Abstract: User interface (UI) apparatus and associated logic and methods for use with a blood analyte sensor. In one embodiment, the blood analyte sensor comprises an implantable blood glucose sensor, and the UI and associated logic are configured to receive and store user-specified parameters for operation of the blood analyte sensor and/or associated receiver. In one exemplary implementation, the UI and associated logic are configure to selectively implement various user interface regimes, including display of various analyses of current blood analyte level data and/or historical blood analyte level data, as well as prompting the user to take actions. The exemplary implementation is also optionally configured to identify and mitigate data errors.