Common CQL Artifacts for FHIR (US-Based), published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/us-cql-ig/ and changes regularly. See the Directory of published versions

Service Patterns

Page standards status: Informative

US Core defines US Core ServiceRequest to track the proposal / planning / ordering of a service, and US Core Procedure to track performing a service.

Typical procedure codes include SNOMED-CT, CPT, HCPCS II, ICD-10-PCS, CDT, and LOINC.

Modifier Elements

The ServiceRequest resource defines the following modifier elements:

• status
• intent
• doNotPerform

In addition to being modifiers, the status and intent elements are required with a required binding. The USCoreCommon library defines several functions for determining status and intent.

However, doNotPerform is not required, so care must be taken to ensure that if specified, the doNotPerform element is respected.

Search Parameters

USCore defines the following mandatory search parameters:

• patient, category
• patient, code
• patient, category, authored

In addition, the following optional parameters are defined:

• patient, status
• patient, code, authored

NOTE: For discussion on how to manage search parameters with terminology, see the Terminology Considerations discussion in the Architectural Guidance topic.

NOTE: For discussion on how to manage optional search parameters, see the Performant Data Access discussion in the Architectural Guidance topic.

Cross-Version Considerations

Note that 3.1.1 does not define a profile for ServiceRequest, so the direct FHIR ServiceRequest resource is used.

Common Elements and Functions

Requested Services

NOTE: In the prior auth use case, the workflow is generally being conducted in the context of 1 or more order, so you'll want to start by working off that context before searching the FHIR server for service requests.

If you need to search for requested services, this is made available with UCE."All ServiceRequests".

NOTE: Content for this page was adapted from the QICore Authoring Patterns - Procedures topic.