An Electronic Health Record (EHR) is a digital version of a patient’s medical history. It is kept by the provider over time, and includes clinical data such as demographics, vital signs, progress notes, medications, past medical history, laboratory and radiology reports – all of which pertain to the patient’s care under a particular provider. A key feature of an EHR is the automation of access to health information that can be shared with other health care providers. This leads to fewer medical errors and avoids duplication of certain tests that tend to cause delays in a patient’s treatment.

More info here:

Electronic Health Records (EHR) Incentive Programs – CMS.gov

What is an electronic health record (EHR)? – HealthIT.gov