> For the complete documentation index, see [llms.txt](https://docs.dataplex-consulting.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dataplex-consulting.com/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog/number-of-accountable-care-organization-assigned-beneficiaries-by-county.md). # Number of Accountable Care Organization Assigned Beneficiaries by County Part of the [CMS Data Feeds Dataset](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog.md) › Medicare Dataplex delivers this CMS feed as the analysis-ready table `DWV.NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY` on Snowflake and Databricks — eight snapshot releases spanning 2021–2024, aligned to a single schema, refreshed automatically whenever CMS publishes a new file. Every row carries lineage back to the exact CMS source file that produced it. ## Key facts | | | | ------------------ | ---------------------------------------------------------------------------------- | | **Snowflake** | `DWV.NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY` | | **Databricks** | `cms_dwv.number_of_accountable_care_organization_assigned_beneficiaries_by_county` | | **Coverage** | Jan 2021 – Dec 2024 | | **Cadence** | Annual | | **Update pattern** | Full-refresh — each file replaces the prior snapshot | | **CMS published** | 2025-11-17 | | **Loaded** | 2025-11-17 | | **Columns** | 12 data + 6 lineage | | **Identifiers** | State & county FIPS codes · ACO ID | | **File versions** | 8 | | **License** | CMS public data — U.S. Government work | | **Platforms** | Snowflake Marketplace · Databricks Delta Sharing | Included in the CMS Data Feeds Dataset — [start a free trial on Snowflake Marketplace](https://app.snowflake.com/marketplace/listing/GZT1Z125KDH/dataplex-consulting-data-products-cms-data-feeds-dataset). {% hint style="success" %} **Current** — CMS last published this feed on 2025-11-17. Coverage runs through 2024-12-31. Next CMS release expected \~Nov 2026. {% endhint %} {% hint style="info" %} **Full-refresh feed** — each file version is a complete snapshot and newer files supersede older ones. Filter to the latest file (see the sample query) to avoid double-counting across versions. {% endhint %} ## Sample queries {% tabs %} {% tab title="Snowflake" %} ```sql -- Latest snapshot only (avoids double-counting across file versions) SELECT * FROM DWV.NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY WHERE FILE_ID IN ( SELECT ID FROM DWV.FEEDS_FILES WHERE IS_LATEST = 1 ) LIMIT 100; ``` {% endtab %} {% tab title="Databricks" %} ```sql -- Latest snapshot only (avoids double-counting across file versions) SELECT * FROM cms_dwv.number_of_accountable_care_organization_assigned_beneficiaries_by_county WHERE file_id IN ( SELECT id FROM cms_dwv.feeds_files WHERE is_latest = 1 ) LIMIT 100; ``` {% endtab %} {% endtabs %} ## About this feed > The Shared Savings Program Number of Accountable Care Organization Assigned Beneficiaries by County dataset provides aggregate data of total assigned beneficiaries by Shared Savings Program ACO for each county where at least one of their assigned beneficiaries resides. Assigned beneficiary person-year counts are based on certified Shared Savings Program ACO Participant Lists and assignment methodology for that performance year. > > — *Source: CMS feed metadata* **Keywords:** Medicare, Original Medicare, Value-Based Care, Coordinated Care, Payment Models, Accountable Care Organizations **Theme:** Medicare ## Coverage timeline 2021 🟩 · 2022 🟩 · 2023 🟩 · 2024 🟩 4 of 4 years with snapshot releases — no gaps. ## Release history | Reporting period | CMS published | Loaded | Latest file | | ------------------------- | ------------- | ---------- | ----------- | | Snapshot as of 2025-11-17 | 2025-11-17 | 2025-11-17 | ✓ | | Snapshot as of 2025-11-05 | 2025-11-05 | 2025-11-05 | | | Snapshot as of 2025-09-11 | 2025-09-11 | 2025-10-18 | | | Snapshot as of 2024-11-21 | 2024-11-21 | 2024-11-21 | | | Snapshot as of 2024-01-23 | 2024-01-23 | 2024-01-23 | | | Snapshot as of 2022-09-20 | 2022-09-20 | 2024-01-23 | | | Snapshot as of 2023-09-20 | 2023-09-20 | 2023-09-20 | | | Snapshot as of 2022-09-20 | 2022-09-20 | 2023-08-29 | | ## Data dictionary
📋 12 data columns + 6 lineage columns Column-level definitions are maintained by CMS in the official [Number of Accountable Care Organization Assigned Beneficiaries by County data dictionary](https://data.cms.gov/resources/number-of-accountable-care-organization-assigned-beneficiaries-by-county-data-dictionary-2023). **Data columns** | Column | Type | | ----------------- | ------ | | `YEAR` | NUMBER | | `ACO_ID` | TEXT | | `STATE_NAME` | TEXT | | `COUNTY_NAME` | TEXT | | `STATE_ID` | NUMBER | | `COUNTY_ID` | NUMBER | | `AB_PSN_YRS_ESRD` | NUMBER | | `AB_PSN_YRS_DIS` | NUMBER | | `AB_PSN_YRS_AGDU` | NUMBER | | `AB_PSN_YRS_AGND` | NUMBER | | `TOT_AB_PSN_YRS` | NUMBER | | `TOT_AB` | NUMBER | **Lineage columns** (present on every feed table) | Column | Type | Description | | -------------- | -------------- | -------------------------------------------- | | `ROW_ID` | TEXT | Unique row ID for this table (PK) | | `FILE_ID` | TEXT | Source file — joins to `FEEDS_FILES.ID` (FK) | | `FILE_FEED_ID` | TEXT | Parent feed — joins to `FEEDS.ID` (FK) | | `FILE_NAME` | TEXT | Source file name as published by CMS | | `ROWNUM` | NUMBER | Row number within the source file | | `CREATED_AT` | TIMESTAMP\_NTZ | Timestamp when the record was loaded |
## Row-level lineage Every row in this table traces to the exact CMS source file that produced it. The `FILE_ID` column joins to the `FEEDS_FILES` catalog table, and `FILE_FEED_ID` joins to the `FEEDS` master table: ```mermaid erDiagram FEEDS ||--o{ FEEDS_FILES : "ID = FEED_ID" FEEDS ||--o{ NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY : "ID = FILE_FEED_ID" FEEDS_FILES ||--o{ NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY : "ID = FILE_ID" FEEDS { text ID PK text TITLE text VIEW_NAME text ACCURAL_PERIODICITY } FEEDS_FILES { text ID PK text FEED_ID FK date TEMPORAL_START date TEMPORAL_END date CMS_FEED_MODIFIED number IS_LATEST } NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY { text ROW_ID PK text FILE_ID FK text FILE_FEED_ID FK number YEAR text ACO_ID text STATE_NAME text COUNTY_NAME number remaining_8_data_columns } ``` Trace any row back to its source file and reporting period: ```sql SELECT d.YEAR, d.ACO_ID, d.STATE_NAME, ff.TEMPORAL_START, ff.TEMPORAL_END, ff.CMS_FEED_MODIFIED FROM DWV.NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY d JOIN DWV.FEEDS_FILES ff ON d.FILE_ID = ff.ID; ``` ## Source & provenance Published by the **Centers for Medicare & Medicaid Services** (bureau 009:38). * [Official CMS data dictionary](https://data.cms.gov/resources/number-of-accountable-care-organization-assigned-beneficiaries-by-county-data-dictionary-2023) * [Number of Accountable Care Organization Assigned Beneficiaries by County Methodology](https://data.cms.gov/resources/number-of-accountable-care-organization-assigned-beneficiaries-by-county-methodology) ## Frequently asked questions ### How often is Number of Accountable Care Organization Assigned Beneficiaries by County updated? Annually. CMS last published this feed on 2025-11-17, and Dataplex loaded it to the warehouse the same day. New releases are added automatically when CMS publishes them. ### What years does Number of Accountable Care Organization Assigned Beneficiaries by County cover? 2021 through 2024. ### How many records are in Number of Accountable Care Organization Assigned Beneficiaries by County? Count the current snapshot yourself once the share is mounted: ```sql SELECT COUNT(*) FROM DWV.NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY d JOIN DWV.FEEDS_FILES ff ON d.FILE_ID = ff.ID WHERE ff.IS_LATEST = 1; ``` ### How do I get Number of Accountable Care Organization Assigned Beneficiaries by County data? It's included in the CMS Data Feeds Dataset on the [Snowflake Marketplace](https://app.snowflake.com/marketplace/listing/GZT1Z125KDH/dataplex-consulting-data-products-cms-data-feeds-dataset) (free trial available) and via [Databricks Delta Sharing](https://checkout.dataplex-consulting.com/b/3cIdR2e1J59Sh2w7pWbQY00). Once mounted, query `DWV.NUMBER_OF_ACCOUNTABLE_CARE_ORGANIZATION_ASSIGNED_BENEFICIARIES_BY_COUNTY` directly — no pipeline setup required. ## Related feeds {% content-ref url="/pages/H4QIfWI3AwC5EhEoofEv" %} [Advance Investment Payment Spend Plan](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog/advance-investment-payment-spend-plan.md) {% endcontent-ref %} {% content-ref url="/pages/AkgFCDi7pRR85YFVuxhP" %} [ACO Realizing Equity, Access and Community Health Eligible Beneficiaries](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog/aco-realizing-equity-access-and-community-health-eligible-beneficiaries.md) {% endcontent-ref %} {% content-ref url="/pages/P7at2B9eNJhGExBC0kQ8" %} [REACH ACOs](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog/reach-acos.md) {% endcontent-ref %} {% content-ref url="/pages/aTLUkeVSWj51DyXDK1Tn" %} [County-level Aggregate Expenditure and Risk Score Data on Assignable Beneficiaries](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog/county-level-aggregate-expenditure-and-risk-score-data-on-assignable-beneficiaries.md) {% endcontent-ref %} {% content-ref url="/pages/PUAzbw5efwrJZlbOnnqx" %} [ACO Realizing Equity, Access and Community Health Aligned Beneficiaries](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog/aco-realizing-equity-access-and-community-health-aligned-beneficiaries.md) {% endcontent-ref %} ## Get this feed 1. [Start a free trial on Snowflake Marketplace](https://app.snowflake.com/marketplace/listing/GZT1Z125KDH/dataplex-consulting-data-products-cms-data-feeds-dataset) or purchase via [Databricks](https://checkout.dataplex-consulting.com/b/3cIdR2e1J59Sh2w7pWbQY00) 2. Mount the share — the database and `DWV` schema appear in your account immediately 3. Run the [sample query](#sample-queries) above — no ETL, no pipeline maintenance Questions about this feed? Contact us at . *** Part of the [CMS Data Feeds Dataset](/data-catalog/cms-data-feeds-dataset.md) — 280+ feeds · 245B+ records · updated daily. [Back to the full catalog →](/data-catalog/cms-data-feeds-dataset/cms-data-feeds-catalog.md#number-of-accountable-care-organization-assigned-beneficiaries-by-county) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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