Each year, the CMS Advance Notice signals where Medicare Advantage policy is heading. But the CY 2027 Advance Notice released in early 2026 carries implications that extend far beyond payment updates. Beneath the headline rate changes lies a deeper shift in how CMS expects diagnoses to be captured, validated, and defended.
For health plans, provider organizations, and risk adjustment leaders, the message is clear: RAF accuracy in 2026 will depend less on retrospective correction and more on encounter-level documentation integrity.
Although the Advance Notice is not final until the CMS Rate Announcement is published by April 6, 2026, organizations that wait until then to respond may already be behind. The proposals outlined now provide a roadmap for how CMS intends to evaluate risk adjustment accuracy moving forward—and they point toward a more prospective, evidence-driven model of documentation.
At first glance, the Advance Notice appears primarily financial. CMS projects a modest net payment impact for Medicare Advantage plans, with an estimated average payment increase once underlying trends are included. However, the operational implications sit beneath those topline numbers.
CMS proposes to:
Continue implementation of the CMS-HCC V28 risk adjustment model
Recalibrate V28 using more recent clinical and expenditure data
Tighten rules governing which diagnoses count toward risk scores
Increase emphasis on encounter-linked documentation support
These proposals reinforce CMS’s ongoing effort to align payment accuracy with clinical reality rather than documentation volume.
The Advance Notice represents proposed policy, not final regulation. CMS will publish the final Rate Announcement in April 2026 after reviewing stakeholder comments.
However, historically, Advance Notices reliably signal directional intent. Organizations that begin operational planning during this window—not after April—are better positioned to adapt workflows before financial impacts materialize.
The real takeaway is not whether individual percentages change slightly in April. It is that CMS continues moving toward documentation models grounded in verifiable clinical encounters.
The most consequential elements of the Advance Notice are not payment adjustments but diagnosis validation expectations.
CMS proposes excluding diagnoses derived from certain unlinked chart review records from risk score calculation beginning in CY 2027, if finalized. The proposal also addresses diagnoses originating from audio-only encounters, signaling increased scrutiny around how clinical evidence is captured.
Together, these changes shift emphasis toward diagnoses supported directly within encounter documentation.
For RAF performance, this represents a structural change. Organizations that historically relied on retrospective chart review or disconnected documentation sources may experience increased volatility in risk scores.
RAF accuracy becomes less about identifying diagnoses after the fact and more about ensuring documentation completeness at the point of care.
Several operational areas emerge as potential risk zones:
Heavy reliance on retrospective chart review programs
Documentation captured outside encounter workflows
Variability in provider documentation practices
Chronic conditions carried forward without current evidence
As V28 recalibration incorporates newer data, specificity and contemporaneous clinical support become increasingly important. Legacy documentation habits developed under earlier models may no longer perform reliably.
The Advance Notice effectively reframes risk adjustment strategy. Instead of focusing primarily on post-visit validation, organizations must strengthen documentation accuracy earlier in the workflow.
That means shifting toward prospective risk adjustment operations.
A proactive response includes:
Evaluating dependence on retrospective diagnosis sources
Identifying providers with documentation variability
Strengthening encounter-level documentation standards
Improving alignment between clinical workflows and coding outcomes
This transition mirrors a broader industry shift toward operational excellence rather than documentation recovery.
Real-time clinical intelligence allows organizations to reinforce documentation while care is being delivered.
Artificial intelligence can analyze documentation patterns during the encounter, helping ensure diagnoses are supported by appropriate clinical evidence before charts are finalized. Instead of identifying gaps months later, teams address them immediately.
Inferscience solutions support this prospective model through integrated workflow tools:
AI Chart Assistant helps clinicians capture clear, structured documentation without adding steps or disrupting care delivery.
HCC Assistant surfaces risk-relevant conditions and specificity requirements in real time, improving first-pass RAF accuracy.
HCC Validator strengthens defensibility by verifying diagnosis support prior to submission, reducing reliance on retrospective review.
Together, these tools align directly with CMS’s direction toward encounter-anchored documentation integrity.
The recalibration of V28 amplifies documentation precision requirements. Conditions now interact differently within the model, and severity inference depends more heavily on clear clinical evidence.
This means unsupported or ambiguous diagnoses are more likely to fail validation—not because providers are documenting less carefully, but because the model demands greater specificity.
Prospective documentation workflows help organizations meet these expectations by ensuring:
Diagnoses reflect current clinical status
MEAT elements are clearly documented
Clinical reasoning is traceable within the encounter
Rather than increasing administrative workload, real-time reinforcement reduces downstream rework and provider queries.
The period between Advance Notice release and the April Rate Announcement represents a critical preparation window.
Before April, organizations should:
Model potential RAF impact scenarios
Analyze diagnosis-source dependency
Assess documentation variability across networks
Identify high-risk workflows reliant on retrospective correction
After April, leaders should translate finalized policy into operational change:
Update documentation expectations for providers
Align coding and compliance teams with prospective workflows
Implement technology that strengthens encounter-level accuracy
Organizations that treat the Advance Notice as an early warning—not just a policy update—gain a significant strategic advantage.
Q1: Is the CMS Advance Notice final policy?
No. The Advance Notice outlines proposed updates. CMS will release the final Rate Announcement by April 6, 2026.
Q2: Why does the Advance Notice affect RAF accuracy now if changes apply later?
Operational workflows require months to adjust. Documentation practices implemented in 2026 influence payment accuracy in future performance years.
Q3: Does this mean chart reviews are going away?
Not entirely. However, CMS proposals indicate reduced reliance on retrospective sources and increased emphasis on encounter-supported diagnoses.
The CMS Advance Notice is more than an annual policy update—it is a signal of how risk adjustment is evolving.
RAF accuracy in 2026 will increasingly depend on documentation that is complete, specific, and clinically supported at the time of care. Retrospective correction alone can no longer carry organizations through tightening audit expectations and evolving risk models.
The path forward is smarter, earlier intervention.
By strengthening documentation integrity during the encounter and aligning workflows with CMS’s direction toward defensible clinical evidence, plans and provider organizations can improve accuracy while reducing operational burden.
Inferscience helps organizations operationalize this transition through AI-powered tools that support real-time documentation, strengthen RAF defensibility, and prepare teams for the realities of modern Medicare Advantage oversight.
Contact Inferscience to learn how your organization can translate the CMS Advance Notice into a stronger RAF strategy for 2026 and beyond.
Centers for Medicare & Medicaid Services (CMS).
CY 2027 Medicare Advantage and Part D Advance Notice Fact Sheet.
January 2026.
https://www.cms.gov/newsroom/fact-sheets/2027-medicare-advantage-part-d-advance-notice
Centers for Medicare & Medicaid Services (CMS).
Advance Notice of Methodological Changes for Calendar Year (CY) 2027 for Medicare Advantage Capitation Rates and Part C and Part D Payment Policies.
January 2026.
https://www.cms.gov/files/document/2027-advance-notice.pdf
CMS-HCC Risk Adjustment Model Documentation (V28).
Centers for Medicare & Medicaid Services.
https://www.cms.gov/Medicare/Health-Plans/MedicareAdvtgSpecRateStats/Risk-Adjustors
Health Management Associates (HMA).
Outlook 2026: Medicare Advantage Advance Notice and What It Means for the 2027 Market.
2026.
https://www.healthmanagement.com/blog/in-focus/outlook-2026-medicare-advantage-advance-notice-what-it-means-for-the-2027-market/
ATI Advisory.
CMS Releases CY2027 Medicare Advantage and Part D Advance Notice.
2026.
https://atiadvisory.com/resources/cms-releases-cy2027-medicare-advantage-and-part-d-advance-notice/
