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Central Distributor SID: Description of Data Elements
This section describes how HCUP data elements are coded, restrictions on their use, their uniform values, and State-specific coding practices.
UNITS - Line item units as received from source
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

Line item units (UNITS) are retained as provided by the data source. No edit checks are performed on this data element during HCUP processing.

UNITS are contained in a line item charge detail file. There may be multiple observations in the file with the same revenue code for a discharge record. To identify the total charge and units of service to specific revenue centers, the line item charge (CHARGE) and unit detail (UNITS) for a discharge should be summarized by revenue code (REVCODE) and the HCUP variable KEY which uniquely identifies a discharge. KEY can also be used to merge the detail charge information onto the discharge record in the Core file.

Uniform Values
VariableDescriptionValueValue Description
UNITSLine item units as received from sourcennnnUnits of Service
State Specific Notes


For 2014, UNITS are often coded as zero.

Beginning in 2006, Utah provided a charge detail file. Utah customarily caps their revenue charge detail fields at 23. The revenue charge detail information should only be used as extra transitional fields while retaining the charge buckets (CHG1-Facility Charge, CHG2-Professional Charge, CHG3-Emergency Department Charge, and CHG4-Patient Convenience Item Charge) for completeness.

In 2006, data for hospital #125 includes up to 57 charges on a patient record. Utah is investigating why these additional fields were retained on the file. It is probable that future revenue charge detail information will not include more than the expected 23 charges per patient record.


Internet Citation: HCUP Central Distributor SID Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). August 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 8/12/08