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Central Distributor SASD: Description of Data Elements

NDX - Number of ICD-9-CM diagnoses on this discharge
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

NDX indicates the total number of ICD-9-CM diagnoses (valid and invalid) coded on the discharge record. In assigning NDX, the first listed diagnosis is included in the count, even if it is blank, so long as there is a secondary diagnosis present (see table below).

For data beginning in the fourth quarter of 2015, the count of the number of diagnoses is stored in the data element I10_NDX to indicate the implementation of the ICD-10-CM/PCS coding system.

Value Description
0 No diagnoses are coded on the record
1 Only the first listed diagnosis (DX1) is coded. All secondary diagnoses are blank.
2 One secondary diagnosis (DX2) is coded. The first listed diagnosis (DX1) may be coded or blank.
3 The second and third diagnoses (DX2 and DX3) are coded. The first listed diagnosis (DX1) may be coded or blank.

Uniform Values
VariableDescriptionValueValue Description
NDXNumber of ICD-9-CM diagnoses on this discharge0 - nnNumber of diagnoses
State Specific Notes



Internet Citation: HCUP Central Distributor SASD Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). May 2024. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 5/22/24