A coronary artery calcium (CAC) score test typically costs between $50 and $400 out of pocket, depending on where you get it done. Most people pay for this test themselves because nearly all insurance plans, including Medicare, do not cover it for routine heart disease risk screening. The good news is that many hospitals and imaging centers have deliberately lowered their prices, with some charging as little as $50 to $100.
Why Most People Pay Out of Pocket
Despite strong evidence supporting its use, calcium scoring for primary prevention remains a non-covered service under most insurance plans. Medicare and the majority of private insurers classify it as elective screening rather than a diagnostic test, which means no reimbursement. The American Heart Association has publicly called on insurance payers to cover the test for people at intermediate risk, but coverage policies haven’t caught up.
Because the test is so widely self-paid, many facilities price it competitively. You’ll often find it listed as a flat-rate “heart scan” package at imaging centers, sometimes advertised directly to consumers. Prices tend to cluster around $75 to $200 at standalone imaging centers, while hospital-based facilities can charge $200 to $400 due to higher facility fees. Calling ahead and comparing prices in your area is worth the five minutes it takes.
What the Test Involves
The scan itself is a low-dose CT of your chest that takes only a few seconds of actual imaging time. You’ll have electrodes placed on your chest so the scanner can sync its images with your heartbeat, capturing clear snapshots of your coronary arteries between beats. The whole visit, including check-in and setup, runs about 10 to 15 minutes.
Preparation is minimal. You’ll need to skip food, drinks, caffeine, and tobacco for four hours beforehand. A high heart rate can blur the images, so the caffeine restriction matters. No IV contrast dye is needed, and there’s no recovery time. You can drive yourself home and go about your day immediately.
What Your Score Means
The scan produces a number called an Agatston score, which reflects how much calcium has built up in the walls of your coronary arteries. Calcium deposits form inside arterial plaque, so the score serves as a direct measurement of how much plaque is present. The categories break down like this:
- 0: No detectable calcium. Your risk of a heart event over the next decade is very low, generally around 1.5% to 4.5% even if other risk calculators put you in a higher bracket.
- 1 to 99: Mild plaque buildup. This moves you above the threshold where preventive treatment like a statin is considered beneficial.
- 100 to 299: Moderate plaque. At this level, statin therapy is favored, and low-dose aspirin may be appropriate if you’re not at high risk for bleeding.
- 300 and above: Significant plaque burden. Event rates at this level approach those of people who already have established heart disease, and high-intensity statin therapy is typically recommended.
The real power of the test is in the extremes. A score of zero is remarkably reassuring. In large population studies, people with a zero score had actual heart event rates well below the thresholds that justify starting medication, even when their other risk factors suggested they should be on treatment. On the other end, a score above 100 consistently predicted event rates high enough that preventive medication showed clear benefit, regardless of what standard risk calculators estimated.
Who Benefits Most From Getting One
The 2019 guidelines from the American College of Cardiology and American Heart Association recommend considering a calcium score for adults whose 10-year risk of heart disease falls in the intermediate range (7.5% to 20%) or the borderline range (5% to 7.5%). For these groups, the test acts as a tiebreaker when the decision to start a statin isn’t clear-cut.
Some specific situations where the test adds the most value: you’re on the fence about starting a statin and want a clearer picture of your actual risk; you stopped taking a statin due to side effects and want to know whether restarting is worth it; you’re a middle-aged adult (40 to 55) with borderline risk and factors like family history pushing you toward concern; or you’re an older adult (men 55 to 80, women 60 to 80) with few risk factors who questions whether a statin would help. In all these cases, a zero score can offer genuine peace of mind, while a positive score can motivate action.
The test is not intended as a blanket screening tool for everyone. If you’re already at high risk or already on treatment for heart disease, the result won’t change your management. And if you’re young with no risk factors, there’s little calcium to find.
How Often to Repeat the Test
If your initial score is zero, you generally don’t need another scan for 5 to 10 years. Guidelines from the National Lipid Association suggest a repeat in 5 to 7 years if you have a family history of early heart disease, or 3 to 5 years if you fall in the intermediate risk category. Calcium deposits don’t appear overnight, so frequent retesting adds cost without useful new information.
If your score is above zero, the result has already done its job. The focus shifts to treatment decisions rather than repeat scanning.
How It Compares to Other Heart Tests
A calcium score test and a stress test answer different questions. The calcium score tells you how much plaque exists in your arteries. A stress test tells you whether blood flow to your heart is currently restricted during exertion. You can have significant plaque buildup that hasn’t yet narrowed an artery enough to cause symptoms or show up on a stress test, which is exactly the scenario where early prevention matters most.
CT angiography (CTA) is a more detailed scan that uses contrast dye to visualize the arteries themselves, not just the calcium within them. It’s significantly more accurate than stress testing for diagnosing blockages, with sensitivity around 98% compared to roughly 67% for a standard exercise stress test. CTA also tends to result in lower overall healthcare costs because it reduces the need for follow-up procedures. But CTA costs considerably more than a calcium score, involves contrast dye, and is typically ordered when there’s already a clinical suspicion of coronary artery disease rather than for pure risk screening.
For someone without symptoms who simply wants to understand their risk, the calcium score hits a sweet spot: it’s fast, inexpensive, requires no dye or needles, and provides a single number that meaningfully changes clinical decisions.