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A MedPage Today opinion article says updated ACC/AHA guidelines issued in March 2026 give coronary artery calcium scans a central role for some adults whose need for preventive treatment is uncertain. The authors argue that Medicare and other insurers should pay for the roughly $100 scan, but the supplied report does not establish that Medicare has adopted new coverage or payment rules.
A MedPage Today opinion article published October 25 says updated heart-disease prevention guidelines give coronary artery calcium scans a larger role in deciding whether some adults should start preventive treatment, and argues that Medicare should cover the roughly $100 test. The article does not report a new Medicare coverage decision: whether Medicare will pay for the scans remains unclear from the material provided.
The authors, cardiologists Arthur Agatston and Oren Mechanic, describe a coronary artery calcium (CAC) scan as a roughly 10-minute imaging test that detects calcified plaque in the coronary arteries. They say it costs about $100 and uses a fraction of the radiation of a standard chest CT. In their account, the test can help clinicians assess disease that conventional risk calculators estimate indirectly.
The authors report that in March 2026, the American College of Cardiology and American Heart Association updated national prevention guidelines to recommend CAC scanning for adults at borderline or intermediate risk when it remains uncertain whether to begin preventive therapy, such as statins. A score of zero can support a lower risk estimate, they write, while a score above 100 may identify people who could benefit from medication and intensive lifestyle measures. These are clinical interpretations described in the opinion, not a guarantee of an individual outcome.
To illustrate the test’s role, the authors describe a 52-year-old patient, identified by a changed name, whose standard risk estimate was low but whose CAC score was 220. They say the scan indicated substantial plaque for his age and informed a recommendation for drug treatment. The example is an account from the authors’ practice, not a reported study result. They also argue that patients who cannot pay out of pocket may have less access if insurers do not cover elective scans.
Coverage Could Shape Prevention Access
The article’s central policy point is the potential gap between updated clinical guidance and insurance payment. If patients who could benefit from risk clarification must pay cash, access may depend on ability to afford testing. The authors frame prevention as a way to identify coronary disease before an emergency, contrasting an estimated scan cost of about $100 with a $50,000 heart-attack bill. Those figures are the article’s comparison; the supplied source does not provide a cost-effectiveness analysis or establish that covering scans would avert a particular number of heart attacks or expenses.
For patients and clinicians, CAC imaging may help resolve uncertainty about preventive medication when traditional risk factors do not give a clear answer. But the test is not presented as necessary for everyone, nor does a scan replace a clinical assessment. The guideline indication described by the authors is limited to selected adults whose treatment decision remains uncertain.
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From Risk Estimates to Artery Imaging
For decades, clinicians have used risk calculators based on factors such as age, cholesterol, diabetes, blood pressure and smoking to estimate the likelihood of cardiovascular events. The authors say these tools estimate probability rather than directly showing whether plaque is present. CAC scanning, by contrast, detects calcified plaque, although the opinion does not claim that it captures every form of coronary disease.
The authors say CAC has accumulated evidence over more than three decades but occupied a peripheral place in national guidance until the March 2026 update. They attribute slow adoption partly to clinical decision tools designed around population-level risk factors, cautious guideline processes, and insurer coverage limits. The piece also points to possible use of artificial intelligence to identify coronary calcification on chest CT scans obtained for other reasons. It describes that as a developing opportunity, not as a substitute for established coverage or a settled screening policy.
“The guidelines have finally caught up to the evidence supporting coronary artery calcium scans.”
— Arthur Agatston and Oren Mechanic, in their MedPage Today opinion
Medicare Policy Is Not Specified
The source is an opinion article, not an announcement from Medicare or a coverage determination. It does not say whether Medicare currently covers CAC scans for the patient group described, whether a coverage change is being considered, or what reimbursement amount would apply. It also does not provide a detailed analysis of the evidence, potential harms, or costs of expanding coverage. The effects of AI-assisted interpretation on access and clinical outcomes remain uncertain in the account.
Watch for Coverage Decisions
The immediate next step for readers is to distinguish the guideline recommendation from any decision by Medicare or private insurers about payment. The opinion does not name a scheduled Medicare review, proposed policy, or implementation date. Patients considering a CAC scan can ask their clinician whether the guideline applies to their risk profile and check directly with their insurer about coverage and out-of-pocket costs. Any change in Medicare policy would need to be confirmed through an official coverage notice.
Key Questions
Has Medicare announced that it will pay for CAC scans?
No new Medicare decision is reported in the source. The authors argue for coverage, but the opinion does not establish current policy or announce a change.
Who do the updated guidelines recommend consider a CAC scan?
As described by the authors, the March 2026 ACC/AHA guidance recommends considering the scan for adults at borderline or intermediate risk when the decision about preventive treatment remains uncertain.
What does a CAC score measure?
A CAC scan detects and measures calcified plaque in coronary arteries. The authors say clinicians can use the result alongside other information when assessing prevention options.
Does a zero score mean someone cannot have heart disease?
No. The article says a score of zero can reclassify risk downward; it does not say the result rules out all coronary disease or future risk. Patients should interpret results with a clinician.
How much does the scan cost?
The authors estimate the test costs about $100. Actual prices and insurance coverage may vary, and the source does not provide a Medicare reimbursement rate.
Source: rss
