data.cms.govHand-written summary
Accountable Care Organization Participants
Participants in Medicare Shared Savings Program ACOs, with name, track, years in the program and key contacts.
Freshness
- Last posted
- Period covered
- Jan 1, 2026 to Dec 31, 2026
- Update frequency
- Annually
Dates as CMS lists them in its catalog.
Columns 31
| Column | What it means | Type |
|---|---|---|
ACO IdentifierACO_ID | ACO Identifier. Identifier is unique for each ACO | string |
Participant Legal Business NamePar_LBN | Legal Business Name of ACO Participant | string |
ACO NameACO_Name | When available, ACO's Doing Business As (DBA) Name. If not available, ACO's Legal Business Name (LBN) | string |
State(s) where assigned beneficiaries resideACO_Service_Area | State(s) with counties where greater than 1% of assigned beneficiaries reside | string |
Agreement Period NumberAgreement_Period_Num | Agreement period number this ACO is currently participating in | number |
Initial Agreement Start DateInitial_Start_Date | Agreement start date (for initial agreement period) | date |
Current Start DateCurrent_Start_Date | Agreement renewal date (for ACOs who have successfully renewed for a second or subsequent agreement period) | date |
Re-entering ACORe-entering_ACO | 0/1 flag; =1 if re-entering ACO; otherwise 0 | number |
BASIC_TrackBASIC_Track | 0/1 flag; =1 if ACO selected BASIC track; otherwise 0 | number |
BASIC_Track_LevelBASIC_Track_Level | BASIC track levels (A, B, C, D, or E) if BASIC_Track is equal to 1; otherwise N/A | string |
ENHANCED_TrackENHANCED_Track | 0/1 flag; =1 if ACO selected ENHANCED track; otherwise 0. Track 3 was renamed the ENHANCED track and is accounted for under this variable | number |
High_Revenue_ACOHigh_Revenue_ACO | 0/1 flag; =1 if ACO is classified as a high revenue ACO; otherwise 0 | number |
Low_Revenue_ACOLow_Revenue_ACO | 0/1 flag; =1 if ACO is classified as a low revenue ACO; otherwise 0 | number |
Advance PayAdv_Pay | 0/1 flag; =1 if ACO selected to participate in the Advance Pay program; otherwise 0 | number |
ACO Investment ModelAIM | 0/1 flag; =1 if ACO selected to participate in AIM; otherwise 0 | number |
Advance Investment PaymentsAIP | 0/1 flag; =1 if ACO selected to participate in AIP; otherwise 0 | number |
Prepaid Shared SavingsPSS | 0/1 flag; =1 if ACO selected to participate in PSS; otherwise 0 | number |
Skilled Nursing Facility 3-Day Rule WaiverSNF_3-Day_Rule_Waiver | 0/1 flag; =1 if ACO was approved for SNF 3-Day Rule Waiver; otherwise 0 | number |
Prospective AssignmentProspective_Assignment | 0/1 flag; =1 if prospective beneficiary assignment methodology; otherwise 0 | number |
Retrospective AssignmentRetrospective_Assignment | 0/1 flag; =1 if preliminary prospective with retrospective reconciliation beneficiary assignment methodology; otherwise 0 | number |
ACO AddressACO_Address | string | |
ACO Public Reporting WebsiteACO_Public_Reporting_Website | string | |
ACO Executive NameACO_Exec_Name | string | |
ACO Executive EmailACO_Exec_Email | string | |
ACO Executive PhoneACO_Exec_Phone | number | |
ACO Public Reporting Contact NameACO_Public_Name | string | |
ACO Public Reporting Contact EmailACO_Public_Email | string | |
ACO Public Reporting Contact PhoneACO_Public_Phone | number | |
ACO Compliance Contact NameACO_Compliance_Contact_Name | string | |
ACO Medical Director NameACO_Medical_Director_Name | string | |
pc_flex_agreement_statuspc_flex_agreement_status | number |
No column matches that filter.
At a glance
- Catalog
- data.cms.gov
- Publisher
- Office of Enterprise Data and Analytics (OEDA)
- Rows
- 15,370
- Columns
- 31
- State column
ACO_Service_Area
API
Free, no key needed. This request returns the first 10 rows as JSON:
https://data.cms.gov/data-api/v1/dataset/9767cb68-8ea9-4f0b-8179-9431abc89f11/data?size=10
To keep only one state, filter on the ACO_Service_Area column.
Versions 14
The newest version is the one linked above. Older releases stay on the official site.
- 2026-01-01posted Feb 4, 2026
- 2025-02-01posted Sep 10, 2025
- 2024-01-24posted Jan 29, 2024
- 2023-01-13posted Mar 6, 2023
- 2022-01-01posted Jan 26, 2022
- 2021-01-11posted Jan 27, 2022
- 2020-01-15posted Jan 27, 2022
- 2019-07-31oc1posted Jan 29, 2024
Show 6 older versions
- 2019-01-01posted Jan 27, 2022
- 2018-01-01posted Jan 27, 2022
- 2017-01-01posted Jan 27, 2022
- 2016-12-31posted Jan 27, 2022
- 2015-12-31posted Jan 27, 2022
- 2014-12-31posted Jan 27, 2022
CMS's description
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.
Methodology and other documents from CMS:
The summary at the top was written by hand from this description. Record id cms:9767cb68-8ea9-4f0b-8179-9431abc89f11. This record as JSON.