The practitioner who is responsible for admitting a patient to a patient encounter.

The practitioner that has responsibility for overseeing a patient's care during a patient encounter.

A person or organization who should be contacted for follow-up questions about the act in place of the author.

An advisor participating in the service by performing evaluations and making recommendations.

The practitioner who is responsible for the discharge of a patient from a patient encounter.

Only with Transportation services. A person who escorts the patient.

A person having referred the subject of the service to the performer (referring physician). Typically, a referring physician will receive a report.

A person assisting in an act through his substantial presence and involvement This includes: assistants, technicians, associates, or whatever the job titles may be.

The principal or primary performer of the act.

Indicates that the target of the participation is involved in some manner in the act, but does not qualify how.

A translator who is facilitating communication with the patient during the encounter.

A person to be contacted in case of an emergency during the encounter.

The facility where the service is done. May be a static building (or room therein) or a moving location (e.g., ambulance, helicopter, aircraft, train, truck, ship, etc.)

The principle target on which the action happens.

Examples: The patient in physical examination, a specimen in a lab observation. May also be a patient's family member (teaching) or a device or room (cleaning, disinfecting, housekeeping).

UsageNotes: Not all direct targets are subjects. Consumables and devices used as tools for an act are not subjects. However, a device may be a subject of a maintenance action.