This document discusses, among other things, systems and methods for predicting heart failure decompensation using within-patient diagnostics. A system comprises a patient device comprising: a communication module adapted to detect an alert status of each of one or more sensors； an analysis module adapted to: calculate an alert score by combining the detected alerts； and calculate a composite alert score, the composite alert score being indicative of a physiological condition and comprising a combination of two or more alert scores.
