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NEDS Description of Data Elements

PR_IPn - ICD-9-CM procedure code
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

ICD-9-CM procedures from the State Inpatient Databases (SID) are retained in the data elements PR_IP1 to PR_IP9.

While nine ICD-9-CM procedures per ED inpatient event are retained in the NEDS, the number of code fields populated varies. While some States report more than the nine ICD-9-CM procedures, less than 2% of all ED inpatient records report more than nine procedure fields. The data element NPR_IP lists the number of ICD-9-CM procedures reported on the original SID record.

The original value of the ICD-9-CM first listed procedure (PR_IP1), whether blank or coded, is retained in the first position of the procedure vector. Starting at the first secondary procedure (PR_IP2), the procedures are shifted during HCUP processing to eliminate blank secondary procedures. For example, if PR_IP2 and PR_IP4 contain non-missing procedures and PR_IP3 is blank, then the value of PR_IP4 is shifted into PR_IP3. Secondary procedures are never shifted into the first listed position (PR_IP1).

Validity and consistency checks for the procedure are consistent with all other HCUP databases.

Uniform Values
VariableDescriptionValueValue Description
PR_IPnICD-9-CM procedure codennnnProcedure code
invlInvalid procedure
incnInconsistent procedure
State Specific Notes

Internet Citation: HCUP NEDS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). May 2015. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 5/8/15