This paper examines the impact of financial investment and vendor interactions on the availability of electronic health record (EHR) systems to healthcare workers and patients, which in turn impacts technology usage and hospital performance. We used hospital‐level data from the American Hospital Association (AHA) IT Supplemental Survey, the AHA Annual Survey Database, and the Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) survey to test the EHR systems deployment model. The results show that both financial investment and vendor interactions significantly influence the availability of the HER in hospitals. Especially, collaboration with dominant vendors can lead to the high availability of the system and better performance.