User Support

Do Your own analysis
Explore Expert Research & Limited Datasets

Central Distributor SEDD: Description of Data Elements

PAY1_X - Expected primary payer, as received from data source
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

PAY1_X retains the expected primary payer as provided by the data source. The original values have not been recoded into uniform HCUP values and are source-specific.

Two HCUP data elements contain uniformly coded information about the expected primary payer:

  • PAY1 has general categories for Medicare, Medicaid, private insurance, and other payers.
  • PAY1_N has more detailed categories for private insurance and other payers. PAY1_N is only available in the 1988-1997 HCUP databases. This data element is discontinued beginning in the 1998 data because of the difficulty of coding the information uniformly across States.

Information on the definition of the source values contained in PAY1_X and how the source values are recoded into the HCUP uniform variable PAY1 is available under the note for expected primary payer PAY1.

PAY1_X is included in the NIS beginning in 1998.

Uniform Values
VariableDescriptionValueValue Description
PAY1_XExpected primary payer, as received from data sourcen(a)State specific coding - See the "State Specific Notes" section for details
State Specific Notes

Information on State specific coding for this data element is available under the "State Specific Notes" section for the data element PAY1.


Internet Citation: HCUP Central Distributor SEDD Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). May 2024. Agency for Healthcare Research and Quality, Rockville, MD.
Are you having problems viewing or printing pages on this website?
If you have comments, suggestions, and/or questions, please contact
Privacy Notice, Viewers & Players
Last modified 5/22/24