EHR (Electronic Health Record)

An Electronic Health Record (EHR) is the digital patient chart that has become the operating system of U.S. healthcare delivery. The EHR captures medical history, diagnoses, medications, treatment plans, immunization records, allergies, lab results, and imaging — and increasingly powers clinical decision support, billing, quality reporting, and patient communication.

The U.S. market consolidated around two dominant vendors: Epic Systems (the unquestioned market leader, used by most large U.S. health systems) and Oracle Health (formerly Cerner, acquired by Oracle in 2022). Athenahealth, Veradigm (formerly Allscripts), MEDITECH, and eClinicalWorks operate in adjacent tiers serving ambulatory, community hospital, and small-practice markets.

EHR vendor positioning drives healthcare-IT retrieval inside AI engines. Buyer queries like "Epic vs Cerner," "best ambulatory EHR," and "EHR interoperability" route to KLAS Research, Becker's Hospital Review, and Modern Healthcare — the source layer the engines retrieve from. EHR integration claims have become a primary buyer-evaluation criterion for adjacent healthcare-IT vendors.

See: The Healthcare Pillar.