A system for monitoring patient physiological data is disclosed herein. The system comprises a wireless patient monitoring device with a known device identity having a first sensor for retrieving patient physiological data, and a data reception device comprising a processor for processing data received via a wireless communication protocol from the patient monitoring device and a memory for storing the known patient monitoring device identity, the memory being connected to an identity input device for entering the known patient monitoring device identity. The data reception device can receive and process identification data to obtain a patient monitoring device identity and to compare said identity with the stored known identity. When the identity matches, the data reception device is allowed to receive and process the retrieved patient physiological data. The patient monitoring device comprises a visual identification and the identity input device comprises an optical sensor for retrieving the visual identification.