Sorting search results
FHIR makes it easy to sort the results of your search query according to whatever criteria you require. Add the _sort parameter followed by the name of a search parameter.
Request: Search query for sorting single parameter search results
For example, you can search for patients with a single search parameter, such as sorting by family name (ascending and descending).

Request: Search query for sorting multiple parameter search results
You can also sort by multiple search parameters by combining them with a comma.

Parent topic: FHIR Search operations