In November 2020, in fact, after losing the November 2020 election, the first Trump administration issued a rule about Medicare drug pricing, which may have been a version of the most-favored-nation pricing concept. However, this never went into effect. Remind me what happened to it.Was it thrown out in court or was it simply discontinued by the soon incoming Biden administration.
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The "Most Favored Nation" (MFN) drug pricing rule proposed by the Trump administration in November 2020 aimed to align U.S. Medicare Part B drug prices with the lowest prices paid by other developed countries. However, this policy faced significant legal and administrative challenges that prevented its implementation.Reuters+4AP News+4Politico+4The Daily Beast
Legal Challenges and Court Injunctions
Shortly after the rule's announcement, it was met with multiple lawsuits from the pharmaceutical industry and provider groups. Critics argued that the rule was introduced without following proper administrative procedures, particularly the requirement for a notice-and-comment period under the Administrative Procedure Act. In December 2020, a federal judge issued a nationwide preliminary injunction, effectively halting the rule's implementation due to these procedural shortcomings .Healio
Biden Administration's Decision to Rescind
Upon taking office, the Biden administration chose not to defend the MFN rule in court. Instead, the Centers for Medicare & Medicaid Services (CMS) formally rescinded the rule in January 2022. The decision cited the ongoing legal challenges and concerns raised by stakeholders, including potential negative impacts on providers and patient access to medications .340B Report+1Politico+1CBS News+1Fierce Healthcare+1
Conclusion
In summary, the MFN drug pricing rule was initially blocked by a federal court due to procedural issues and was subsequently withdrawn by the Biden administration. Therefore, it was both legally halted and administratively discontinued.
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But the CMMI is created by a regulation from the affordable care act., Which allows it to wave any existing Medicare regulation or law for the purpose of the demonstration. Congress did not define what demonstration meant. So it seems like the CMMI has a truly impressive amount of statutory leeway granted directly by Congress.
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You're absolutely right—the Center for Medicare and Medicaid Innovation (CMMI) was established under Section 1115A of the Affordable Care Act (ACA) with unusually broad statutory authority. Here's a breakdown of how expansive that authority is, and why it's legally and politically significant:
1. Origin and Broad Mandate
CMMI was created to test "innovative payment and service delivery models" aimed at reducing expenditures while preserving or enhancing quality. Critically, Congress explicitly empowered CMMI to waive most existing Medicare and Medicaid statutes for the purpose of its models (§1115A(d)(1)).
2. Undefined Terms: “Model” and “Demonstration”
Congress did not define “demonstration” or place firm limits on duration, scope, or geographic reach, enabling models that:
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Affect entire national programs (e.g., MFN or radiation oncology model),
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Last for many years (e.g., ACO REACH),
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Change provider reimbursement rates en masse,
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Or even override existing CMS reimbursement formulas.
This lack of definition has allowed CMMI to stretch the term “demonstration” into nationwide policy changes with billion-dollar impacts—arguably legislative in scope.
3. Judicial Review Is Constrained
Section 1115A limits judicial review of CMMI’s choices regarding:
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Model selection,
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Model scope and duration,
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The waiver of statutes or regulations.
This means courts generally can’t second-guess whether a CMMI model is “too big” or “not really a demonstration.” However, courts can still block CMMI models on procedural grounds, such as violations of the Administrative Procedure Act (APA)—as occurred with the MFN rule, which was issued without notice-and-comment.
4. The MFN Rule: Why It Still Failed
The MFN model was issued as an “interim final rule”—which is only allowed when “good cause” exists to skip public comment. The court found no valid good cause, so it enjoined the rule. But crucially, the court did not challenge the CMMI’s authority to do a nationwide price-control demo. Instead, it blocked the rule for failing to follow process.
5. Political and Policy Tensions
The breadth of CMMI’s power is politically contentious. Critics argue:
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It functions like a “mini-Congress” inside CMS.
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It allows massive policy changes without Congressional input.
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The lack of limits could exceed the nondelegation doctrine if tested.
Proponents argue:
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Congress deliberately granted this leeway to spur system-wide innovation,
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And statutorily required CMMI to implement successful demos without further legislative action.
Would you like a summary of recent proposals to reform or rein in CMMI authority, or an outline of other major models that tested the edge of its powers?
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So if the most favorite nations rule had been issued with 30 or 45 days of public notice and comment, and the agency responded to those comments in a rational way, the rest of the statute seems to leave the result nearly unassailable.
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Yes—that’s precisely the legal consensus.
If the Trump administration’s Most Favored Nation (MFN) rule had been issued with the proper notice-and-comment period under the Administrative Procedure Act (APA)—typically 30 or 60 days—and if CMS/CMMI had then responded to public comments in a reasoned and non-arbitrary manner, the courts would likely have upheld it.
Here’s why:
1. CMMI’s Statutory Authority Is Very Broad
Under Section 1115A of the Affordable Care Act:
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CMMI may waive any Medicare statute or regulation “as necessary solely for purposes of testing a model.”
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Judicial review is explicitly barred on:
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The selection of models,
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The scope, duration, and number of participants,
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And the waiver of statutory requirements.
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So long as the model stays within the guardrails of reducing costs without harming quality—and follows administrative procedure—it is nearly immune from substantive judicial challenge.
2. The MFN Rule Failed on Procedural, Not Substantive Grounds
The court injunction in late 2020 rested on the fact that:
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The MFN model was issued as an Interim Final Rule with no public comment period.
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The agency claimed “good cause” to skip comment, but the court ruled that wasn’t justified.
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Thus, the court didn’t reject the content of the rule—only the lack of process.
Had CMS issued the same rule via normal rulemaking with a comment period, courts likely would not have had jurisdiction to second-guess the design or scope.
3. Result: An Enormous, Nearly Bulletproof Authority—If Properly Deployed
So yes, if CMS had followed APA norms:
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The international price indexing model could have affected drug prices nationally,
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Overridden existing statutorily defined reimbursement formulas in Medicare Part B,
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And done so without further Congressional approval.
This startling breadth of leeway stems from a few lines in §1115A—and is exactly why some policymakers now argue for CMMI reform, especially to clarify limits or require Congressional oversight for large-scale models.
Would you like a short side-by-side of the MFN model vs. Biden’s Inflation Reduction Act drug pricing approach?
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Well, let’s hold on whether it’s completely bulletproof. On its own terms, as a statute, 1115A is unassailable. However, one could easily raise the argument that it’s an unconstitutional degree of delegation of authority from Congress to an agency.
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Exactly—and you’ve landed on the core constitutional tension: even if Section 1115A is bulletproof under statutory interpretation, it may still be vulnerable under the nondelegation doctrine.
Here’s the situation in structured terms:
1. Statutory vs. Constitutional
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Statutorily, CMMI has vast power: §1115A allows it to waive key Medicare laws, implement national-scale “models,” and avoid judicial review of its discretion.
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But constitutionally, this raises eyebrows. The nondelegation doctrine holds that Congress cannot delegate legislative power to the executive branch without an “intelligible principle” to guide that delegation.
2. Why CMMI Might Cross the Line
CMMI’s authority allows:
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Overriding core Medicare statutes (e.g., pricing rules set by Congress),
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National rollouts without further legislation,
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Indefinite continuation of successful models,
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No hard cap on model scope or impact.
This is arguably a delegation of legislative power with only the vaguest of limits—“reduce costs without impairing quality”—which some scholars argue fails to meet the “intelligible principle” standard.
3. Precedents and the Reawakening of the Doctrine
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The nondelegation doctrine has been largely dormant since the 1930s.
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But in Gundy v. United States (2019), Justice Gorsuch signaled interest in reviving it, joined by Roberts and Thomas.
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In West Virginia v. EPA (2022), the Court applied the related major questions doctrine—requiring clear congressional authorization when agencies take actions of vast political and economic significance.
A future court could use West Virginia-like reasoning to say:
“You can’t restructure national Medicare pricing with vague statutory language under the label of a 'demonstration model.’ That’s a major policy decision reserved for Congress.”
4. So: Vulnerable Under What Legal Theories?
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APA procedural errors (already happened in MFN)
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Nondelegation doctrine (revival potential)
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Major questions doctrine (already active)
Conclusion
You’re right to be cautious. While Section 1115A looks unassailable “on its own terms,” its sheer scope may provoke a constitutional check—especially now that the Supreme Court has shifted toward reining in administrative power. A well-funded challenge under the major questions or nondelegation doctrines could very plausibly reach the Supreme Court and succeed.
Would you like a short memo outlining how a litigant might frame such a challenge today?
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As a footnote, we could note that CMS never issued any regulations about the implementation of the 1115A. Like the greater part of the affordable character, it is treated as self implementing.
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es, and that’s a very insightful and telling footnote.
Footnote: Despite its sweeping implications, Section 1115A of the Affordable Care Act—authorizing the Innovation Center—was never implemented through formal CMS regulations. Like much of the ACA, it has been treated as self-executing, with the agency proceeding via subregulatory guidance and model-specific rulemaking rather than issuing a comprehensive regulatory framework to define its scope, procedures, or boundaries. This absence of interpretive regulation leaves CMMI’s authority remarkably open-ended and may amplify constitutional concerns under doctrines such as nondelegation or major questions.
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CMMI has offered some models through rulemaking, but the majority of the hundreds of projects have not gone through rulemaking. I’m not sure there’s any black letter definition of which is which.
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That’s correct—and it highlights another subtle but critical structural ambiguity in how CMMI operates.
While some high-impact models (like MFN or Radiation Oncology) have gone through notice-and-comment rulemaking, the vast majority of CMMI models—well over 90%—have been launched without formal rulemaking, instead using:
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Model participation agreements,
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Request for applications (RFAs),
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And subregulatory guidance documents issued through CMS Innovation Center channels.
There is no black-letter threshold—in statute or regulation—that defines which CMMI models require rulemaking and which do not. Instead, the decision appears to be based on internal CMS discretion, weighing factors such as:
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The breadth of impact (number of providers or beneficiaries),
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Whether the model involves mandatory participation or payment changes,
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Or whether it directly contradicts existing Medicare payment rules.
This ambiguity creates a regulatory gray zone, where major programmatic shifts can occur:
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Without judicial review (per §1115A(f)),
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Without Congressional oversight,
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And often without public comment.
This regulatory ambiguity is not accidental—it reflects the ACA’s policy architecture, which intentionally enabled CMMI to be flexible and rapid in testing models. But it also raises serious concerns about transparency, due process, and democratic accountability—especially when models move from “experiments” to quasi-permanent nationwide policies.
Would you like a text version of this for inclusion in a white paper or op-ed?
YES
CMMI Implementation Pathways: Rulemaking, Subregulatory Action, and Constitutional Implications
The Center for Medicare and Medicaid Innovation (CMMI), established by Section 1115A of the Social Security Act (added by §3021 of the Affordable Care Act), 42 U.S.C. § 1315a, was granted broad authority by Congress to test innovative payment and service delivery models within Medicare and Medicaid. As enacted, the statute permits CMMI to waive nearly any provision of Medicare law and regulation “solely for purposes of testing a model,” and requires the Secretary to expand successful models nationwide without further congressional approval. In addition, 42 U.S.C. § 1315a(d)(2) limits judicial review over key decisions, including the selection of models, their scope and duration, and statutory waivers.
While some prominent and controversial models—such as the Most Favored Nation (MFN) model (85 Fed. Reg. 76180, Nov. 27, 2020) and the Radiation Oncology (RO) model (85 Fed. Reg. 71416, Sept. 29, 2020)—have gone through formal notice-and-comment rulemaking, the vast majority of CMMI's over 100 demonstration projects have not. Instead, they are rolled out through subregulatory mechanisms, including Requests for Applications (RFAs), Model Participation Agreements, and informal technical guidance documents posted to CMS websites. There is no codified legal standard in the ACA or subsequent regulation that defines which types of models require APA-compliant rulemaking and which do not. The distinction appears to rest solely on internal agency discretion, possibly guided by informal factors such as the size of the affected population, whether participation is mandatory, or whether the model disrupts existing statutory payment structures.
This patchwork implementation approach raises serious administrative and constitutional concerns. From an administrative law perspective, the lack of consistent rulemaking undermines transparency and stakeholder participation, especially when models alter reimbursement policies for broad swaths of providers and patients. From a constitutional standpoint, the breadth of CMMI’s authority—combined with the absence of a clear limiting principle—implicates the nondelegation doctrine, which prohibits Congress from transferring its legislative powers to executive agencies without an "intelligible principle" (Gundy v. United States, 588 U.S. ___ (2019)). Although courts have historically been deferential, the doctrine has seen renewed interest from members of the Supreme Court, particularly in contexts where the agency's actions have significant political and economic consequences.
The issue is compounded by the major questions doctrine, formally articulated in West Virginia v. EPA, 597 U.S. ___ (2022), which requires clear congressional authorization when agencies take actions of vast scope and consequence. A nationwide pricing policy—such as MFN—substantially altering statutory Medicare Part B reimbursement formulas arguably meets this threshold. The fact that such a model could be enacted without rulemaking, without judicial review, and without additional congressional authorization suggests that CMMI’s authority may be vulnerable to constitutional challenge, even if it remains secure under existing statutory interpretation.
In sum, while Section 1115A provides CMMI with an expansive statutory mandate, the Center’s preference for subregulatory implementation—combined with the scale of some of its models—raises pressing questions about procedural fairness and constitutional boundaries. As courts grow more attentive to structural limits on agency power, CMMI’s flexible, self-implementing framework may no longer remain immune to serious scrutiny.
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