---
title: "CS: Source Patient"
canonical: "https://wiki.patientsknowbest.com/space/api/3649896449/CS%3A%20Source%20Patient"
format: markdown
---
[http://fhir.patientsknowbest.com/codesystem/source-patient](http://fhir.patientsknowbest.com/codesystem/source-patient)

[https://www.hl7.org/fhir/STU3/codesystem.html](https://www.hl7.org/fhir/STU3/codesystem.html)

## description

This code system represents resource IDs of the source patient.

For reasons of implementation efficiency, the resource ID is sometimes returned as a Coding in the **meta.security** element of a resource.

The extension which represents the same information when not in a Coding is: [http://fhir.patientsknowbest.com/structuredefinition/source-person](http://fhir.patientsknowbest.com/structuredefinition/source-person) (but note that this is a more general extension which can capture a source person that is not necessarily a patient).