To provide a terminal apparatus, a base station apparatus, a communication method, and an integrated circuit which are capable of efficient communication. The terminal apparatus includes a receiver configured to receive a message for adding a data radio bearer (DRB) including information of an EPS bearer identity, and a processing unit configured to notify to a NAS layer that the DRB indicated by the message is established and an EPS bearer identity of the established DRB in a case that the message does not include first information, and not to notify to the NAS layer that the DRB indicated by the message is established and an EPS bearer identity of the established DRB in a case that the message includes the first information.