data.cms.gov

Minimum Data Set Frequency

The Minimum Data Set (MDS) Frequency data summarizes health status indicators for active residents currently in nursing homes.

Freshness

Last posted
Period covered
Jul 1, 2026 to Sep 30, 2026
Update frequency
Quarterly

Dates as CMS lists them in its catalog.

Columns 6

ColumnWhat it meansType
Geographical LocationGeographical Locationstring
Report DateReport Datestring
MDS Item Question/DescriptionMDS Item Question/Descriptionstring
MDS Item ResponseMDS Item Responsestring
PercentPercentContains the percent of responses for each item, geographical location and reporting quarter.number
Total ResidentsTotal Residentsnumber

At a glance

Catalog
data.cms.gov
Publisher
Office of Enterprise Data and Analytics (OEDA)
Rows
133,920
Columns
6
State column
None found
Topics
Medicaid and CHIP, Quality and ratings
Contact
iqies@cms.hhs.gov

API

Free, no key needed. This request returns the first 10 rows as JSON:

https://data.cms.gov/data-api/v1/dataset/4b50bbe6-a496-4eda-b03b-5f835937f81b/data?size=10

Versions 27

The newest version is the one linked above. Older releases stay on the official site.

  • 2026-07-01posted Oct 6, 2026
  • 2026-04-01posted Jul 6, 2026
  • 2026-01-01posted Apr 6, 2026
  • 2025-10-01posted Jan 27, 2026
  • 2025-07-01posted Nov 19, 2025
  • 2025-04-01posted Jul 15, 2025
  • 2025-01-01posted Apr 8, 2025
  • 2024-12-02posted Apr 8, 2025
Show 19 older versions
  • 2024-07-02posted Mar 31, 2025
  • 2024-04-02posted Mar 31, 2025
  • 2024-01-02posted Mar 31, 2025
  • 2023-12-02posted Mar 31, 2025
  • 2023-07-02posted Mar 31, 2025
  • 2023-04-02posted Mar 31, 2025
  • 2023-01-02posted Mar 31, 2025
  • 2022-12-02posted Mar 31, 2025
  • 2022-07-02posted Mar 31, 2025
  • 2022-04-02posted Mar 31, 2025
  • 2022-01-02posted Mar 31, 2025
  • 2021-12-02posted Mar 31, 2025
  • 2021-07-02posted Mar 31, 2025
  • 2021-04-02posted Mar 31, 2025
  • 2021-01-02posted Mar 31, 2025
  • 2020-12-02posted Mar 31, 2025
  • 2020-07-02posted Mar 31, 2025
  • 2020-04-02posted Mar 31, 2025
  • 2020-01-02posted Mar 31, 2025

CMS's description

The Minimum Data Set (MDS) Frequency data summarizes health status indicators for active residents currently in nursing homes. The MDS is part of the Federally-mandated process for clinical assessment of all residents in Medicare and Medicaid certified nursing homes. This process provides a comprehensive assessment of each resident's functional capabilities and helps nursing home staff identify health problems. Care Area Assessments (CAAs) are part of this process, and provide the foundation upon which a resident's individual care plan is formulated. MDS assessments are completed for all residents in certified nursing homes, regardless of source of payment for the individual resident. MDS assessments are required for residents on admission to the nursing facility, periodically, and on discharge. All assessments are completed within specific guidelines and time frames. In most cases, participants in the assessment process are licensed health care professionals employed by the nursing home. MDS information is transmitted electronically by nursing homes to the national MDS database at CMS. When reviewing the MDS 3.0 Frequency files, some common software programs e.g., ‘Microsoft Excel’ might inaccurately strip leading zeros from designated code values (i.e., "01" becomes "1") or misinterpret code ranges as dates (i.e., O0600 ranges such as 02-04 are misread as 04-Feb). As each piece of software is unique, if you encounter an issue when reading the CSV file of Frequency data, please open the file in a plain text editor such as ‘Notepad’ or ‘TextPad’ to review the underlying data, before reaching out to CMS for assistance.

Methodology and other documents from CMS:

The summary at the top is the first sentence of this description. Record id cms:4b50bbe6-a496-4eda-b03b-5f835937f81b. This record as JSON.

Keyboard shortcuts

/
Jump to the search box (or the column filter on a dataset page)
Esc
Clear the search box, or close this panel
↓ ↑
Move through the results from the search box
Enter
Open the highlighted result
?
Show this panel