ACO REACH Aligned Beneficiaries

The Accountable Care Organization (ACO) REACH Aligned Beneficiary Public Use File (PUF) data details Medicare Beneficiaries aligned to the ACO REACH Model…

Part of the CMS Data Feeds Dataset › Medicare

Dataplex delivers this CMS feed as the analysis-ready table DWV.ACO_REACH_ALIGNED_BENEFICIARIES on Snowflake and Databricks — three annual reporting periods (2021–2023) 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.ACO_REACH_ALIGNED_BENEFICIARIES
Databricks	cms_dwv.aco_reach_aligned_beneficiaries
Coverage	Jan 2021 – Dec 2023 (3 of 3 annual reporting periods)
Rows	18,353 (total across all reporting periods)
Cadence	Annual
Update pattern	Time-partitioned — each file adds one reporting year
CMS published	2025-05-21
Loaded	2025-05-21
Columns	11 data + 6 lineage
Identifiers	State & county FIPS codes · ACO ID
File versions	3
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.

Current — CMS last published this feed on 2025-05-21. Coverage is complete through the 2023 reporting year.

Time-partitioned feed — each file version covers one reporting year, so history is additive. Query the full table for all years; filter on YEAR for a single period. Do not filter to the latest file only — that would return just the 2023 reporting year.

Sample queries

Snowflake

-- Each file version covers one reporting period (2021, 2022, 2023) — history is additive
SELECT *
FROM DWV.ACO_REACH_ALIGNED_BENEFICIARIES
LIMIT 100;

Databricks

About this feed

The Accountable Care Organization (ACO) REACH Aligned Beneficiary Public Use File (PUF) data details Medicare Beneficiaries aligned to the ACO REACH Model, formerly Global and Professional Direct Contracting (GPDC) Model, including counties, eligibility months and total aligned beneficiaries. This data is redacted and does not include identifiable information.

— 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 🟩

3 of 3 annual reporting periods present — no gaps.

Release history

Reporting period	CMS published	Loaded	Latest file
2023-01-01 – 2023-12-31	2025-05-21	2025-05-21	✓
2022-01-01 – 2022-12-31	2025-05-21	2025-05-21
2021-01-01 – 2021-12-31	2025-04-25	2025-04-25

Data dictionary

📋 11 data columns + 6 lineage columns

Column-level definitions are maintained by CMS in the official ACO REACH Aligned Beneficiaries data dictionary.

Data columns

Column	Type
ACO_ID	TEXT
YEAR	NUMBER
STATE_ID	NUMBER
COUNTY_ID	NUMBER
STATE_NAME	TEXT
COUNTY_NAME	TEXT
ELIG_MONTHS_AD	NUMBER
ELIG_MONTHS_ESRD	NUMBER
ELIG_MONTHS_TOTAL	NUMBER
ALIGNED_BENEFICIARIES_AD	NUMBER
ALIGNED_BENEFICIARIES_ESRD	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:

Trace any row back to its source file and reporting period:

SELECT d.ACO_ID, d.YEAR, d.STATE_ID,
       ff.TEMPORAL_START, ff.TEMPORAL_END, ff.CMS_FEED_MODIFIED
FROM DWV.ACO_REACH_ALIGNED_BENEFICIARIES 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

• ACO REACH Model Methodology

Frequently asked questions

How often is ACO REACH Aligned Beneficiaries updated?

Annually. CMS last published this feed on 2025-05-21, and Dataplex loaded it to the warehouse the same day. New releases are added automatically when CMS publishes them.

What years does ACO REACH Aligned Beneficiaries cover?

2021 through 2023 — three annual reporting periods with no gaps. Each reporting year arrives as its own file version, and all years remain queryable side by side.

How many records are in ACO REACH Aligned Beneficiaries?

18,353 rows across all three reporting periods. Because this feed is time-partitioned, the full table total is the meaningful count — no deduplication needed.

How do I get ACO REACH Aligned Beneficiaries data?

It's included in the CMS Data Feeds Dataset on the Snowflake Marketplace (free trial available) and via Databricks Delta Sharing. Once mounted, query DWV.ACO_REACH_ALIGNED_BENEFICIARIES directly — no pipeline setup required.

Related feeds

Prepaid Shared Savings Spend PlanPerformance Year Financial and Quality ResultsCounty-level Aggregate Expenditure and Risk Score Data on Assignable BeneficiariesACO Realizing Equity, Access and Community Health Aligned BeneficiariesACO Realizing Equity, Access and Community Health Providers

Get this feed

1. Start a free trial on Snowflake Marketplace or purchase via Databricks

2. Mount the share — the database and DWV schema appear in your account immediately

3. Run the sample query above — no ETL, no pipeline maintenance

Questions about this feed? Contact us at [e-mail].

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