Contributor: Medication Adherence—A Lens into How Well Health Care is Working

If you want to understand how well health care is working for a member, don’t start with medical claims data, quality scores, or utilization reports. Start with 1 deceptively simple question: Are they taking their medication as prescribed?

That question reveals more than it may seem.

Medication adherence sits at a critical intersection in health care, involving many key stakeholders. Prescribing decisions begin with clinicians. Pharmacies shape access. Health plans design and administer benefits. And members control the culmination of the experience with their daily behaviors. Successful medication consumption depends on a long chain of interactions, systems, and personal choices all working together. For health plans, adherence represents one of the clearest indicators of how well the health care system is functioning—and one of the most actionable opportunities to improve outcomes at scale.

Why Adherence Matters So Much

Medication adherence has an outsized impact on both individual health and the economics of health care.

When medications are taken appropriately and consistently, they can slow disease progression, prevent avoidable complications, and improve quality of life. For health plans, that often means fewer costly escalations in care, lower avoidable utilization, and better long-term population health.

Adherence has growing importance in policy discussions. CMS continues shifting emphasis toward outcomes-focused measures, reinforcing the value of interventions that improve real member health rather than administrative process alone. The Medicare Advantage Star Ratings program also continues to recognize the importance of adherence and medication safety through measures tied to chronic disease management and appropriate medication use.

However, adherence matters beyond any single measure.

It is a foundation of chronic disease stability, health care utilization, and member experience. Sustained adherence efforts often create a ripple effect across performance areas, acting as a kind of “hidden multiplier.” Plans that improve adherence are not only strengthening performance in the 3 Part D adherence measures, but also they may support broader gains tied to outcomes, satisfaction, and long-term stability.

In short, a health plan’s ability to improve medication adherence can play a meaningful role in both member health and the financial sustainability of the plan itself.

Adherence Reveals Where the System Breaks Down

Medication adherence is especially valuable because it reflects whether the many moving parts of health care are working together as they should.

Breakdowns in adherence often signal breakdowns in communication, coordination, or access.

Consider the journey of a member newly diagnosed with a chronic condition. They visit their primary care provider, receive a diagnosis, and are prescribed a medication. The provider may or may not have a complete picture of care the member is receiving elsewhere. The member then needs transportation to the pharmacy, must understand how to take the medication, feel confident about side effects, and remember to refill it on time. If a refill is missed, the health plan may see a gap in claims but not the reason behind it.

The combination of variables is what makes adherence so revealing. It does not simply show whether a member remembered a daily dose. It shows whether the health care experience surrounding that member is connected, clear, and supportive.

When adherence rises, it often means systems are aligning. When adherence falls, it can expose where support is breaking down.

Once Problems Are Visible, Plans Can Act

The value of adherence is not only that it reveals problems, but it also helps point toward solutions.

Clinicians may lack visibility into the full care picture. Plans may see pharmacy claims gaps without understanding the clinical or behavioral reasons behind them. When those blind spots persist, opportunities for early intervention are often missed. But when the full picture becomes clearer, plans can respond more effectively by adjusting outreach, resolving barriers, improving education, or coordinating with providers before issues escalate.

Many adherence gaps are not caused by a lack of intent. They are driven by underlying barriers that remain unseen unless plans actively look for them. A member may skip refills because transportation is unreliable, out-of-pocket costs are too high, or caregiving responsibilities have become too much. Others may hesitate because they fear side effects or feel overwhelmed by complex instructions. Though these social and behavioral barriers won’t appear in claims data, they are often the true reason adherence breaks down. When plans address the cause—not just the symptom—they are far more likely to improve outcomes and sustain adherence over time.

Driving sustainable member change with stakeholder support requires more than raw data.

Plans need to connect information from multiple sources and interpret it through clinical and behavioral context. They need to understand not only what happened but also why. And they need to turn that insight into action in ways that reduce friction for both providers and members.

The growing need for comprehensive understanding and effective action is why many organizations work with specialized partners focused on adherence analytics and intervention. With the right strategy, adherence becomes more than a scorecard metric. It becomes a diagnostic tool for improving the health care experience itself.

The Strategic Constant in a Changing Industry

Health care will continue to evolve. Measures will change. Regulations will shift. Financial pressures will rise and fall.

But one truth remains constant: health plans succeed when members are stable, supported, and able to manage chronic conditions over time.

Medication adherence is one of the few levers that consistently advances all 3. It improves outcomes, helps reduce avoidable costs, and strengthens the member experience. Just as importantly, it offers an ongoing real-world signal of whether health care is truly working for the people it is meant to serve.

That is why adherence deserves continued focus—not simply because it is measured, but because it reveals, guides, and improves what matters most.