|General SASD Notes|
Types of Ambulatory Surgery and Other Outpatient Services Collected by the Partner
Wisconsin defines an ambulatory surgery record by the outpatient place of service and by one of the following types of revenue codes:
Wisconsin defines an observation services record by the outpatient place of service and by revenue code 0760 or 0762.
Wisconsin assigns the type of outpatient encounter based on the last place of service. Therefore, if the patient had an ambulatory surgery followed by observation services, the outpatient record is only classified as observation.
Outpatient Data File Provided to HCUP by the Partner
Beginning in data year 2014, Wisconsin provides HCUP with separate outpatient and inpatient files.
For data years 2006-2013, Wisconsin provided their outpatient and inpatient records in a combined data file. Outpatient records are clearly identified by record type.
Prior to 2006, Wisconsin provided separate ambulatory surgery data files to HCUP by selecting records with at least one International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) procedure in the range 01.01-86.99 or Current Procedural Terminology (CPTŪ) procedure in the range 10000-69999.
Wisconsin masks abortion-related ICD-9-CM and CPT diagnosis and procedure codes to remove the distinction between spontaneous and induced abortions.
Selection of Records for Inclusion in the SASD
Beginning in 2007, all records marked by Wisconsin as ambulatory surgery are included in the SASD (STATE_AS=1 based on record type 1). Any other nonemergent outpatient records (STATE_ED not equal to 1) also are included in the SASD.
Prior to 2007, all records included in the distinct ambulatory surgery file were included in the SASD.
Additionally, any record in the SASD that also have evidence of ED services based on the HCUP criteria (HCUP data element HCUP_ED > 0), are also included in the HCUP State Emergency Department Databases (SEDD). These records will have the same value for the HCUP data element KEY.
Types of Facilities Included in the Files Provided to HCUP by the Partner
Identification of Hospital-Owned Ambulatory Surgery and Other Types of Outpatient Facilities in the SASD
If the facility in the SASD does not meet any of the above criteria, it is marked as not being owned by a hospital (HOSPITAL_OWNED = 0). Not all hospitals report to the AHA, so there is a possibility that some facilities marked with HOSPITAL_OWNED=0 are hospital-owned.
From data year 1998-2018, the HCUP data element was called FREESTANDING. A facility is considered hospital-owned (FREESTANDING = 0) if any one of the following is true:
If the facility in the SASD does not meet any of the above criteria, it is marked as not being owned by a hospital (FREESTANDING = 1). Not all hospitals report to the AHA, so there is a possibility that some facilities marked with FREESTANDING=1 are hospital-owned.
Exclusion of Records During HCUP Processing
Beginning with 2017 data, records with a discharge disposition of "still a patient" are retained in the HCUP SASD. Prior to 2017 data, these records were excluded.
Beginning in 2010, records with a designation of "admitted as an inpatient" are retained in the SASD, even though this rarely occurs. Prior to 2010, records with a designation of "admitted as an inpatient" were excluded from the files.
|Internet Citation: HCUP Central Distributor SASD Wisconsin File Composition. Healthcare Cost and Utilization Project (HCUP). August 2006. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/state/sasddist/sasddist_filecompwi.jsp.|
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|Last modified 8/15/06|