List Order Codes

This code system http://hl7.org/fhir/list-order defines the following codes:

Code	Display	Definition
user	Sorted by User	The list was sorted by a user. The criteria the user used are not specified.
system	Sorted by System	The list was sorted by the system. The criteria the user used are not specified; define additional codes to specify a particular order (or use other defined codes).
event-date	Sorted by Event Date	The list is sorted by the data of the event. This can be used when the list has items which are dates with past or future events.
entry-date	Sorted by Item Date	The list is sorted by the date the item was added to the list. Note that the date added to the list is not explicit in the list itself.
priority	Sorted by Priority	The list is sorted by priority. The exact method in which priority has been determined is not specified.
alphabetic	Sorted Alphabetically	The list is sorted alphabetically by an unspecified property of the items in the list.
category	Sorted by Category	The list is sorted categorically by an unspecified property of the items in the list.
patient	Sorted by Patient	The list is sorted by patient, with items for each patient grouped together.