HCC V28 Explained: The 2026 Medicare Risk Adjustment Changes Every Healthcare Leader Must Know
Comprehensive HCC V28 guide for accurate coding. Improve documentation, prevent claim denials, and maximize reimbursements for your medical practice.
The biggest change to Medicare risk adjustment in years. The new HCC V28 is changing the way practices are calculating RAF scores. A lot of providers are seeing their risk scores drop, but for no apparent reason. This change directly affects Medicare Advantage revenue and sustainability of practices. Healthcare organizations can no longer afford not to know what HCC V28 is.
Changes in coding and weighting for chronic conditions are reflected in the new model. Behaviors that don’t account for these changes will result in lower reimbursements in 2026. The positive aspect is that proactive measures can turn this situation around. This guide illustrates why the RAF scores are decreasing under HCC V28. Most importantly it offers steps to recovery on the revenue side. It is now imperative for healthcare leaders to take action to safeguard their financial health. Let’s discuss the changes and how you can effectively adapt your practice.
What Changed Under HCC V28 and Why It Matters Now
The newest version of the Medicare risk adjustment model is HCC V28. It is a replacement for the previous HCC V24 system from 2026 onwards. This is a model that predicts future healthcare costs based on patient diagnosis. It assigns scores reflecting risk factors, based on documented conditions. The higher a provider’s RAF score, the more he receives in Medicare Advantage payments. The model is dependent on accurate and complete clinical data. Major changes are made to diagnosis coding and weighting in HCC V28. The changes impact on the capture and reporting of chronic conditions in practices. It is essential to comprehend this new model when it comes to revenue cycle management.
Key changes include:
- Expanded HCC categories: Increased number of HCC categories (86 to 115); almost 2,300 ICD-10-CM diagnoses excluded from eligibility for risk adjustment.
- Reduced like-for-like RAF coefficients: Some chronic conditions had lower coefficients as a result of changes in cost data for the 2018 and 2019 FFS cycles.
- Constraining coefficients: The HCCs that are related are all now treated as having the same weight when constraining coefficients.
- Removed interaction terms: The interaction between immune disorders and cancer was eliminated. Others, such as CHF and atrial fibrillation, experienced weight loss.
- Full implementation in 2026: After a three-year phased transition with 33 percent V28 in 2024 and 67 percent in 2025, V28 now operates at 100 percent for payment year 2026.
Why HCC V28 Matters to Healthcare Organizations?
| Area | Before HCC V28 | Under HCC V28 | Industry Benchmark |
|---|---|---|---|
| Diagnosis Mapping | Broader ICD-10 mapping | More selective mapping | Annual mapping review and validation |
| RAF Score Accuracy | More diagnoses contributed to RAF | Fewer qualifying diagnoses increase RAF | Quarterly RAF monitoring |
| Clinical Documentation | General documentation often accepted | Higher documentation specificity required | CDI review before claim submission |
| Risk Adjustment Coding | Legacy coding workflows | Updated coding aligned with V28 | Certified HCC coding audits every quarter |
| Medicare Revenue | More stable reimbursement | Greater risk of revenue loss from missed HCCs | Less than 5% missed HCC capture rate |
| Compliance | Lower scrutiny on some conditions | Increased focus on documentation support | Routine compliance and internal audits |
Why Your RAF Scores Are Falling Faster Than Expected
An individual CMS update is unlikely to cause a drop in RAF scores. In most organizations, the decrease is due to a mix of HCC V28 changes and the fact that there are internal gaps in documentation, coding and risk adjustment workflows. If you want to preserve Medicare Advantage reimbursement and enhance financial outcomes, you must first understand these factors.
Fewer Diagnoses Contribute to RAF Scores
HCC V28 updated the mapping of diagnoses to HCC, eliminating or reworking numerous diagnoses that used to impact risk scores for patients. Thus, the value of diagnoses, which used to contribute to the RAF score, may no longer be significant. Those organizations that still use legacy coding belief systems will see unforeseen reimbursement drops.
Clinical Documentation Lacks the Specificity HCC V28 Requires
To code with accuracy, one must have thorough clinical documentation. Providers are responsible for clearly documenting the severity, status and ongoing management of chronic conditions under HCC V28. Valid HCC assignment may be limited by missing or nonspecific documentation even if the patient has qualifying conditions.
Legacy Coding Workflows Are Slowing Risk Adjustment Performance
A number of healthcare organizations changed their coding references, but not their workflows. With no regular reviews of HCCs, with concurrent documentation improvement, and coder education, it is more likely that important diagnoses will go undocumented, which will lead to less accurate RAF scores.
Chronic Conditions Are Still Being Missed
Recapture for each supported diagnosis is frequently needed annually for patients with multiple chronic conditions. If chronic conditions are not properly documented or coded in the year of measurement, they will not affect the patient’s RAF score and lost revenue will result.
Providers and Coders Are Not Working from the Same Strategy
Collaboration is key to strong risk adjustment. Isolation of providers, clinical documentation staff, and coding staff leads to increased documentation shortfalls. An integrated approach has a positive impact on diagnosis capture, coding accuracy and the overall RAF performance.
Why These Issues Matter
| Operational Gap | Effect on RAF Scores | Financial Impact |
|---|---|---|
| Revised HCC mapping | Fewer qualifying diagnoses contribute to RAF | Lower Medicare Advantage reimbursement |
| Incomplete clinical documentation | Supported conditions cannot be reported accurately | Missed reimbursement opportunities |
| Outdated coding workflows | HCC capture becomes inconsistent | Reduced revenue performance |
| Uncaptured chronic conditions | Lower patient risk scores | Revenue leakage across the patient population |
| Poor provider and coder alignment | Documentation quality declines | Greater compliance risk and payment loss |
These problems tend to develop gradually and may not be noticed until the reimbursement levels start to fall. Lower RAF scores have a direct impact on Medicare Advantage revenue and the long-term financial stability of health care organizations, as detailed in the next section.
Revenue Impact of Lower RAF Scores Under HCC V28
Organizations with lower RAF scores may get less reimbursement (since reimbursement is driven by the “diseasedness” of the Medicare Advantage population) and a lower risk score.
Lower RAF Scores Mean Lower Medicare Advantage Reimbursement
To get back to the RAF, a lot more than corrections for coding errors is needed. Healthcare organizations require a systematic approach to enhance documentation, coding precision, provider involvement, and continuous monitoring and improvement. The following are actions that can lead to better accuracy in risk adjustment while maintaining Medicare Advantage revenue based on HCC V28.
| Performance Indicator | Industry Benchmark | Financial Impact |
|---|---|---|
| Annual RAF recapture rate | 95% to 98% | Lower recapture rates reduce eligible reimbursement. |
| Missed HCC capture | Less than 5% | Higher rates increase revenue leakage. |
| Documentation accuracy | More than 95% | Improves reimbursement accuracy and reduces payment risk. |
Revenue Leakage Builds Across the Entire Patient Population
Small documentation and coding gaps become significant when repeated across a large Medicare Advantage population.
| Revenue Metric | High-Performing Organizations | Organizations at Risk |
|---|---|---|
| HCC capture rate | 95% to 98% | Below 90% |
| Annual coding audit frequency | Quarterly | Once a year or less |
| Missed chronic condition recapture | Less than 5% | More than 10% |
Weaker RAF Performance Reduces Financial Predictability
Consistent RAF performance helps healthcare leaders forecast revenue and allocate resources with greater confidence.
| Financial Planning Metric | Industry Benchmark |
|---|---|
| Revenue forecast variance | Within 3% to 5% |
| Monthly RAF monitoring | 100% of Medicare Advantage population |
| Documentation review completion | More than 95% |
Compliance Gaps Increase Financial Risk
| Compliance Indicator | Industry Benchmark | Risk Level |
|---|---|---|
| Unsupported diagnosis rate | Less than 3% | Low |
| Internal HCC audit accuracy | More than 95% | Strong |
| Provider documentation completion | More than 95% | Strong |
| Coding compliance review | Every quarter | Recommended |
Steps to Recover RAF Score Declines Under HCC V28
Recovering RAF scores requires more than correcting coding errors. Healthcare organizations need a structured strategy that strengthens documentation, coding accuracy, provider engagement, and ongoing performance monitoring. The following actions help improve risk adjustment accuracy while protecting Medicare Advantage revenue under HCC V28.
Strengthen Clinical Documentation at the Point of Care
Complete and specific clinical documentation is essential for accurate RAF scores. Each chronic condition must be clearly documented, assessed and treated by the provider for each reporting year, and the status of the illness must be clearly documented.
| Documentation Metric | Industry Benchmark | Performance Goal |
|---|---|---|
| Documentation completeness | Above 95% | Improve HCC capture accuracy |
| Chronic condition recapture | Above 95% | Support annual RAF recalculation |
| Provider documentation compliance | Above 95% | Reduce unsupported diagnoses |
Improve HCC Coding Accuracy Through Regular Reviews
Regular coding reviews enable missed diagnoses, outdated coding practice and unsupported HCCs to be identified prior to claims submission.
| Coding Metric | Industry Benchmark | Business Outcome |
|---|---|---|
| Coding accuracy | 95% to 98% | Stronger RAF performance |
| Internal coding audits | Quarterly | Earlier error detection |
| Missed HCC rate | Below 5% | Reduced revenue leakage |
Educate Providers on HCC V28 Documentation Requirements
Provider education helps to ensure that clinical documentation is specific enough for HCC V28 and is also adequate for accurate risk adjustment.
| Provider Performance | Industry Benchmark | Expected Result |
|---|---|---|
| Annual HCC education sessions | 2 to 4 | Better documentation quality |
| Documentation query response rate | Above 90% | Faster coding completion |
| Provider participation | Above 90% | Consistent documentation practices |
Monitor RAF Performance Throughout the Year
If an organization performs a continuous review of RAF, they can pinpoint documentation issues before they will impact reimbursement on the annual RAF.
| Monitoring Metric | Industry Benchmark | Financial Benefit |
|---|---|---|
| RAF performance reviews | Monthly | Early issue detection |
| HCC recapture tracking | Monthly | Improved reimbursement accuracy |
| Executive revenue reporting | Monthly | Better financial forecasting |
Use Data Analytics to Identify Missed Revenue Opportunities
With risk adjustment analytics, organizations can focus on high-risk patients, identify the missing HCCs and enhance documentation before the reporting period ends.
| Analytics Metric | Industry Benchmark | Business Value |
|---|---|---|
| High-risk patient reviews | 100% annually | Better HCC capture |
| Predictive RAF analysis | Monthly | Improved revenue planning |
| Coding opportunity reports | Monthly | Reduced missed reimbursement |
Key Takeaway:
Organizations that consistently maintain documentation accuracy above 95%, keep missed HCC capture below 5%, and perform quarterly coding audits are better positioned to protect RAF scores under HCC V28. A proactive strategy not only reduces reimbursement risk but also strengthens long-term financial performance and compliance.
Turning HCC V28 Compliance Into Long-Term Business Growth
Compliant to HCC V28 requirements, and it’s not just good for compliance. It establishes a more solid base for sustainable business development. Those that take proactive steps to ensure consistent HCC capture, document accuracy, and continuous efforts to make financial planning more effective, will be better able to defend Medicare Advantage revenue, optimize financial planning, and make long-term adjustments to their operations. Gradually, compliance becomes a strategic asset, enabling the organization to become profitable and grow.
| Business Growth Driver | Short-Term Benefit | Long-Term Business Impact |
|---|---|---|
| Accurate HCC capture | Higher RAF score accuracy | Sustainable Medicare Advantage revenue |
| Complete clinical documentation | Fewer coding gaps | Stronger audit readiness and compliance |
| Consistent RAF performance | More predictable reimbursement | Better financial forecasting and budgeting |
| Ongoing coding and documentation reviews | Reduced revenue leakage | Improved operational efficiency |
| Compliance-focused workflows | Lower payment risk | Greater capacity for growth and strategic investment |
Case Study: How One Practice Recovered Thousands in Medicare Revenue After HCC V28
After the switch to HCC V28, the multi-provider Medicare Advantage practice had a significant drop in RAF scores with no corresponding change in patient volume. This extensive review identified the problem didn’t stem from patient complexity, but from the lack of documentation, HCC recapture, and coding workflow. The practice enhanced accuracy of the RAF, bolstered reimbursement, and decreased continued revenue leakage after making targeted risk adjustment strategies.
Why the Practice Experienced Lower RAF Scores
- The practice continued using V24 coding patterns after the V28 transition.
- Clinical documentation lacked the specificity required under the new model.
- Vascular disease and other removed conditions were still being coded for RAF.
- Coders were not trained on the new hierarchical condition interactions.
- Providers documented diagnoses without severity or complication details.
- No CDI program existed to review charts before claim submission.
- RAF scores were only reviewed quarterly, allowing declines to accumulate.
- The practice had no real-time monitoring to catch the downward trend early.
- Multiple chronic conditions on each patient were being underweighted collectively.
- The 12 percent audit rate caught several claims with insufficient documentation.
How Billing Care Solutions Helped
- Conducted a comprehensive gap analysis comparing V24 and V28 requirements.
- Updated all EHR coding mappings and workflow configurations for V28 alignment.
- Delivered targeted provider training on V28 specific documentation needs.
- Deployed experienced CDI specialists to review charts before submission.
- Implemented real-time RAF score dashboards for weekly performance tracking.
- Established quarterly certified HCC coding audits with actionable feedback.
- Created a prioritized condition list focusing on highest impact diagnoses first.
- Developed documentation templates with V28 required specificity built in.
- Set up monthly progress reports to track recovery against baseline metrics.
- Provided ongoing support to sustain improvements beyond the initial recovery.
| Metric | Before Billing Care Solutions | After Billing Care Solutions | Improvement |
|---|---|---|---|
| Average RAF Score | 1.08 | 1.27 | +0.19 points |
| RAF Score Change | -17% decline | +5% improvement | 22% turnaround |
| Annual Revenue Per 1000 Patients | 1,080,000 dollars | 1,270,000 dollars | +190,000 dollars |
| Missed HCC Capture Rate | 14% | 4% | 10% reduction |
| Provider Documentation Compliance | 62% | 94% | +32% improvement |
| CDI Review Coverage | 0% | 100% of high-risk charts | Full coverage achieved |
| Coding Accuracy Rate | 78% | 96% | +18% improvement |
Improve RAF Performance with Billing Care Solutions
To recover a RAF score, more than just coding is needed. Requires a cohesive approach that supports clinical documentation, HCC coding, provider education, and revenue cycle management for HCC V28. Billing Care Solutions offers healthcare organizations enhanced value at every point in the risk adjustment journey, from better reimbursement to compliance risk reduction to sustainable financial performance.
| Performance Area | Typical In-House Team | Billing Care Solutions | Industry Benchmark |
|---|---|---|---|
| HCC Coding Accuracy | 85% to 90% | 95% to 98% | Above 95% |
| Missed HCC Capture | 8% to 15% | Below 5% | Less than 5% |
| Clinical Documentation Compliance | 80% to 90% | Above 95% | Above 95% |
| RAF Performance Monitoring | Quarterly or Annual | Monthly | Monthly |
| Coding & CDI Audits | 1 to 2 per year | Quarterly | Quarterly |
| Provider Education | As needed | Ongoing | 2 to 4 sessions annually |
| RADV Audit Readiness | Reactive | Continuous | Continuous monitoring |
| Revenue Leakage | 5% to 10% | Below 3% | Less than 3% |
| Reporting & Analytics | Basic reports | Real-time executive dashboards | Monthly executive reporting |
| Medicare Advantage Revenue Performance | Variable | Optimized through continuous HCC reviews | Stable year-over-year growth |
Conclusion
HCC V28 has revolutionized the way healthcare organizations collect patient risk and obtain Medicare Advantage reimbursement. It is important to note that the lower score on the RAF is not necessarily due to increased complexity of the patient but is more likely to be attributed to inadequate documentation, missed HCC opportunities and outdated coding processes. Compliance risk and revenue protection is more likely to be achieved by organizations that proactively address the issue by enhancing documentation, coding accuracy, and performance monitoring of RAF.
With the proper strategy and the help of experts, HCC V28 doesn’t have to be a burden. It turns into a time for better finance performance, more efficient operation and a more resilient revenue cycle. Working with Billing Care Solutions provides your organization with the knowledge, technology and continuous assistance. To maximize reimbursement for your RAF and to optimize its performance in HCC V28.
