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Highlights: The first Medicaid/CHIP Environmental Scanning and Program Characteristics (ESPC) database in Access format and accompanying User guide is now available. Follow link in the "Related Links Inside CMS" below. WHAT'S NEW - MAX 2008 data are now available for all states. Please see the MAX availability document in the Downloads section for MAX Data 2005 and later for more details.
- An updated version of the MAX DOD report is now available. See the link on left margin.
- A few new Frequently Asked Questions (FAQs) related to MAX and the Medicaid data have been added. Follow 1st link in the "Related Links Inside CMS" section below.
- A new Medicaid Issue Brief has been released titled, "Prescription Drug Use and Cost Among Medicaid Beneficiaries with Disabilities and Chronic Illness." This Issue Brief is available on the Mathematica Policy Research, Inc. website. A link to that web page is located below in the "Related Links Outside CMS" section.
- A new report has been released titled, "Collecting, Using, and Reporting Medicaid Encounter Data: A Primer for States." Please see the link 'Technical Assistance to States for Managed Care Encounter Data' in the left margin.
- MAX 1999-2007 has now been linked to selected records from surveys administered by the National Center for Health Statistics (NCHS). Surveys included in the new linked data files include the 1994-2005 National Health Insurance Survey (NHIS), the 1999-2004 National Health and Nutrition Examination Survey (NHANES), and the 2004 National Nursing Home Study (NNHS). For additional information, including instructions for requesting access to the linked files, see the NCHS website in the "Related Links Outside CMS" section below.
- Beta-MAX files (early-release versions of MAX data) are now available for 2009 and 2010. Please see the link to Beta MAX in the box on the left side of this page for more information.
Description The Medicaid Analytic eXtract (MAX) data is a set of person-level data files on Medicaid eligibility, service utilization, and payments. The MAX data are created to support research and policy analysis. The MAX data are extracted from the Medicaid Statistical Information System (MSIS). The MAX development process combines MSIS initial claims, interim claims, voids, and adjustments for a given service into final action events. Unlike fiscal-based MSIS quarterly files, MAX data are organized into annual calendar year files. There are a number of other "value added" enhancements to the MAX data for users as described below. Availability MAX data are derived from MSIS, and because it is necessary to allow for the delay between service delivery dates and claims adjudication dates, the availability of MAX data for a particular time period lags behind that of the MSIS data. Since the MAX data contain individually identifiable data, they are protected under the Privacy Act. They are available for approved research activities only through a Data Use Agreement (DUA) with the Centers for Medicare & Medicaid Services (CMS). Note that only approved academic research projects and certain government agencies are entitled to a DUA to obtain MAX data. For information on applying for a DUA, see the "Related Links Inside CMS" at the bottom of this page. Introduction An "Introduction to Medicaid Analytic eXtract (MAX) Data" is available via the download listed at the bottom of this page. The presentation should answer a number of basic questions about MAX, in that it: - Presents the source and an overview of MAX data;
- Describes five types of MAX data sets;
- Explains the need for MAX data;
- Reviews a number of MAX data enhancements for Eligibility, Service use and payment;
- Provides linkages to other data sources;
- Describes related MAX data products; and
- Identifies Medicaid data limitations.
Medicaid Analytic eXtract (MAX) Data Element Dictionary Changes 2005 to 2008 The MAX data dictionaries have been changed after 2004 to include new data elements that are being collected through MSIS and new data elements that have been added to MAX: New Eligibility Data Elements - Improved verification of Social Security Numbers (SSNs)
- Expanded detail on enrollee race and ethnicity
- Monthly dual Medicare and Medicaid enrollment (earlier years were reported quarterly)
- Waiver plan identifier and waiver type enrollment in up to three waivers per month
- Enrollment in 1915(c) waivers on an annual basis
New Service Data Elements - Expenditures for 21 categories of community-based long-term care
- National Provider Identifier (available in 2009)
- Provider Taxonomy (available in 2009)
Medicaid Analytic eXtract (MAX) Data 1999 to 2008 The separate downloads listed at the bottom and in the box on the left side of this page provide technical information regarding more current MAX data (2005 to 2008) and earlier MAX data (1999 to 2004). Please note that the data dictionaries and data element lists have included new data elements for 2005-2008, compared to 1999-2004. These downloads include: General information
(1) MAX Data Availability by year and State.
(2) Record Counts by State and file type.
(3) SAS Load Statements - For users of the Statistical Analysis System - SAS, we have prepared a sample of the SAS load statements that can be used for each of the MAX types of files. While these load statements do not include all data elements for each file, they include most of the frequently used MAX data elements and examples of the various data formats present in the MAX data, including zoned decimal formats.
(4) Data dictionaries – These downloads include the data dictionaries for the Inpatient Hospital (IP), Long-Term Care (LT), Other Services (OT), Prescription Drug (RX), and Person Summary (PS) MAX files. The record lengths and variable locations have not changed from 2005 through 2008, but there are definitional and coding changes that have occurred in each of these years. For this reason, new data dictionaries are being prepared for each year, starting with 2005. The format of these dictionaries is in three parts: a. Changes from the previous year, b. Data element lists, and c.The full data dictionary.
(5) Data element lists – These separate documents for years before 2005 include the data element lists for the Inpatient Hospital (IP), Long-Term Care (LT), Other Services (OT), Prescription Drug (RX), and Person Summary (PS) MAX files. As noted above, the data element lists for years after 2005 are included in the data dictionaries.
(6) Data Anomalies Reports and Tables –These documents include reports and/or tables on the MAX Eligibility and Claims Anomalies.
(7) Definitions of Analytic Measures - for all Validation Reports
(8) MAX Validation Reports - These reports are prepared for each of the 50 states and the District of Columbia. The reports provide a wealth of high level statistical summary data information on the data contained in the MAX files, including enrollment, utilization and Medicaid payments. These reports are accessible by clicking on "MAX Validation reports" in the margin on the left of this page. After you have clicked on this link, you will have a list of state reports from which you can select. Medicaid Analytic eXtract (MAX) Archive Data 1998 and Earlier The Download listed at the bottom of this page for 1998 and earlier provides technical information regarding archive State Medicaid Research Files (SMRF) data for 1996-1998. - General information: This download includes information regarding what SMRF data are available and the record counts by state for 1996-1998.
- Data dictionaries: These downloads include the SMRF data dictionaries for the Inpatient Hospital (IP), Long-Term Care (LT), Other Services (OT), Prescription Drug (RX), and Person Summary (PS) files for 1996-1998.
- Data element lists: These documents include the SMRF data element lists for the Inpatient Hospital (IP), Long-Term Care (LT), Other Services (OT), Prescription Drug (RX), and Person Summary (PS) files for 1996-1998.
- Validation Reports: These documents contain the SMRF data validation reports for the 31 states available for 1996-1998.
- Data Anomalies Report: These documents contain the data anomalies report on the SMRF data for 1996-1998.
The download listed at the bottom of this page for 1998 and earlier provides technical information regarding archive SMRF data for the years 1998 and earlier. - General information: This download includes information regarding what SMRF data are available for 1995 and earlier.
- Data dictionaries: These downloads include the SMRF data dictionaries for the Inpatient Hospital (IP), Long-Term Care (LT), Other Services (OT), Prescription Drug (RX), and Person Summary (PS) files from 1995 and earlier.
- Data element lists: These documents include the SMRF data element lists for the Inpatient Hospital (IP), Long-Term Care (LT), Other Services (OT), Prescription Drug (RX), and Person Summary (PS) files from 1995 and earlier.
| Downloads | Introduction to Medicaid Analytic eXtract (MAX) Data [PDF & Powerpoint Zipped, 945 KB]
MAX Data 2005 and later
General Information, Data Dictionaries, Data Element Lists, Data Anomalies, Validation Table Measures and SAS Loads [PDF Zipped, 23.4 MB]
MAX Data 1999 to 2004
General Information, Data Dictionaries, Data Element Lists, Data Anomalies, Validation Table Measures and SAS Loads [PDF & Excel Zipped, 6,325 KB]
Archive Data 1998 and Earlier
These files are currently available only to CMS Data Center Users, such as CMS employees or contractors.
[PDF Zipped, 29,487 KB]
| | Related Links Inside CMS | Medicaid/CHIP Environmental Scanning and Program Characteristics (ESPC)
Frequently Asked Questions
Privacy Protected Data Requests
Data Use Agreement (DUA) Form [PDF, 264 KB]
Validation Tables List
Statistical Compendium: Medicaid Pharmacy Benefit Use and Reimbursement
Medicaid At-a-Glance - The CMS, Center for Medicaid and State Operations produces this brochure. | | Related Links Outside CMS |  | Medicaid Prescription Drug Issue Brief - This is an Issue Brief, titled "Prescription Drug Use and Cost Among Medicaid Beneficiaries with Disabilities and Chronic Illnesses" based on an analysis of MAX data.
MAX and NCHS Linked Data
Research Data Assistance Center (ResDAC)
Statehealthfacts.org - a free resource from the Kaiser Family Foundation, allows users to easily view information for a single state or compare and rank data across all 50 states and compare it to U.S. totals.
State Medicaid Fact Sheets - an interactive online tool from the Kaiser Commission on Medicaid and the Uninsured.
Medicaid Benefits Online Database - an interactive online tool from the Kaiser Commission on Medicaid and the Uninsured provides easy access to information on services provided by each state's Medicaid program.
National Pharmaceutical Council (NPC) - The Pharmaceutical Benefits under States Medical Assistance Programs is an annual research publication published by the NPC.
MCH Policy Research Center - is a health policy group that provides federal and state policymakers, public health officials, and provider and family organizations with analysis of financing and service delivery issues affecting children and adolescents. |
Page Last Modified: 01/20/2012 4:28:02 PM
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