Voluntary alignment gives ACOs a way to recognise beneficiary relationships that claims-based alignment may not capture. For operations and growth teams, the opportunity depends on a complete process: identifying eligible patients, collecting a signed voluntary alignment form, processing responses, and reconciling submissions against CMS alignment results.

The Long-term Enhanced ACO Design (LEAD) model launches January 1, 2027. Its hybrid option creates monthly opportunities to add voluntarily aligned beneficiaries, compared with quarterly updates under ACO REACH’s option. That shorter interval makes timely response processing more useful and gives teams a reason to review their current capacity.

Mabel’s voluntary alignment service supports campaign execution, response processing, submission preparation, and auditing. This article explains the workflow and provides practical criteria for deciding which functions an ACO can manage internally and when specialist support is worthwhile.

What LEAD Changes for Voluntary Alignment

LEAD and ACO REACH are CMS Innovation Center models with their own participation terms and alignment methodologies. MSSP operates under 42 CFR Part 425 and also supports voluntary alignment through Medicare.gov. Its rules should not be used as a substitute for LEAD’s signature-based workflow.

Under CMS’s LEAD alignment methodology, beneficiaries can designate a participating provider through Medicare.gov Voluntary Alignment (MVA) or Signature-based Voluntary Alignment (SVA). CMS incorporates MVA automatically; an ACO chooses whether to participate in SVA. Electronic forms and signatures are acceptable under the specified SVA conditions.

The timing election is separate. Prospective alignment determines the population before the performance year, while hybrid alignment supports eligible monthly voluntary additions and a separate mid-year process for newly added Participant TINs. Monthly submissions are therefore an opportunity under hybrid alignment, not a universal requirement for every LEAD ACO.

CMS’s LEAD overview describes a ten-year model without periodic financial rebasing. That planning horizon supports investment in repeatable operations, but a designation does not guarantee that an individual beneficiary remains aligned for ten years. Eligibility and CMS alignment determinations continue to matter.

Planning Around Eligibility and Submission Dates

For PY2027, the pre-implementation period runs September 15 through December 31, 2026. CMS specifies October 23, 2026 as the deadline for SVA information supporting alignment effective January 1, 2027. Treat the initial effective-date cutoff and the broader pre-implementation period as separate calendar entries.

Under hybrid alignment, subsequent SVA information must be submitted at least 45 calendar days before the applicable month begins. The Participant TIN add window runs December 14, 2026 through January 14, 2027, with alignment associated with those additions effective April 1. CMS’s submission and alignment schedule distinguishes these processes.

Before outreach, check the beneficiary population against the applicable eligibility and service-area requirements, and reconcile the designated provider against the participating roster. A patient’s presence in an EHR is not, by itself, proof that the patient can be aligned for the intended period.

For REACH beneficiaries whose SVA carries into LEAD, include the model’s transition notification requirements in the implementation plan. Keep that workstream separate from collecting new designations.

From Beneficiary Outreach to Confirmed Alignment

Identify the opportunity: Compare the eligible provider panel with current alignment information, resolving duplicate records and inconsistent identifiers before creating a campaign list. Segment by practice, contact information, language needs, and prior response status.

Collect a signed SVA form: Use approved campaign materials that identify the participating provider and explain what the beneficiary is choosing. Coordinate mail, email, and in-clinic outreach around the same patient record to avoid duplicative efforts.

Validate the response: Check the Medicare Beneficiary Identifier, provider identifiers, signature, date, and other required fields against the applicable specifications. Preserve the original response and record any correction workflow; do not silently change what the beneficiary designated.

Prepare and submit the file to CMS: Use the model’s current submission instructions and file specifications. “4i” names a CMS system, not a universal quarterly file format. Confirm the required LEAD submission process before adapting a REACH procedure, and assign responsibility for both preparation and the actual submission.

Reconcile the outcome: Separate a returned form, a validated designation, a submitted record, and a confirmed net-new alignment in campaign reporting. Investigate rejected or unmatched records and determine whether an internal data correction or beneficiary follow-up is appropriate.

Mabel’s service description covers the full voluntary alignment lifecycle: outreach, response processing, submission preparation, and auditing support. In a vendor review, ask to see how one beneficiary’s record moves through these stages and how unresolved records are returned to the ACO.

When to Keep Voluntary Alignment In-House—and When to Outsource

Running voluntary alignment internally is possible for an ACO with a stable practice network, trained staff, and a proven track record of clean submissions — but “possible” and “efficient” aren’t the same thing. Even ACOs that hit all four conditions typically dedicate 1 to 5 FTEs to a process that runs on CMS’s calendar, not theirs, and a single missed 45-day window or malformed MBI field turns into a beneficiary who doesn’t get aligned until the following cycle.

The tradeoffs to evaluate:

Staff capacity. Estimate weekly response volume × handling time, then add validation, corrections, submission prep, and reconciliation on top. Most teams underbudget this by counting only the “form processing” step and missing the surrounding work — practice coordination, correction loops, and audit-trail upkeep are usually the larger time sink, not the initial data entry.

Processing quality. A rejected voluntary alignment form isn’t just a lost beneficiary — under LEAD’s monthly hybrid cadence, it’s a lost month, since a missed submission window pushes that beneficiary to the next cycle. Mabel’s platform holds preventable form-processing errors (V0–V2) under 1%; ask any vendor you’re evaluating, including your own team’s historical rate, to produce the same number before comparing options.

Practice coordination. The more provider groups, roster formats, and intake channels involved, the more this becomes a coordination problem rather than a data-entry one — and coordination overhead scales faster than headcount typically does. This is where in-house processes tend to slow down first, well before staff capacity runs out.

Cost and outcomes. Compare fully loaded internal cost against a vendor’s complete price — implementation, campaign production, postage, processing — using cost per confirmed net-new alignment as the common denominator. Internal cost estimates often exclude the management time spent supervising the process, which understates the true comparison.

Implementation readiness and audit access. A platform that centralizes campaign execution, response processing, submission, and reconciliation gives an ACO one place to retrieve a beneficiary’s full record during an audit — the alternative is reconstructing that trail across email threads, spreadsheets, and whatever the practice kept on file. Ask any vendor how quickly they can produce that record for a single beneficiary on request, and how it compares to your team’s current retrieval time.

If your team is running this internally today, the honest first step is running these five checks against your own numbers — not against a vendor’s pitch. If the math points toward outsourcing, Mabel handles the full lifecycle, from campaign execution through CMS submission and audit-ready record retrieval for 1 in 3 ACOs, and can walk through what that looks like against your specific practice network and volume.

What This Looks Like in Practice

Mabel’s ACO REACH case study reports a 30% increase in net-new alignments over 12 months after an organization adopted coordinated outreach, response processing, and alignment tracking. The intervention covered several stages, so the result should not be attributed to data-entry improvements alone.

The case-study page also describes an analysis of more than 100,000 fee-for-service lives across several ACO REACHs, where about 40% of eligible beneficiaries were claims-aligned. That is a separate population analysis, not the established panel size of the individual case-study customer.

For an outsourcing discussion, use these reported results to ask more specific questions: Which campaign channels contributed? How were net-new alignments counted? What internal work remained? How would the proposed process handle the ACO’s own beneficiary mix and practice network?

Building a Voluntary Alignment Process That Fits Your ACO

A sound voluntary alignment process connects beneficiary choice with accurate records, timely submissions, and confirmed outcomes. LEAD’s monthly hybrid opportunities make that connection especially useful for ACOs growing their participating populations throughout the year and for new entrant ACOs that need to meet minimum thresholds.

Before comparing vendors, assemble the current workflow, expected response volume, processing costs, error categories, and division of responsibilities. That gives both the ACO and prospective partners a concrete basis for evaluating support.

Mabel can help teams assess campaign execution, response processing, and submission preparation against their operating needs. Schedule a conversation with Mabel to review your current process and the functions your team wants to strengthen.

Frequently Asked Questions

Does voluntary alignment restrict which providers a beneficiary can see?

No. Beneficiaries retain their Original Medicare freedom to choose providers. CMS’s ACO REACH FAQs explain that alignment does not require beneficiaries to receive all their care from the ACO. Outreach should make this clear and avoid describing voluntary alignment as enrollment in a restricted provider network.

Keep the model’s beneficiary notices and the designation workflow distinct. A notice explaining ACO participation is not itself a completed voluntary alignment designation.

Are ACOs allowed to offer beneficiaries an incentive to complete a voluntary alignment form?

Do not offer a payment, gift, or other reward for signing a form without establishing that the specific arrangement is permitted under the applicable model terms and law. LEAD’s benefit enhancements and beneficiary engagement incentives have defined conditions; their existence does not authorise a general reward for completing SVA.

The ACO should review any proposed offer against CMS’s LEAD participation terms before including it in campaign materials. Explain only benefits that apply to the relevant ACO and beneficiary, and preserve the beneficiary’s ability to make a voluntary choice.

Do newly entering LEAD ACOs have to meet the full aligned-beneficiary minimum immediately?

No. CMS’s threshold schedule allows Newly Entering ACOs to begin at 1,000 aligned beneficiaries in PY1 and reach 5,000 by PY5. The applicable claims-based base-year minimum increases from 600 to 3,000 over that period. Standard ACOs have different starting requirements, and qualifying High Needs/ESRD populations have separate provisions.

Do not interpret the two thresholds as a required 60% claims/40% voluntary composition of the current population: the base-year and performance-year tests measure different things. Confirm the ACO’s category before forecasting the voluntary alignment volume it may need.

Can ACOs still apply to participate in the LEAD model?

The application deadline for the initial cohort was May 17, 2026. CMS’s LEAD FAQ describes future application opportunities, with details to be announced. Organizations considering a later cohort should follow CMS’s published updates and distinguish an expression of interest from a completed participation application.

For an organization preparing for PY2027, the immediate operational task is implementation: establishing campaign inputs, responsible staff, processing checks, and the relevant submission calendar.

Can a beneficiary designate a specialist, rather than a primary care physician, through voluntary alignment?

Under LEAD, a beneficiary designates a Participant Provider as their primary clinician, subject to the model’s requirements. The process is not limited to choosing a physician whose specialty is primary care. However, a designation must identify an eligible participating provider; it is not valid merely because the beneficiary has seen a specialist.

Use CMS’s voluntary alignment definitions and the current Participant TIN/provider roster to validate the designation. Do not substitute MSSP’s regulatory definitions for LEAD’s provider and attestation requirements.

How long must ACOs retain records related to voluntary alignment activity?

Use the applicable model participation agreement and CMS recordkeeping requirements to establish retention, audit access, and any extension or legal-hold obligations. A vendor’s stated storage period should be checked against those obligations and the ACO’s ability to retrieve records after the contract ends.

For comparison, MSSP’s record-retention rule generally requires retention for ten years from the end of the agreement period or completion of an audit, evaluation, or inspection, whichever is later, with specified extensions. That MSSP rule should not be presented as the governing LEAD provision.

Document the retention schedule, responsible owner, export process, and handling of records subject to an unresolved audit or dispute.