Data Element


It might be beneficail to indicate that element can repeat

APHL recommends updating the description to: The anatomical site the specimen was taken from (e.g., leg, lung, nasopharynx, etc.)

Note that this element can repeat - and as for most coded elements, if a code is not available, sending of free text should be required.

Update vocabulary to more specific value sets: Body Site Value Set ( and SNOMED CT Body Structures (

Source Site vocabulary suggestion

APHL fully supports inclusion of this data element and suggests to further specify the hierarchy in SNOMED CT for this data element - concepts should be from the body structure hierarchy.

CAP Comment on Specimen Source Site

  • Data Class: Laboratory
  • Data Element: Specimen Source Site
  • CAP Comment: The CAP applauds the ONC’s decision to add this data element to USCDI v4, as this data element indicates the body location where a specimen was obtained and is required by CLIA.

THIA Comment on Laboratory: Specimen Source Site

The Texas Health Informatics Alliance (THIA) Policy and Standards Working Group supports the proposal for specimen source site. We support the actions to help mine data for specimens.

CDC's Consolidated Comment for USCDI v4

  • CDC-CMS Joint Priority Data element

Disease reporting to public health relies on data from the EHR for identification of reportable events and to provide critical information used in confirming a diagnosis, understanding severity and classifying a case of disease that requires public health intervention for prevention, treatment, control, and outbreak identification and response. The specimen collection date is of particular importance for public health in understanding when laboratory confirmable evidence of a disease process was present in the patient. Specimen type and specimen site provides information useful in interpreting laboratory findings to determine severity and transmissibility. Required by CLIA for all laboratory reports, 493.1291 Standard: Test report. Link

  • Comments from NACCHO: NACCHO supports including the data element specimen source site but recommends using the HL7 reference standard for the specimen source site.
  • Comments from CSTE: CSTE agrees with CDC's recommendation for this data element.

CAP Comment on Specimen Source Site

Data Element: Specimen Source Site

  • Corresponding CLIA Reporting Requirement: Specimen source
  • Description: The College of American Pathologists (CAP) supports the inclusion of this Level 2 data element into USCDI v4 to align with CLIA’s Specimen Source reporting requirement. The CLIA requirements are required for laboratory reporting and should be used as the basis for laboratory and public health reporting standards. 
  • Vocabulary Standard: For the content of the data element, the CAP recommends replacing the LOINC standard with the SNOMED CT standard. LOINC does not adequately represent specimen types or anatomic locations and relationships necessary to represent specimens and their sources, and is not intended for that purpose. SNOMED CT is a relatively complete, well-curated, and actively-managed medical ontology that has excellent coverage of concepts appropriate for description of laboratory specimens and specimen sources, and supports a rich array of hierarchical and other concept relationships.

APHL Comments on ISA 2022

APHL continues to support inclusion of this data element in the Laboratory class of USCDI V4; it is mentioned in CLIA as a “provide as appropriate” element.

Unified Comment from CDC

  • Additional Use Case: This is a standard data item used by central cancer registries in all states. Data received through data exchange from laboratories to central cancer registries for CDC and NCI’s national cancer surveillance systems, as required by law.  
  •  CSTE supports inclusion of this measure into USCDI v3: very useful for laboratory related fields context.

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