Accountable Care Organization Participants

The Accountable Care Organization (ACO) Participants data presents overview information on ACO participants in the Medicare Shared Savings Program (Shared…

Part of the CMS Data Feeds Dataset › Medicare

Dataplex delivers this CMS feed as the analysis-ready table DWV.ACCOUNTABLE_CARE_ORGANIZATION_PARTICIPANTS on Snowflake and Databricks — eight annual reporting periods (2022–2026) 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.ACCOUNTABLE_CARE_ORGANIZATION_PARTICIPANTS
Databricks	cms_dwv.accountable_care_organization_participants
Coverage	Jan 2022 – Dec 2026 (5 of 5 annual reporting periods)
Rows	124,488 (total across all reporting periods)
Cadence	Annual
Update pattern	Time-partitioned — each file adds one reporting year
CMS published	2026-02-04
Loaded	2026-02-04
Columns	32 data + 6 lineage
Identifiers	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.

Current — CMS last published this feed on 2026-02-04. Coverage is complete through the 2026 reporting year. Next CMS release expected ~Feb 2027.

Time-partitioned feed — each file version covers one reporting year, so history is additive. Query the full table for all years; filter on the reporting period columns for a single period. Do not filter to the latest file only — that would return just the 2026 reporting year.

Sample queries

Snowflake

-- Each file version covers one reporting period (2022, 2023, 2024, 2025, 2026) — history is additive
SELECT *
FROM DWV.ACCOUNTABLE_CARE_ORGANIZATION_PARTICIPANTS
LIMIT 100;

Databricks

About this feed

The Accountable Care Organization (ACO) Participants data presents overview information on ACO participants in the Medicare Shared Savings Program (Shared Savings Program), including their name, track status, number of years in the program, and contact information of key personnel.

— Source: CMS feed metadata

Keywords: Medicare, Value-Based Care, Coordinated Care, Payment Models, Accountable Care Organizations Theme: Medicare

Coverage timeline

2022 🟩 · 2023 🟩 · 2024 🟩 · 2025 🟩 · 2026 🟩

5 of 5 annual reporting periods present — no gaps.

Release history

Reporting period	CMS published	Loaded	Latest file
2026-01-01 – 2026-12-31	2026-02-04	2026-02-04	✓
2025-01-01 – 2025-12-31	2025-09-10	2025-10-18
2025-01-01 – 2025-12-31	2025-01-15	2025-01-15
2024-01-01 – 2024-12-31	2024-01-29	2024-01-29
2023-01-01 – 2023-12-31	2023-03-06	2024-01-29
2022-01-01 – 2022-12-31	2022-01-26	2024-01-29
2023-01-01 – 2023-01-31	2023-03-06	2023-08-29
2022-01-01 – 2022-01-31	2022-01-26	2023-08-29

Data dictionary

📋 32 data columns + 6 lineage columns

Column-level definitions are maintained by CMS in the official Accountable Care Organization Participants data dictionary.

Data columns

Column	Type
__ACO_ID	TEXT
PAR_LBN	TEXT
ACO_NAME	TEXT
ACO_SERVICE_AREA	TEXT
AGREEMENT_PERIOD_NUM	NUMBER
INITIAL_START_DATE	DATE
CURRENT_START_DATE	DATE
RE_ENTERING_ACO	NUMBER
BASIC_TRACK	NUMBER
BASIC_TRACK_LEVEL	TEXT
ENHANCED_TRACK	NUMBER
HIGH_REVENUE_ACO	NUMBER
LOW_REVENUE_ACO	NUMBER
ADV_PAY	NUMBER
AIM	NUMBER
AIP	NUMBER
PSS	NUMBER
SNF_3_DAY_RULE_WAIVER	NUMBER
PROSPECTIVE_ASSIGNMENT	NUMBER
RETROSPECTIVE_ASSIGNMENT	NUMBER
ACO_ADDRESS	TEXT
ACO_PUBLIC_REPORTING_WEBSITE	TEXT
ACO_EXEC_NAME	TEXT
ACO_EXEC_EMAIL	TEXT
ACO_EXEC_PHONE	TEXT
ACO_PUBLIC_NAME	TEXT
ACO_PUBLIC_EMAIL	TEXT
ACO_PUBLIC_PHONE	TEXT
ACO_COMPLIANCE_CONTACT_NAME	TEXT
ACO_MEDICAL_DIRECTOR_NAME	TEXT
PC_FLEX_AGREEMENT_STATUS	NUMBER
ACO_ID	TEXT

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.PAR_LBN, d.ACO_NAME,
       ff.TEMPORAL_START, ff.TEMPORAL_END, ff.CMS_FEED_MODIFIED
FROM DWV.ACCOUNTABLE_CARE_ORGANIZATION_PARTICIPANTS 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

• Acos Aco Participants And Snf Affiliates Methodology

Frequently asked questions

How often is Accountable Care Organization Participants updated?

Annually. CMS last published this feed on 2026-02-04, and Dataplex loaded it to the warehouse the same day. New releases are added automatically when CMS publishes them.

What years does Accountable Care Organization Participants cover?

2022 through 2026 — five 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 Accountable Care Organization Participants?

124,488 rows across all eight reporting periods. Because this feed is time-partitioned, the full table total is the meaningful count — no deduplication needed.

How do I get Accountable Care Organization Participants 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.ACCOUNTABLE_CARE_ORGANIZATION_PARTICIPANTS directly — no pipeline setup required.

Related feeds

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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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Part of the CMS Data Feeds Dataset — 280+ feeds · 245B+ records · updated daily. Back to the full catalog →