This study examined how variations in the source and type of patient health data affected health care providers' perceptions of the trustworthiness and usefulness of the data. Overall, respondents (n=107) reported moderate to high levels of trust and usefulness of health status data from all sources. Technology sources were rated as more trustworthy than traditional, non-technology sources (paired t=-2.84, p<0.006). However, there was no significant difference between technology sources and non-technology sources (paired t=-1.63, p<0.108) in perceived usefulness for clinical decision making.