the effect of the nearest neighbour configuration on the magnetic state of a given atom. Possible extensions of the Hartree-Fock-CPA method to meet such cases are discussed