A system for monitoring the health of a patient, the system comprising: a housing configured to be implanted within a human patient, the housing containing a reservoir; a septum adjacent the reservoir and configured to receive a needle therethrough for delivery of a fluid to the reservoir; a sensing element carried by the housing and configured to obtain physiological measurements; and at least one controller configured to be communicatively coupled to the sensing element, wherein the at least one controller is further configured to: obtain the physiological measurements via the sensing element while the housing is implanted within the patient; determine at least three physiological parameters based on the physiological measurements, wherein the at least three physiological parameters includes (a) a temperature parameter, (b) an activity level parameter; and (c) at least one of a heart rate parameter and a respiratory rate parameter; compare each of the at least three physiological parameters to a predetermined threshold, including comparing the temperature parameter to a predetermined temperature threshold; comparing the activity level parameter to a predetermined activity level threshold; and comparing the at least one of the heart rate parameter and the respiratory rate parameter to a predetermined heart rate threshold and a predetermined respiratory rate threshold,respectively; and based on the comparison, provide an indication that the patient is septic. a housing configured to be implanted within a human patient, the housing containing a reservoir; a septum adjacent the reservoir and configured to receive a needle therethrough for delivery of a fluid to the reservoir; a sensing element carried by the housing and configured to obtain physiological measurements; and at least one controller configured to be communicatively coupled to the sensing element, wherein the at least one controller is further configured to: obtain the physiological measurements via the sensing element while the housing is implanted within the patient; determine at least three physiological parameters based on the physiological measurements, wherein the at least three physiological parameters includes (a) a temperature parameter, (b) an activity level parameter; and (c) at least one of a heart rate parameter and a respiratory rate parameter; compare each of the at least three physiological parameters to a predetermined threshold, including comparing the temperature parameter to a predetermined temperature threshold; comparing the activity level parameter to a predetermined activity level threshold; and comparing the at least one of the heart rate parameter and the respiratory rate parameter to a predetermined heart rate threshold and a predetermined respiratory rate threshold,respectively; and based on the comparison, provide an indication that the patient is septic. obtain the physiological measurements via the sensing element while the housing is implanted within the patient; determine at least three physiological parameters based on the physiological measurements, wherein the at least three physiological parameters includes (a) a temperature parameter, (b) an activity level parameter; and (c) at least one of a heart rate parameter and a respiratory rate parameter; compare each of the at least three physiological parameters to a predetermined threshold, including comparing the temperature parameter to a predetermined temperature threshold; comparing the activity level parameter to a predetermined activity level threshold; and comparing the at least one of the heart rate parameter and the respiratory rate parameter to a predetermined heart rate threshold and a predetermined respiratory rate threshold,respectively; and based on the comparison, provide an indication that the patient is septic.