A calcium score test is a CT scan of your heart that measures calcium buildup in your coronary arteries. You get one through a doctor’s referral or a self-pay imaging center, and it typically costs between $100 and $400 out of pocket. The scan itself takes about 10 to 15 minutes, is painless, and requires no needles or special preparation beyond avoiding caffeine for a few hours beforehand.
What Is a Calcium Score Test?
A coronary artery calcium (CAC) scan is a specialized CT scan that looks for calcium deposits in the walls of your heart’s arteries. These deposits are a direct sign of atherosclerosis — the plaque buildup that can lead to heart attacks.
The test produces a number called your Agatston score. A score of zero means no detectable calcium. Higher scores indicate more plaque. This number helps your doctor estimate your future risk of heart attack or stroke more precisely than standard risk factors alone.
Unlike a stress test, this scan does not measure blood flow or heart function. It only measures calcium. That distinction matters because the test answers a different question: how much plaque is actually present, not how well your heart is pumping.
How Much Does a Calcium Score Test Cost?
The price varies significantly depending on where you live and where you get the scan. Most self-pay prices fall between $100 and $400. Some imaging centers advertise prices as low as $49 during promotional periods, while hospital-based scans in major cities can exceed $500.
Your insurance situation matters. Medicare covers calcium scoring in specific circumstances, but many private insurers consider it a screening test and do not cover it. Some insurers will cover it if your doctor documents a clinical reason — such as an intermediate risk score based on standard calculators.
Before booking, call the imaging center and ask for the cash price. Many centers offer significant discounts for self-pay patients. Ask whether the quoted price includes the radiologist’s reading fee. Some centers quote only the technical fee, and the final bill arrives higher.
Health savings accounts (HSAs) and flexible spending accounts (FSAs) typically cover the cost of this test. If you have one of these accounts, you can use pre-tax dollars to pay for the scan.
How Do You Get a Calcium Score Test?
You have two main paths to getting this test. The first is through your doctor. Your primary care physician or cardiologist can order the scan. This path is more likely to result in insurance coverage, especially if you have risk factors like high cholesterol, high blood pressure, diabetes, or a family history of early heart disease.
The second path is direct self-referral. Many imaging centers now offer calcium scoring without a doctor’s order. You call, schedule, pay, and show up. This is often cheaper and faster, but you should understand the trade-off: no one interprets the result for you unless you bring it to a doctor afterward.
Either way, you will need to provide basic information about your medical history. The center will ask about your age, weight, and risk factors. This information helps them determine whether the scan is appropriate for you.
Who Should Get a Calcium Score Test?
Current guidelines do not recommend calcium scoring for everyone. The test is most useful for people aged 40 to 75 who are at intermediate risk for heart disease — meaning their 10-year risk of a heart attack falls somewhere in the middle range based on standard calculators.
If you are at low risk with no symptoms and no major risk factors, the test may not change your treatment plan. If you are already at high risk and taking aggressive preventive therapy, the result also may not change what you do. The test adds the most value for people in the gray zone — those whose risk is unclear based on traditional factors alone.
People with known coronary artery disease, prior heart attacks, or prior stent placements generally do not need this test. The diagnosis is already established, and the calcium score adds little useful information.
Some professional guidelines suggest calcium scoring can help reclassify risk in people with borderline decisions about starting statin therapy. A high score can tip the decision toward medication. A zero score can support a decision to hold off.
What to Expect During the Scan
The scan is straightforward. You will lie on a table that slides into a CT scanner — a large donut-shaped machine. The technologist will place small sticky electrode patches on your chest to monitor your heart rate during the scan.
You may be asked to hold your breath for 10 to 15 seconds while the scanner captures images. This helps reduce motion blur from your breathing. The entire scan takes less than 15 minutes from start to finish.
No contrast dye is used. This is important because contrast dye requires an IV and carries risks for people with kidney problems. The calcium scan is completely non-invasive.
You should avoid caffeine for at least four hours before the scan. Caffeine can raise your heart rate, which may affect image quality. Some centers also ask you to avoid smoking or using nicotine products before the test.
Wear comfortable clothing without metal. You will likely change into a hospital gown anyway, but avoiding metal zippers and buttons simplifies the process.
Understanding Your Calcium Score Results
Your result is a single number. The Agatston score ranges from zero upward, and higher numbers mean more calcium in your arteries.
A score of zero means no detectable coronary calcium. This is associated with a very low risk of heart attack over the next decade, though it does not mean zero risk. Plaque can exist without calcification, especially in younger people.
Scores of 1 to 99 indicate mild plaque. Scores of 100 to 399 indicate moderate plaque. Scores of 400 or higher indicate extensive plaque and carry a significantly elevated risk of future heart events.
Your doctor will interpret your score in context. Age and sex matter — a score of 200 in a 45-year-old carries different implications than the same score in a 75-year-old. Some reports include a percentile ranking that compares your score to others in your age and sex group.
Ask your doctor what your score means for your specific situation. A single number is not a diagnosis. It is a risk marker that informs decisions about statins, aspirin, and lifestyle changes.
Are There Downsides or Risks?
The scan exposes you to a small amount of radiation. The typical effective dose is around 1 to 3 millisieverts — roughly the amount you would receive from natural background radiation in a year. This is considered low, but it is not zero.
There is no reason to repeat the scan frequently. Most experts suggest that a repeat scan every five years may be reasonable in some cases, but annual scans are rarely justified. The radiation exposure and cost rarely change management that quickly.
False reassurance is a real concern with a zero score. A zero score is good news, but it does not mean you can ignore your diet, exercise, or other risk factors. Some people with zero scores still have heart attacks.
An incidental finding is another possibility. The scan may pick up lung nodules, thyroid abnormalities, or other findings unrelated to your heart. These findings sometimes lead to additional testing that carries its own risks and costs.
How to Find Affordable Options Near You
Start by asking your doctor’s office for recommendations. They often know which local imaging centers offer reasonable self-pay rates. Hospitals are typically the most expensive option.
Search online for independent imaging centers in your area that advertise calcium scoring. Many list their cash prices directly on their websites. Compare a few options before booking.
Ask about package deals. Some centers offer calcium scoring combined with other preventive screenings — like carotid ultrasound or abdominal aortic aneurysm screening — at a bundled price. Only get the tests that make sense for your situation.
Check whether your insurance plan has a negotiated rate for this test. Even if your plan does not cover the scan, the negotiated rate may be lower than the self-pay price. Call your insurer and ask for the allowed amount for CPT code 75571 — the billing code for cardiac calcium scoring.
Frequently Asked Questions
Do I need a doctor’s referral for a calcium score test?
No, many imaging centers let you schedule directly without a referral. However, having a doctor order the scan increases the chance your insurance will cover it and ensures someone interprets the result for you.
Is a calcium score test covered by insurance?
Medicare covers it in certain circumstances, but most private insurers treat it as a screening test and do not cover it. Call your insurer to confirm coverage before scheduling.
How long does a calcium score test take?
The actual scan takes about 10 to 15 minutes. Plan on being at the imaging center for 30 to 45 minutes total, including check-in and preparation.
What is a normal calcium score?
A score of zero is considered normal and indicates no detectable coronary calcium. This is associated with a very low risk of heart attack over the next decade.
Getting a calcium score test is a straightforward process once you know the options. Compare prices, confirm what is included, and make sure you have a plan for interpreting the result with a healthcare provider. The test is a tool — useful when applied to the right person at the right time, but not a substitute for an honest conversation with your doctor about your overall heart health.
