RADV Audits Don't Have to Tank Your Revenue—Here's How to Prove It

CMS just expanded its Medicare Advantage audit program from roughly 60 contracts per year to all 550 eligible contracts annually — and simultaneously grew its medical coder workforce from 40 reviewers to approximately 2,000, according to an official CMS press release. That is not a scaling adjustment. That is a signal.

RADV audit readiness is no longer a contingency plan. For internal medicine practices with Medicare Advantage contracts, it is an immediate operational requirement — one that arrived at the same time the V28 HCC model gutted more than 2,000 previously valid ICD-10 codes from risk-scoring eligibility.

Federal estimates cited by AHCA/NCAL put MA overbilling at $17 billion annually in unsupported diagnosis codes. CMS is not auditing to find a few bad actors — it is auditing because it expects to find problems everywhere. Your documentation either survives that scrutiny or it does not.

What You Need to Know About RADV Audit Readiness for Internal Medicine

RAF scores reset every January 1st with zero carry-forward. According to RAAPID Inc., chronic conditions undocumented in the current year drop from RAF calculations entirely — creating revenue leakage averaging $3,000 per member annually. For a panel of 500 Medicare Advantage patients, that is $1.5 million quietly walking out the door.

V28 made that problem significantly worse. The CMS-HCC V28 model, fully effective January 1, 2026, eliminated more than 2,000 ICD-10 codes from risk-scoring eligibility — reducing valid HCC-mapped codes from 9,797 to 7,770. Codes your practice used accurately under V24 may now carry no weight at all.

The audit exposure compounds that revenue bleed. OIG findings cited by RAAPID Inc. show over 80% of high-risk MA diagnosis codes were unsupported by medical records across multiple organizations audited in 2026.

Internal medicine practices face a two-way trap:

• Undercoding: V28-remapped conditions — diabetes with complications, CKD, CHF, COPD — are silently losing RAF weight without updated documentation specificity
• Overcoding: Diagnoses carried forward from prior years without current-year MEAT criteria become live audit liability

ForeSee ESP addresses both. Its NLP engine surfaces clinically-supported chronic conditions from unstructured EHR data. Its Delete Suspects report flags codes that cannot survive scrutiny before a RADV auditor finds them first.

Key Strategies and Best Practices

Passive recapture is not an audit strategy. It is a liability waiting to be discovered.

According to MBW Revenue Cycle Management, a Medicare Advantage organization with over 25,000 members improved RAF accuracy by 18% within 12 months — after discovering that 22% of reviewed charts contained undocumented or underreported chronic conditions including diabetes with complications, CKD, COPD, and CHF. That is not a documentation problem. That is a revenue and compliance problem hiding in plain sight.

The core issue: most internal medicine practices are only reviewing what they already coded. ForeSee Medical reports that 70–80% of clinically relevant patient data — encounter notes, discharge summaries, specialist consults — is buried in unstructured PDF text, completely invisible to basic recapture tools.

Three practices that separate defensible documentation from audit exposure:

• Surface conditions NLP finds, not just what coders remember. AI scanning across unstructured EHR data catches clinically documented chronic conditions that manual review misses entirely.
• Validate every HCC against MEAT criteria before submission. Coding compliance expert Wynda Clayton put it plainly: "Before you validate any condition, ask yourself: if I had to go before a court of law, could I defend this?"
• Run a Delete Suspects review every cycle. Flagging and removing unsupported diagnoses proactively is now as important as adding new ones — CMS is looking for both directions of error.

According to KFF, more than 55% of Medicare beneficiaries — 35.2 million people — are now enrolled in Medicare Advantage plans. For most internal medicine practices, RAF accuracy is not a back-office concern. It is the primary revenue driver for the majority of their Medicare panel.

Common Mistakes to Avoid

Most internal medicine practices are not failing RADV audits because they coded aggressively. They are failing because they never built a defensible documentation trail — and they have no system to catch the problem before CMS does.

Three patterns show up repeatedly in practices that face recoupment exposure:

• Coding only in one direction. Legacy tools surface additional HCC opportunities but never flag which existing codes lack current-year MEAT evidence. Every unsupported diagnosis carried forward without active clinical documentation is a liability that compounds annually. ForeSee ESP's Delete Suspects report exists precisely for this — it proactively identifies diagnoses previously captured that no longer have current clinical backing, so your team removes them before an auditor does.
• No click-to-source audit trail. According to the OIG, 252 of 300 sampled enrollee-years in one Medicare Advantage contract audit lacked sufficient documentation to support submitted diagnosis codes. If your coders cannot instantly produce the source chart entry behind any flagged diagnosis, you are not audit-ready. ForeSee ESP's InstaVu® closes that gap — one click, original document, audit-defensible.
• Treating RADV as a periodic event. CMS is now auditing all ~550 eligible MA contracts annually. One-time chart chases are not a compliance strategy anymore.

Practical Next Steps

The court battle in Humana v. Becerra temporarily slowed CMS's extrapolation power — but HOM Revenue Cycle Management notes CMS appealed in November 2025 and continues auditing all ~550 MA contracts. Waiting for legal clarity is not a strategy. The documentation work has to happen now.

According to ICD10Monitor, the OIG audited 300 sampled enrollee-years for one MA contract and found 252 of 300 lacked sufficient documentation — resulting in an estimated $4.4 million in net overpayments when extrapolated. That is not an outlier. That is the baseline.

Here is where to start:

• Audit your Delete Suspects exposure first. Identify every chronic condition in your MA panel that lacks current-year MEAT documentation. These are your highest-liability codes.
• Run a V28 gap analysis. Any ICD-10 code your practice used under V24 that no longer maps under V28 is either silent revenue leakage or active audit risk — both need resolution before your next plan submission.
• Shift from recapture-only to disease discovery. ForeSee ESP clients using disease discovery during annual wellness visits uncovered four times more new conditions than recapture alone.
• Verify your documentation trail is click-ready. If a CMS reviewer requests chart support for a submitted diagnosis, your team needs to retrieve the source note in seconds — not hours.

Coding compliance expert Wynda Clayton puts it plainly: "Before you validate any condition, ask yourself: if I had to go before a court of law, could I defend this?" (RAAPID Inc.) That standard now applies to every diagnosis on every MA chart, every year.

RADV audit readiness is no longer a future planning item — it is a current operating requirement. According to ICD10Monitor, when the OIG audited 300 sampled enrollee-years for one Medicare Advantage contract, 252 of 300 lacked sufficient documentation to support submitted diagnosis codes — generating an estimated $4.4 million in extrapolated overpayments. That is not an outlier. That is the baseline CMS expects to find.

Navina confirms that as of payment year 2026, all risk scores run 100% under V28. Any practice still relying on V24-era documentation specificity is carrying both revenue gaps and audit liability simultaneously.

Internal medicine sits at the center of this pressure. According to Medical Billers and Coders, the national CCM billing capture rate for internal medicine is below 35% of eligible patient-months — in the specialty with the highest chronic disease burden in the Medicare Advantage population. The revenue is there. The documentation is not.

ForeSee ESP addresses both failure modes directly: NLP that surfaces underdocumented chronic conditions from unstructured EHR data, InstaVu click-to-source audit trails, and a Delete Suspects report that eliminates unsupported diagnoses before they become a RADV finding.

The audit is coming. The question is whether your documentation is ready for it. Connect with Perfect Rhythm to prepare your practice for RADV audit readiness and see how our solutions help you stay compliant with CMS standards.

Frequently Asked Questions

What is RADV audit readiness for internal medicine practices?

RADV (Risk Adjustment Data Validation) audit readiness means having current-year clinical documentation that supports every HCC diagnosis code submitted for Medicare Advantage risk adjustment. For internal medicine, this requires MEAT-criteria evidence for each chronic condition — managed, evaluated, assessed, or treated — tied directly to a specific chart entry.

How does the V28 HCC model affect internal medicine reimbursement?

The CMS-HCC V28 model, fully effective January 1, 2026, eliminated more than 2,000 ICD-10 codes from risk-scoring eligibility compared to V24. Practices managing high volumes of diabetes, CKD, CHF, and COPD patients face lower RAF scores if documentation hasn't been updated to meet V28 specificity requirements — directly reducing Medicare Advantage revenue.

What does ForeSee ESP do that standard EHR coding tools do not?

ForeSee ESP uses NLP to scan unstructured EHR data — including PDFs and discharge summaries — to surface clinically documented chronic conditions that standard recapture tools miss. Its InstaVu feature links each diagnosis to its source chart entry, and its Delete Suspects report flags codes that lack current-year clinical support before a RADV auditor finds them first.

How often are Medicare Advantage practices now subject to RADV audits?

As of May 2025, CMS announced it will audit all approximately 550 eligible Medicare Advantage contracts annually, up from roughly 60 per year previously. This makes RADV readiness a permanent annual operating requirement, not a periodic compliance event.

What is the financial risk of failing a RADV audit?

Exposure varies by contract size and documentation gaps, but the stakes are significant. In early 2026, five Kaiser Permanente affiliates settled for $556 million and Aetna settled for $117.7 million over unsupported MA diagnosis codes. At the practice level, a single OIG audit found $4.4 million in extrapolated overpayments from one contract's sampled records alone.