Embodiments disclosed herein provide systems and methods for modifying diameter messages to establish a communication session over a home packet data network gateway (PGW). In a particular embodiment, a method provides receiving, from a wireless communication device, a request to establish a communication session over a communication network, wherein the communication network exchanges messages using a Diameter authentication, authorization, and accounting protocol. in response to receiving the request, the method provides determining a home PGW for the wireless communication device and adding an indication of the home PGW to a Diameter message for establishing the communication session. Based on the indication of the home PGW, the method provides routing the Diameter message to establish the communication session between the wireless communication device and the home PGW.