H.R. 8129

119 HR 8129 IH: To amend title XVIII of the Social Security Act to establish a full risk ACO program.
 U.S. House of Representatives
 2026-03-26
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 I  119th CONGRESS  2d Session  H. R. 8129  IN THE HOUSE OF REPRESENTATIVES   March 26, 2026   Ms. Tenney  (for herself and  Mr. Schneider ) introduced the following bill; which was referred to the  Committee on Ways and Means , and in addition to the Committee on  Energy and Commerce , for a period to be subsequently determined by the Speaker, in each case for consideration of such provisions as fall within the jurisdiction of the committee concerned   A BILL
To amend title XVIII of the Social Security Act to establish a full risk ACO program.
1.
Full Risk ACO Program
Title XVIII of the Social Security Act ( 42 U.S.C. 1395 et seq. ) is amended by adding at the end the following new section:
1899B.
Full Risk Accountable Care Organization Program
(a)
Findings
Congress finds as follows:
(1)
Successful pilots over the last decade have demonstrated that full risk accountable care organizations (ACOs), including full risk ACOs that focus on a complex care population are successful at improving health outcomes while lowering costs in traditional Medicare.
(2)
Traditional Medicare lacks a permanent program that allows providers flexibility to engage in full risk models outside of time-limited pilot projects.
(3)
A wide range of organizations serving a range of traditional Medicare beneficiaries, including rural and underserved areas, would benefit from permanent options for full risk accountable care.
(4)
Full risk models can transform care by allowing more flexible and diverse payment options beyond fee-for-service reimbursement, impact cash flow, and tailor experiences for clinicians and beneficiaries.
(5)
ACO options must encourage better care coordination for complex care beneficiaries, those with six or more chronic conditions.
(b)
Establishment
By June 30, 2026, the Secretary shall establish a full risk ACO program (in this section referred to as the  program ) that adopts proven provider incentives to deliver high-quality care to better meet the needs of Traditional Medicare beneficiaries (as defined in subsection (l)). Under such program—
(1)
groups of health care professionals shall work together to manage and coordinate care for Medicare fee-for-service beneficiaries through a  standard  or  complex care  full risk ACO.
(2)
providers and suppliers participating in this program shall be paid in a manner that incentivizes furnishing items and services in such practice to provide high-quality care tailored to meet the needs of Medicare fee-for-service beneficiaries while reducing the cost of care.
(c)
Full risk ACO program with standard and complex care track options
(1)
In general
An ACO participating in this program is a group of providers and suppliers focused on individualizing care to meet the specific needs of Traditional Medicare beneficiaries by emphasizing advanced primary care, care coordination, and the delivery of care in alternate settings for beneficiaries needing medical and nonmedical assistance in managing their health.
(2)
Requirements
In order to participate in the program under this program, an ACO:
(A)
Must be formed by the following ACO participants or combinations of ACO participants, consistent with the Medicare Shared Savings Program:
(i)
ACO professionals in group practice arrangements.
(ii)
Networks of individual practices of ACO professionals.
(iii)
Partnerships or joint venture arrangements between hospitals and ACO professionals.
(iv)
Hospitals employing ACO professionals.
(v)
CAHs that bill under Method II (as described in section 413.70(b)(3) of this chapter).
(vi)
RHCs.
(vii)
FQHCs.
(viii)
Teaching hospitals that have elected under section 415.160 of this subchapter to receive payment on a reasonable cost basis for the direct medical and surgical services of their physicians.
(B)
Shall be structured to allow the organization to receive and distribute payments for services and performance incentives to participant and preferred providers and suppliers.
(C)
Shall include a sufficient number and type of providers for the Medicare fee-for-service beneficiaries aligned or assigned to the ACO, as determined by the Secretary.
(D)
Shall serve a required minimum number of aligned and/or attributed beneficiaries.
(i)
A Standard Full Risk ACO shall have at least 2,500 aligned and/or assigned beneficiaries.
(ii)
A complex care full risk ACO shall have at least 250 aligned and/or assigned beneficiaries in the first year; at least 500 aligned or assigned beneficiaries in the second year; and at least 1,000 aligned and/or assigned beneficiaries in the third year and in every participation year after that.
(E)
May establish  preferred provider  relationships, and may pay such providers a portion or all of the provider’s fee-for-service claims in lieu of fee-for-service reimbursement from CMS.
(F)
Shall have a financial guarantee mechanism in place commensurate with the financial arrangement selected in this program.
(G)
Shall enter into an agreement with the Secretary to participate in the program for a five-year period. The agreement may be renewed for additional performance periods.
(H)
Shall permit participation in the program at the TIN-NPI level.
(3)
Clinical services
An ACO participating in this program shall provide individualized care to meet the specific needs of Medicare fee-for-service beneficiaries attributed or aligned to the ACO. This may include the following:
(A)
Coordinated care across the care continuum, including transitions.
(B)
Social support services.
(C)
Behavioral health services.
(D)
Nonvisit-based care (including email, text, phone, video, or other technology).
(E)
Extended care access options and technology platforms enabling patient stratification, outcomes tracking, and practice-based population management.
(F)
In-home care.
(G)
Palliative care.
(H)
Other items and services as determined appropriate by the Secretary.
(4)
Quality and reporting requirements
The Secretary shall develop quality performance standards for full risk ACOs.
(A)
Standard Full Risk ACOs
The Secretary shall deploy a limited set of quality measures that prioritize patient experience and health outcomes while reducing clinician burden.
(B)
Additional Requirement for Quality Performance for Complex Care Full Risk
  ACOs
The Secretary shall deploy the quality measures in (c)(4)(A) and include a Days at Home measure.
(C)
Overlap with Medicare Access and CHIP Reauthorization Act
All full risk ACO program participants shall be exempt from the Merit-Based Incentive Payment System (MIPS).
(5)
Beneficiary communications
The Secretary shall promulgate requirements for ACO marketing to Medicare fee-for-service beneficiaries that educates and informs beneficiaries about their care options.
(d)
Payment arrangements for ACOs, participant and preferred providers
(1)
In general
A full risk ACO is eligible to receive the following payments under the program under this section:
(A)
Primary care capitation
A per-beneficiary, per-month capitated payment for primary care services provided by Participant Providers and preferred providers who have opted into the capitated arrangement with the full risk ACO reflective of the predicted Medicare Part B costs representing professional services for which the ACO is directly responsible. In a given year, such payment may be up to 7 percent of the total health care spending for the beneficiary under this title for the year. The program shall include a repayment mechanism for the primary care capitation to ensure that this does not result in additional Medicare spending.
(B)
Total Care Capitation
A per-beneficiary, per-month capitated payment for all Medicare Part A and Part B services provided to aligned beneficiaries by all Participant Providers and by preferred providers who have opted into the capitated arrangement. The TCC payment amount will reflect the estimated total cost of care for the full risk ACO’s aligned population for services provided by the providers participating in the capitation mechanism. Providers that elect to participate in Total Care Capitation will agree to a 100 percent reduction of their fee-for-service claims.
(C)
Option for Claims Reduction and Population-Based Payment
Full Risk ACOs can enter into arrangements whereby CMS would reduce claims payments for aligned beneficiaries for Participant and Preferred Providers and CMS would make a monthly payment to the ACO equivalent to the estimated value of the FFS claims reductions for those services.
(2)
Financial arrangements
(A)
In general
This program shall offer full financial risk for participant ACOs.
(B)
Financial arrangements
The Secretary shall make multiple financial arrangements available to ACOs, reflecting varying experience with and ability to assume risk for Medicare fee-for-service beneficiaries. The Secretary shall make one or more financial arrangements available to ACOs under both of the following solutions:
(i)
Full risk arrangement
ACOs participating in full risk arrangements shall share in 100 percent of savings and losses, subject to a discount and risk corridors.
(ii)
Discount
The Secretary shall determine and apply a discount to the full risk ACO’s benchmark.
(C)
Benchmark for standard full risk acos
The benchmark for Standard Full Risk ACOs shall be developed by—
(i)
calculating the ACOs historical baseline spending for its aligned beneficiary population;
(ii)
trending the historical baseline expenditures forward based on an adjusted version of the U.S. Per Capita Cost growth trend;
(iii)
blending the historical baseline expenditures with regional expenditures using an adjusted Medicare Advantage rate book;
(iv)
risk adjust the blended expenditures; and
(v)
apply the discount.
(D)
Benchmark for Complex Care Full Risk ACOs
The benchmarking methodology for Complex Care Full Risk ACOs shall be developed separately, taking into account the appropriate weighting of the regional component (at least half) and remove the ceiling on the regional blend.
(E)
Risk Corridors
The Secretary shall develop risk corridors appropriate to this program.
(e)
Risk adjustment
(1)
Prospective risk adjustment
Subject to paragraph (2), the Secretary shall use prospective risk adjustment for a standard full risk ACO. Risk adjustment methodologies should be identical to Medicare Advantage to the extent practical.
(2)
Concurrent risk adjustment for complex care full risk ACO
The Secretary shall use concurrent risk adjustment to adjust the benchmark for a complex care full risk ACO.
(f)
Beneficiary assignment
(1)
In general
Full Risk ACO program participants shall use the Medicare Shared Savings Program alignment and assignment methodologies, including a choice of prospective assignment or prospective assignment with retrospective reconciliation.
(2)
Signed Voluntary Alignment
In addition to the methodology in subsection (f)(1), Standard and Complex Care Full Risk ACOs shall be permitted to use signed voluntary alignment. Such alignment shall take effect on a monthly basis.
(3)
Opt-out
Medicare beneficiaries shall have the ability to opt out of participating in the full risk ACO program.
(g)
Waivers
The Secretary may waive such provisions of this title and title XI as the Secretary determines necessary in order to implement the demonstration program.
(h)
Data
The Secretary shall provide to program participants under this section regular reports with up-to-date provider claims data and payment information with respect to Medicare fee-for-service beneficiaries attributed or aligned in the ACO and shall provide other data to ACOs as necessary.
(i)
Treatment under the medicare access and CHIP Reauthorization Act
An ACO participating in this program shall be considered an  advanced alternative payment model .
(j)
Definitions
In this section:
(1)
Concurrent risk adjustment
The term  concurrent risk adjustment  means a risk adjustment model that uses current year diagnoses, demographics, and other factors to predict cost in that same year.
(2)
Medicare fee-for-service beneficiary
The term  Medicare fee-for-service beneficiary  means an individual who is enrolled in the original Medicare fee-for-service program under parts A and B and is not enrolled in a Medicare Advantage plan under part C, an eligible organization under section 1876, or a PACE program under section 1894.
(3)
Physician
The term  physician  means a physician as defined in section 1861(r)(1).
(4)
Standard full risk ACO
The term  standard full risk ACO  means an ACO composed of Medicare fee-for-service beneficiaries, less than two-thirds of which have six or more chronic co-morbidities.
(5)
Complex care full risk ACO
The term  complex care full risk ACO  means an ACO composed of Medicare fee-for-services beneficiaries, at least two-thirds of which have six or more chronic co-morbidities.
 .