Key Information

Measure Name	# of SSNs with duplicate MSIS IDs
File Type	ELG
Measure ID	EL-1-004-3
Measure Type	Count
Content area	ELG

Validation

Validation Type	Longitudinal and inferential

Measure Priority

Measure Priority	N/A
Focus Area	N/A
Category	N/A

Claim Information

Claim Type	N/A
Adjustment Type	N/A
Crossover Type	N/A

Thresholds

Minimum	0
Maximum	500
TA Minimun
TA Maximum
Longitudinal Threshold	TBD
For TA (for including in compliance training)	No
For TA (Longitudinal)	No

Data Elements

DD Data Element	SSN • MSIS-IDENTIFICATION-NUM
DD Data Element Number	ELG036 • ELG033

Annotation

Count the number of unique SSNs that have more than one unique MSIS ID.

Specification

STEP 1: Enrolled on the last day of DQ report month Define the eligible population from segment ENROLLMENT-TIME-SPAN-ELG00021 by keeping active records that satisfy the following criteria: 1. ENROLLMENT-EFF-DATE <= last day of the DQ report month 2. ENROLLMENT-END-DATE >= last day of the DQ report month OR missing 3. MSIS-IDENTIFICATION-NUM is not missing STEP 2: Variable demographics on the last day of DQ report month Using the MSIS IDs that meet the criteria from STEP 1, join to segment VARIABLE-DEMOGRAPHICS-ELG00003 by keeping records that satisfy the following criteria: 1a. VARIABLE-DEMOGRAPHIC-ELEMENT-EFF-DATE <= last day of the DQ report month 2a. VARIABLE-DEMOGRAPHIC-ELEMENT-END-DATE >= last day of the DQ report month OR missing OR 1b. VARIABLE-DEMOGRAPHIC-ELEMENT-EFF-DATE is missing 2b. VARIABLE-DEMOGRAPHIC-ELEMENT-END-DATE is missing STEP 3: SSN's with multiple MSIS IDs Use segment VARIABLE-DEMOGRAPHIC-ELG00003 and count unique SSN's associated with more than one MSIS-IDENTIFICATION-NUM