Understanding HCC V28 Comprehensive Guide for Accurate Medical Coding

Understanding the new CMS Hierarchical Condition Category model is no longer optional for medical coders, physicians, and healthcare administrators; it's a requirement for financial viability as well as regulatory compliance. This guide from Billing Care Solutions will educate the HCC V28 models, the last one that currently controls payment determination.

What is HCC V28 and Why It Matters for Your Practice

HCC V28 is fundamentally the newest release of the CMS Hierarchical Condition Category model, properly referred to as the CMS HHS Risk Adjustment Model. This model has become the exclusive standard for calculating risk scores for Medicare Advantage beneficiaries after years of phasing in updates. For payors, this fundamental redesign of how you assess patient complexity and expected costs is more than a small iteration from the previous V24 model to HCC V28.

HCC V28 is designed to more accurately match payments with the underlying health condition of patients. CMS concluded that the old model assigned exaggerated value to certain diagnoses while being too non-specific according to current ICD-10 coding. As a result, the revised model is structured to be dependent exclusively on ICD-10 classifications. This transition has ultimately led to a recalibration of RAF scores for many practices. Having insight on how HCC V28 works is the first step to protecting your practice’s revenue and ensuring you aren’t leaving money on the table due to outdated coding habits.

Key Structural Changes in the CMS-HCC V28 Model

Getting familiar with your HCC V28 architecture is a prerequisite to passing it successfully. The model includes some important structural changes that influence the coding workflow directly.

ICD-10 based model: The biggest technical difference with this updated predictive model is the fact that this new model is fully rooted in ICD-10 codes. In HCC V28, the previous ICD-9 crosswalk is removed, linking each diagnosis directly to its relevant ICD-10 code. This enhances precision but requires coders to ensure that documentation is at the highest level of specificity.

Payment HCC Count: The number of total ICD-10 codes mapped to the model has decreased by approximately 2000, yet the number of payment HCCs increased (from 86 to 115). This expansiveness has allowed for more specific differentiation of certain diseases, especially in areas like mental illness and substance abuse.

Reduced Code Set: Conditions that used to generate a risk score in the past do not anymore under HCC V28 (eg, unspecified angina or various types of atherosclerosis). These codeset restrictions compel providers to document specific, grievous and well-supportable diagnoses in order to capture the required risk.

High Impact Clinical Categories: What Has Changed?

By knowing which clinical areas are affected by HCC V28, coding teams can focus their education and documentation improvement efforts.

Cardiovascular and Endocrine Updates

In cardiovascular care, HCC V28 has made major changes. When it comes to coding Congestive Heart Failure, recent guidelines have greatly improved specificity when making distinctions between acute, chronic and unspecified elements. Diabetes coding, too, has been limited. One important change with HCC V28 is that the presence of multiple manifestations of diabetes might not contribute additively as they did before.

Conditions Removed from Payment

The most important thing for coders to review may be the list of conditions that were removed from the payment model. HCC V28 removes payment for diagnoses that are, at best, vague or not expensive to treat. Key removals include:

• Protein Calorie Malnutrition
• Unspecified Angina
• Various forms of Atherosclerosis

Sending these codes as if they bring value is pointless. You have to start shifting your focus exclusively onto the conditions that the new model sounds like large cost drivers.

Newly Emphasized Conditions

In contrast, HCC V28 focuses more on chronic conditions with high cost of long term management. This includes:

• CKD staging, where stage is used to assign a risk score.
• Severe mental health disorders, including Schizophrenia and Bipolar I disorder
• Transplant statuses and major organ transplants, as these patients require ongoing care throughout life.

Navigating Disease Interaction Terms in V28

With that in mind, something we found to be one of the relatively complicated but nonetheless most critical components of HCC V28 is how disease interaction terms get handled. These terms reflect the understanding that patients with certain combinations of chronic conditions tend to need more complex care than adding up their individual diseases would suggest.

The Value of Multimorbidity:

The interaction terms are used to take the effect of condition combinations such as diabetes and congestive heart failure. These interaction terms will remain under HCC V28, i.e. it is possible that a hierarchy trumping effect on a condition will be present, but still the interaction term may be value adding. 

This is to make sure that the patients with multimorbidity are represented correctly. Coders should however note that these interactions have been recalibrated. To illustrate, the Congestive Heart Failure and Atrial Fibrillation weight have been modified in HCC V28. These subtleties are also important to effectively calculate the RAF score.

Best Practices of Accurate Coding Under HCC V28

The successful transition to HCC V28 needs a proactive approach that will overcome the clash between clinical documentation and coding compliance.

Focus on Specificity in Documentation:

• The HCC V28 golden rule is specificity. Key action items include:
• To be sure that a diagnosis of unstable angina and not angina only will be included in the model.
• Recording which stage each CKD patient is at.

Leverage Data and Technology:

It is not enough to do manual coding reviews only. Technology can be a support by pointing out those Mercedes where a high-value condition was mentioned in a note but not coded, and by flagging patients who, based on their history, presumably have a condition that requires annual recapture. Using data to make sure that every documented, billable diagnosis is captured accurately, practices will be rewarded by HCC V28.

Common Pitfalls to Avoid During the V28 Transition

Knowing about the most frequent errors will help your organization avoid both compliance risk and financial loss.

Relying on V24 Logic:

The biggest mistake that a coder can fall into is to believe that the old rules are still valid. HCC V28 has new logic, hierarchies, and payment HCCs. Coding out of habit relying on V24 mappings will lead to errors. Each diagnosis should be checked with the latest HCC V28 to see if it is still a valid payment driver.

Incomplete Problem Lists:

Another very common issue is what is called a "carry-over" condition list. Just because a condition was documented two years ago does not mean it should be considered valid today. The dangers of this are:

• Partial Risk Profiles: HCC V28 expects that diagnoses must be backed up by up-to-date clinical evidence. If you do not make an effort to update problem lists, you end up with an inaccurate patient risk profile.
• Higher Audit Risk: Without current supporting evidence, the risk of an audit is increased. CMS changed HCC V28 partly to fight coding intensity, so they are carefully checking diagnoses to make sure they are supported by the medical record.

How Billing Care Solutions Supports Your V28 Journey

The world of HCC V28 is complex and daunting, and it's easy to feel overwhelmed. However, one thing that you can be sure of is that you won't have to figure it out by yourself. Billing Care Solutions is a healthcare consulting firm that understands the intricacies of changing the regulatory environment and is ready to assist you.

• RAF Reconciliation: Using your past RAF scores, we can help you bring them in line with the new V28 weights.
• Audits: Getting audit done will reveal if any of your old V24 coding behaviors are still affecting your income under the new system.
• Education: We give coding staff and providers specific lessons so that everyone will know how to tell HCC V28 apart, even through disease hierarchies and documentation requirements.

You can sleep well knowing that your coding practices are compliant and accurate if you decide to work with Billing Care Solutions. Accurate and well-timed coding could make the difference in your practice's revenue performance. We focus on delivering higher performance and superior quality by mastering the details of HCC V28 together with you.

Conclusion:

Switching to HCC V28 is probably the biggest change in Medicare Advantage risk adjustment since the shift from ICD-9 to ICD-10.

This is a very different payment system compared to the old one. It is more precise because it uses the exactness of ICD-10 and it also leaves out low value diagnoses. So as a result, CMS is asking us to work on documentation and coding accuracy more than ever. And for the medical practices to be successful, it is going to require a very proactive solution: going in for specificity, making use of data analytics, and forgetting about the V24 times. 

Of course, it is going to be a bit of a struggle at first, but it is totally worth it because HCC V28 will help us manage the revenue cycle in a compliant way and it will also give us a correct representation of the patient's acuity. Billing Care Solutions is here to help you during this change so that your coding will always be accurate, profitable and completely consistent with the newest regulatory standards. 

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