HOSPZIP contains the hospital's zip code obtained from the AHA Annual Survey of Hospitals.

During HCUP data processing, the data source's identification of the hospital is reconciled with the identification of the hospital in the AHA Annual Survey of Hospitals. For detailed information about this linking process, see the special report on HCUP Hospital Identifiers.

HOSPZIP is missing if the data source that contributed discharge data to the NIS prohibits the release of hospital identifiers.