An InstantMessage resource is used to describe a message between persons and organizations in HealthGorilla Application. A message is a composite object that contains a sender and recipients, a subject, a message body and attachments. Users may send messages to (and receive from) physicians, practice staff, patients, healthcare organizations.

An InstantMessage is designed to describe HealthGorilla Secure Messages and should not be used for other purposes.
An InstantMessage can contain DiagnosticReport, RequestGroup, DocumentReference, ServiceRequest as attachments.