Analysis of clinical specimens to obtain information about the health of a patient.

Data Element

Additional Information

Result Unit of Measure
Unit of measurement to report laboratory test results so that they can be compared. Usage note: required when the test result value is numeric.

Applicable Vocabulary Standard(s)

Applicable Standards
  • The Unified Code of Units for Measure, Revision 2.1


ACLA Comment on Laboratory: Result Unit of Measure

The American Clinical Laboratory Association (ACLA) pertains to the Applicable Standard(s): The Unified Code for Units of Measure (UCUM) \ and the estimate of Overall Burden: Very low burden. This element should already be part of the EHR due to its laboratory regulatory requirement (CLIA). ACLA Comments: These comments pertain to the burden using Unified Code for Units of Measure (UCUM). Using only the UCUM as a standard is problematic and the burden would be very high using this standard. The UCUM cannot be used when it is not supported by the analytic procedure’s documentation for an FDA authorized, cleared, or approved method. Existing interfaces should not be required to update to UCUM. (Note: the FDA approved units must be used for reporting, regardless of the standard used).     

THIA Comment on Laboratory: Result Unit of Measure

The Texas Health Informatics Alliance (THIA) Policy and Standards Working Group supports the proposal for the result unit of measure; however, we recommend adopting the latest Unified Code for Units of Measure (UCUM) version, relative to when the policy gets adopted. The current proposal references UCUM v2.1, which was released in December 2017. The most up-to-date version is UCUM v2.9, which was released in May 2021.

CDC's Consolidated Comment for USCDI v4

  • Physicians, nurses, epidemiologists, and anyone who is using laboratory reports for patient care and public health, including patients, rely on access to the result unit of measure for the correct interpretation of the provided laboratory results. It must be available to the authorized person who ordered the test and, if applicable, the individual responsible for using the test results. It is required by CLIA for all laboratory reports, 493.1291(a)(6) Standard: Test report. Link: ""  
  • Comments from NACCHO: NACCHO supports including the data element unit of measure. However, the unit measure should be standardized and recommends the HL7 standard for the unit of measure to be used. Without a unit of measure, the values/results would be uninterpretable as each lab may report units differently.

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