I have called Washington Medicaid several times to confirm the payer ID is 77045. They are telling me this is correct, but in the Simple Practice system, all that comes up is Arcadian Management. They are saying it should come up as Health Care Authority. Does anyone know if Simple Practice does not support electronic billing to this ID for Washington Medicaid or if I'm missing something? I'm wondering if I'm going to have to use another system to file these claims.