An integrated analyte monitoring assembly, comprising: a sensor electronics assembly (110, 1270) including: an analyte sensor (101, 1020, 1280); and sensor electronics (102, 1030) including a power supply and comprising: an activation switch operatively coupled to the power supply and the analyte sensor (101, 1020, 1280); and a controller unit in electrical contact with the analyte sensor and the activation switch having one or more programming instructions stored therein for execution, the controller unit configured to process one or more signals received from the analyte sensor when the activation switch is triggered; and an insertion device including: a housing; an introducer needle coupled to the housing configured to move between a first position and a second position; and a bias mechanism operatively coupled to the housing and configured to automatically retract the introducer needle from the second position to a retracted position entirely within the insertion device housing, wherein the sensor electronics assembly is configured for communication with a remote device (104, 105, 106, 222, 260) and is retained entirely within the housing of the insertion device prior to the introducer needle movement from the first position to the second position. a sensor electronics assembly (110, 1270) including: an analyte sensor (101, 1020, 1280); and sensor electronics (102, 1030) including a power supply and comprising: an activation switch operatively coupled to the power supply and the analyte sensor (101, 1020, 1280); and a controller unit in electrical contact with the analyte sensor and the activation switch having one or more programming instructions stored therein for execution, the controller unit configured to process one or more signals received from the analyte sensor when the activation switch is triggered; and an analyte sensor (101, 1020, 1280); and sensor electronics (102, 1030) including a power supply and comprising: an activation switch operatively coupled to the power supply and the analyte sensor (101, 1020, 1280); and a controller unit in electrical contact with the analyte sensor and the activation switch having one or more programming instructions stored therein for execution, the controller unit configured to process one or more signals received from the analyte sensor when the activation switch is triggered; and an activation switch operatively coupled to the power supply and the analyte sensor (101, 1020, 1280); and a controller unit in electrical contact with the analyte sensor and the activation switch having one or more programming instructions stored therein for execution, the controller unit configured to process one or more signals received from the analyte sensor when the activation switch is triggered; and an insertion device including: a housing; an introducer needle coupled to the housing configured to move between a first position and a second position; and a bias mechanism operatively coupled to the housing and configured to automatically retract the introducer needle from the second position to a retracted position entirely within the insertion device housing, a housing; an introducer needle coupled to the housing configured to move between a first position and a second position; and a bias mechanism operatively coupled to the housing and configured to automatically retract the introducer needle from the second position to a retracted position entirely within the insertion device housing, wherein the sensor electronics assembly is configured for communication with a remote device (104, 105, 106, 222, 260) and is retained entirely within the housing of the insertion device prior to the introducer needle movement from the first position to the second position.