PanelMembers represent the elements of a group of a related but independent evaluations. Examples are the measurements that compose a complete blood count (CBC), or the elements of a pathology report. Each member is an independent evaluation, but the grouping reflects a composite lab order, shared specimen, or a single report author. Typically the Category and Reason are not given for individual findings that are part of the panel, but rather given at the level of the panel itself.

Represents the result of evaluations (measurements, tests, or questions) that have been performed. Observation has a value representing the result (answer), or an ExceptionValue indicating why the value is not present. The subject of a finding can be the entire patient, or an entity such as a location body structure, intervention, or condition. Things observed about the subject can include social and behavioral factors, subjective and objective observations, and assessments.