RAF Score in Medicare Advantage (Medicare Risk Adjustment Factor)
If you want the definition of a RAF score, start with what a RAF score is. This page is the Medicare Advantage view: how the Medicare risk adjustment factor sets MA capitation, how raf medicare / raf score medicare advantage revenue scales, and why MA RAF accuracy is the single biggest controllable revenue lever for plans and risk-bearing providers.
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Key data points
- Medicare Advantage now covers more than half of all eligible Medicare beneficiaries — RAF accuracy affects the majority of the Medicare population.
- CMS is fully transitioning to the CMS-HCC V28 risk model: PY2024 = 67% V24 / 33% V28, PY2025 = 33% / 67%, PY2026 = 100% V28.
- An average-risk MA member has a Medicare risk adjustment factor of 1.0; risk-adjusted revenue scales roughly linearly with RAF.
Source: CMS CY2024 Medicare Advantage and Part D Rate Announcement.
What this means for MA revenue: a small RAF change moves capitated payment proportionally. Rather than repeat figures here, see the worked dollar example in what a RAF score is, or run a member profile through the V24 vs V28 tool.
The RAF Score in Medicare Advantage
Medicare Advantage (Part C) plans are paid by CMS on a capitated basis — a fixed amount per member per month, not per claim. To make that fair, CMS adjusts each payment by the member's RAF score in Medicare Advantage: a healthy member generates a smaller payment, while a member with multiple documented chronic conditions generates a larger one. Without risk adjustment, plans would have a financial incentive to avoid sick members; the Medicare Advantage RAF removes that incentive by paying for predicted need.
So "raf medicare advantage", "raf score medicare advantage", and "medicare advantage raf" all describe the same thing: the per-member Risk Adjustment Factor that converts a member's documented clinical complexity into the plan's risk-adjusted revenue for that member.
What Is the Medicare Risk Adjustment Factor?
The Medicare Risk Adjustment Factor — often written as the RAF risk adjustment factor, risk adjustment factor score, or simply risk score Medicare — is produced by the CMS-HCC risk adjustment model. It is the sum of:
Medicare RAF = Demographic coefficients + HCC disease coefficients + Interaction terms → normalized and coding-pattern adjusted
Demographics cover age/sex band, Medicaid/dual eligibility, original-reason-for-entitlement (disability), and community vs. institutional status. Disease burden enters through HCCs mapped from ICD-10 codes. The result is normalized so an average beneficiary is exactly 1.0. The term "risk adjustment factor RAF scores" is simply the plural of this single per-member number tracked across a panel.
How the RAF Score Drives Medicare Advantage Payment
The mechanics are simpler than they look. CMS establishes a county/plan benchmark base rate; the member's RAF score scales it:
| Member | Medicare RAF | Illustrative risk-adjusted payment vs. average |
|---|---|---|
| Healthy 67-year-old, no chronic HCCs | ~0.45 | ~55% below an average member |
| Average-risk member (baseline) | 1.00 | Benchmark base payment |
| Diabetes + CHF + CKD, community | ~1.50 | ~50% above an average member |
| High-acuity, multiple interactions | ~2.50+ | ~150%+ above an average member |
Figures are directional and depend on the model version, payment year, normalization factor, and coding-intensity adjustment. The key point: in Medicare Advantage, RAF score ≈ revenue. A 0.10 RAF swing across a 10,000-member panel is a material, recurring revenue difference, which is why MA plans invest heavily in accurate annual documentation. Model a specific member with the RAF Score Calculator, and compare model versions with the RAF V24 vs V28 tool.
RAF in Medicare vs. Medicare Advantage vs. ACO
People search "raf medicare", "raf score medicare", and "medicare raf score" interchangeably, but where RAF actually pays differs by program:
| Program | Does RAF drive payment? | How |
|---|---|---|
| Original (fee-for-service) Medicare | Not directly to providers | Providers are paid per claim; RAF is not a per-provider payment factor |
| Medicare Advantage (Part C) | Yes — primary lever | RAF scales the capitated per-member payment to the plan |
| ACO / ACO REACH | Yes — benchmark | RAF risk-adjusts the population benchmark the ACO is measured against |
The CMS-HCC risk adjustment methodology (raf risk adjustment / risk adjustment raf) is shared across these programs — only how the resulting RAF score connects to dollars changes. For the program-agnostic definition, see what a RAF score is; for value-based context, see value-based care.
Why Medicare Advantage RAF Accuracy Matters
Because RAF resets every calendar year, every chronic condition must be re-documented and re-coded annually to keep contributing. Under-capture understates member acuity and underpays the plan for genuinely complex populations; over-capture without record support is a RADV-audit and compliance risk. The objective is accuracy, not maximization — a Medicare RAF that fully and defensibly reflects each member's documented conditions. Strong HCC and RAF coding programs and population health management are how MA organizations get there. For a quick reference of the factors involved, use the RAF score cheat sheet.
Calculate a Medicare Advantage RAF score
Enter ICD-10 codes and member demographics — get an instant, model-accurate RAF score for V24 or V28.
Open the RAF Score CalculatorFrequently Asked Questions
It is the per-member Risk Adjustment Factor CMS applies to a plan's base payment. A higher, accurately documented RAF means CMS pays the plan more because the member is predicted to cost more.
RAF stands for Risk Adjustment Factor — the standardized score CMS uses to risk-adjust Medicare Advantage capitation so plans caring for sicker members are paid proportionally more.
It is the sum of demographic coefficients plus HCC disease coefficients (mapped from ICD-10 codes) plus interaction terms, normalized so 1.0 equals an average beneficiary. See how a RAF score is calculated.
CMS multiplies the benchmark base rate by the member's RAF. Roughly, a member at RAF 1.5 generates about 50% more risk-adjusted revenue than an average (1.0) member, subject to normalization and coding-intensity factors.
The CMS-HCC methodology is the same, but RAF directly drives payment in Medicare Advantage (and ACO/REACH benchmarks). Fee-for-service Original Medicare pays per claim and does not use RAF to pay providers directly.
This page is educational and does not constitute coding, billing, legal, or clinical advice. RAF coefficients, normalization factors, and CMS-HCC model rules change by payment year; always confirm against the current CMS Rate Announcement and your organization's compliance guidance. CPT® is a registered trademark of the American Medical Association; HEDIS® is a registered trademark of the National Committee for Quality Assurance (NCQA). This page is independent and is not affiliated with, endorsed by, or sponsored by CMS, the AMA, or NCQA.