CT coronary angiograms (CCTAs) are performed at hospitals and outpatient imaging centers equipped with advanced CT scanners. Most people need a referral from a doctor to book one, but finding the right facility is straightforward once you know what to look for.
Types of Facilities That Offer CCTA
Three main types of facilities perform CT coronary angiograms: hospital radiology departments, freestanding outpatient imaging centers, and specialized cardiology clinics with on-site CT equipment. Academic medical centers and large hospital systems almost always have the necessary scanners. Outpatient imaging centers are increasingly common in suburban areas, and they often offer shorter wait times and lower prices than hospitals.
Not every CT scanner can produce diagnostic-quality images of the coronary arteries. The procedure requires a scanner with at least 64 slices, which provides the speed and resolution needed to capture clear images of arteries that are constantly moving with your heartbeat. Most modern imaging centers use 128-slice or 256-slice scanners, which are even better. If you’re comparing facilities, it’s worth asking what scanner they use.
How to Find a Qualified Facility Near You
The most reliable way to locate a facility is through the American College of Radiology’s online Accredited Facility Search. This database lets you search by location and imaging type, filtering specifically for accredited cardiac CT centers. ACR accreditation means the facility has met standards for equipment quality, staff qualifications, and image accuracy. You can access it at acr.org.
Your cardiologist or primary care doctor will also typically refer you to a specific facility they trust. If you have a preference for a particular center, such as one closer to home or one with evening hours, ask your doctor whether they can send the referral there instead.
You’ll Likely Need a Referral
CCTA is a diagnostic test, not a screening tool. In most cases, a physician needs to order it based on your symptoms or clinical situation. Insurance companies, including Medicare, require documentation that the test is medically necessary before they’ll cover it.
Medicare specifically covers CCTA when you have symptoms like chest pain, unexplained shortness of breath, or signs suggesting angina, combined with an intermediate probability of coronary artery disease. That means your doctor has determined you’re not so low-risk that a scan would be pointless, but not so high-risk that you should go straight to an invasive catheter-based angiogram. Coverage also applies when a stress test has come back unclear or when you’re unable to exercise for a traditional stress test. Most private insurers follow similar criteria.
Current guidelines from the American Heart Association and American College of Cardiology recommend CCTA as an alternative to invasive angiography for people with acute chest pain and no known coronary artery disease. It’s a useful tool for ruling out blockages and plaque without the risks of a catheter procedure.
CCTA vs. a Coronary Calcium Score
These two tests are easy to confuse because both use CT scanners and look at the heart, but they serve different purposes and aren’t interchangeable. A coronary calcium score is a quick, low-dose scan that measures calcified plaque in your arteries. It’s primarily used as a screening tool in people without symptoms to estimate future heart disease risk. Many imaging centers offer calcium scores for a flat cash price, sometimes without a referral.
A CCTA is far more detailed. It uses contrast dye injected into a vein to produce high-resolution 3D images of your coronary arteries, showing both calcified and non-calcified plaque as well as any narrowing. It’s used in people who already have symptoms. A facility that offers calcium scoring doesn’t necessarily perform full CCTAs, so make sure you’re booking the right test.
What to Expect Before the Scan
Facilities will give you preparation instructions when you schedule. The standard requirements include fasting for at least four hours before the scan while staying hydrated with clear fluids up to one hour beforehand. You’ll need to avoid caffeine for 12 hours prior, because caffeine raises your heart rate and can degrade image quality. If you take medications for erectile dysfunction (such as sildenafil or tadalafil), you’ll need to stop those at least 48 hours before the scan, since the facility may give you nitroglycerin to dilate your coronary arteries, and combining the two can cause a dangerous drop in blood pressure.
Keep taking your regular heart medications unless told otherwise. When you arrive, the team will check your heart rate and rhythm. If your heart rate is above about 65 beats per minute, they may give you a medication to slow it down temporarily, which improves image clarity. The scan itself takes only a few minutes once you’re positioned.
Factors That May Affect Your Eligibility
A few medical conditions can complicate or prevent the procedure. Impaired kidney function is the main concern, because the contrast dye is processed by the kidneys. If you have a history of kidney problems, diabetes, heart failure, or are elderly, your doctor will likely check your kidney function with a blood test beforehand. Patients who are dehydrated, have low blood pressure, or regularly use anti-inflammatory drugs like ibuprofen also face higher risk of kidney-related complications from the dye.
You’ll also need to be able to lie flat and still for several minutes and follow breathing instructions during the scan. An irregular heart rhythm can reduce image quality, though newer scanners handle this better than older ones.
Cost Without Insurance
Pricing varies widely depending on the facility type and your location. Hospital-based scans tend to cost more than those at freestanding imaging centers due to facility fees. Research modeling has placed the baseline cost of a CCTA at up to around $1,100, though real-world prices at outpatient centers can be lower. If you’re paying out of pocket, call the imaging center’s billing department directly and ask for their cash or self-pay rate. Many centers offer significant discounts when insurance isn’t involved, and prices at competing facilities in the same city can differ by hundreds of dollars.