Providing to a person a health service for a health condition includes receiving, from a health sensor of a mobile health device over an initial period, a plurality of initial values of health metrics of the person associated with performance of the health service, determining, based on the initial values, baseline values of the health metrics for the person, receiving, from the health sensor at a time after the initial period, an additional value corresponding to at least one of the health metrics, and determining whether the additional value represents an irregularity with respect to the baseline values for the person. Providing to a person a health service for a health condition may also include, if it is determined that the additional value represents an irregularity with respect to the baseline values, communicating the irregularity to a provider of the health service.