Welcome to the billing section on TriWest’s Provider Portal. Here, you will find information on proper billing procedures through the Department of Veterans Affairs (VA) Patient-Centered Community Care Program and Veterans Choice Program. This information may be useful to providers who are part of TriWest’s network, billing companies processing claims on behalf of providers, as well as ancillary providers—such as labs or x-ray clinics—that are fulfilling orders for Veterans utilizing VA’s community programs.