Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Dual Status Information for Medicaid and CHIP Beneficiaries by Year

Metadata Updated: June 27, 2024

This data set presents annual enrollment counts of Medicaid and CHIP beneficiaries by dual eligibility status for Medicaid and Medicare (full dual eligibility, partial dual eligibility, or not dually eligible). There are three metrics presented: (1) the number of beneficiaries ever dually eligible for Medicaid and Medicare over the year (duplicated count); (2) the number of beneficiaries dually eligible for Medicaid and Medicare as of an individual’s last month of enrollment (unduplicated count); and (3) average monthly eligibility for Medicaid and Medicare.

These metrics are based on data in the T-MSIS Analytic Files (TAF). Some states have serious data quality issues for one or more months, making the data unusable for calculating these measures. To assess data quality, analysts adapted measures featured in the DQ Atlas. Data for a state and month are considered unusable or of high concern based on DQ Atlas thresholds for the topic Dually Enrolled in Medicare. Please refer to the DQ Atlas at for more information about data quality assessment methods.

Some cells have a value of “DS”. This indicates that data were suppressed for confidentiality reasons because the group included fewer than 11 beneficiaries.

Access & Use Information

Public: This dataset is intended for public access and use. License: us-pd

Downloads & Resources


Metadata Created Date March 29, 2023
Metadata Updated Date June 27, 2024
Data Update Frequency R/P10Y

Metadata Source

Harvested from

Additional Metadata

Resource Type Dataset
Metadata Created Date March 29, 2023
Metadata Updated Date June 27, 2024
Publisher Centers for Medicare & Medicaid Services
Identifier 93b36a8e-4dd5-4ff4-9a8b-8c6537684705
Data First Published 2023-03-28
Data Last Modified 2024-01-05
Category Enrollment
Public Access Level public
Data Update Frequency R/P10Y
Bureau Code 009:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id f2188e51-adcf-447a-a4d8-380a01d99c49
Harvest Source Id 651e43b2-321c-4e4c-b86a-835cfc342cb0
Harvest Source Title
Homepage URL
Program Code 009:000
Source Datajson Identifier True
Source Hash b0b4398c665193751f36b029b01bf3c0aec59c698bebbb3190f58eea48710f57
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.