Hl7 Message Components 2
n an HL7 message, each segment of the message contains one specific category of health information, such as patient information or patient visit data. The name of each segment in the message is specified by the first field of the segment, which is always three characters long.
HL7 is a messaging standard for data transfer and consistency across disparate systems, which plays a major role in healthcare interoperability. An HL7 message consists of one or more segments, which contains one specific category of information, such as patient information or patient visit data. Further, segments consists of one or more composites, also known as fields.