First secondary inpatient ICD-9-CM or ICD-10-CM procedure code. The decimal point is not coded. The ICD-9-CM or ICD-10-CM procedure must be repeated for all lines of the claim, if necessary.
Definition updated to include institution level information as well as inpatient level information as of 9/1/2022. This field represents only to inpatient admissions for data requests pulled prior to 9/1/2022.