This page is part of the At-Home In-Vitro Test Report (v1.1.0: STU 1) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

Getting Started

Getting Started

RADx® MARS - Mobile At Home Reporting through Standards is an initiative aimed at providing guidance and resources for laboratories and healthcare facilities to rapidly implement and scale COVID-19 testing capabilities. One component of the RADx® MARS program is focused on HL7 version 2 (HL7v2) messaging, a widely used standard for healthcare data exchange.

HL7 V2

Resources for HL7v2-based reporting can be found in the “Getting Started: HL7v2” page on the RADx® MARS website.

FHIR

This implementation guide (IG) contains resources for FHIR-based reporting. It constrains the US Core Diagnostic Report for Laboratory Results and the US Core Laboratory Observation Profile for use in transmitting At-Home In-Vitro Test results to downstream health systems, including public health systems.

Patient-specific fields

Patient-related fields fall into two categories: (1) user profile (such as name, address, phone) and (2) test results. User profile fields should require a one-time entry by the individual user of the application. Test result fields need to be populated separately every time a test is taken.

Sender-specific fields

Sender-specific fields help to uniquely identify the sending application and are shown in the table below:

Sender-specific field	FHIR Element
Sending system OID	MessageHeader-at-home-in-vitro-test-results.source.endpoint
Sending facility name	MessageHeader-at-home-in-vitro-test-results.sender(US Core Organization.name)
Sending facility ID	MessageHeader-at-home-in-vitro-test-results.sender(US Core Organization.identifier)
Patient ID Assigner	Patient-at-home-in-vitro-test.identifier.system
Specimen ID Assigner OID	Specimen-at-home-in-vitro-test.identifier.system

The values of these fields will be provided by the Association of Public Health Laboratories (APHL) and will be unique to each application.

To request sender-specific field values for your organization and/or application, follow the link below:

• Sender-specific field values request form

To look up existing sender/receiver-specific field values, follow the link below:

• Sender/receiver-specific field values look up

Test-specific fields

Test-specific fields help to uniquely identify the type of test that is taken. A diagnostics company may manufacture different types of tests. Each type of test will have its own unique ID.

Test-specific fields are available in the CDC-published LOINC In Vitro Diagnostic (LIVD) Test Code Mapping spreadsheet. Any references to “LIVD Spreadsheet” within this FHIR IG are referring to the LIVD Test Code Mapping spreadsheet.

Receiver-specific fields

Receiving System	MessageHeader-at-home-in-vitro-test-results.destination.name	MessageHeader-at-home-in-vitro-test-results.destination.endpoint	MessageHeader-at-home-in-vitro-test-results.destination.receiver(US Core Organization.identifier.value)	MessageHeader-at-home-in-vitro-test-results.destination.receiver(US Core Organization.identifier.system)	MessageHeader-at-home-in-vitro-test-results.destination.receiver(US Core Organization.identifier.type)
APHL AIMS Testing	AIMS.INTEGRATION.STG	urn:oid:2.16.840.1.114222.4.3.15.2	AIMS.PLATFORM	urn:oid:2.16.840.1.114222.4.1.217446	ISO
APHL AIMS Production	AIMS.INTEGRATION.PRD	urn:oid:2.16.840.1.114222.4.3.15.1	AIMS.PLATFORM	urn:oid:2.16.840.1.114222.4.1.217446	ISO
ReportStream	CDC PRIME	urn:oid:2.16.840.1.114222.4.1.237821	AIMS.PLATFORM	urn:oid:2.16.840.1.114222.4.1.237821	ISO