Is a coronary calcium (CAC) score worth it?
Last reviewed: August 2026 · Grade: Strong (see full card on Scans)
A coronary artery calcium (CAC) score is a low-dose CT scan that counts calcified plaque in the heart's arteries and reports it as an Agatston score, from 0 to over 1,000. It's the single test on this site with the strongest evidence base for asymptomatic cardiovascular risk stratification — and one of the more expensive add-ons in an executive health package. This page answers the two questions people actually search for: does the evidence support it, and what does it really cost in Singapore in 2026.
What the evidence says
The core evidence comes from the Multi-Ethnic Study of Atherosclerosis (MESA), a large prospective cohort (Detrano et al., NEJM 2008, PMID 18367736), which followed over 6,700 asymptomatic adults across four ethnic groups and found CAC score was a strong, independent predictor of coronary heart disease events — outperforming traditional risk factors (age, cholesterol, blood pressure, smoking) alone. A CAC score of zero is associated with a very low near-term cardiovascular event rate ("power of zero"), which is itself clinically useful: it can support de-escalating statin therapy in a borderline-risk patient who would otherwise be started on one by risk calculator alone. A high score (typically >100, and especially >400) reclassifies a patient into a higher-risk category that changes management.
Major guideline bodies (ACC/AHA) support selective use of CAC scoring in adults at intermediate cardiovascular risk where the result would change a treatment decision — chiefly, whether to start statin therapy. It is not recommended as a universal screening test for everyone, and it is not useful for patients already established on statin therapy (calcification can increase as plaque stabilises, which is a good sign in that context, not a bad one — a nuance worth knowing before re-testing).
Real Singapore pricing, 2026
Cross-checked against live pricing from Singapore private providers (heartspecialist.sg, healthscreening.sg/atamed.sg) in August 2026:
| Option | Typical price (SGD) | Notes |
|---|---|---|
| Standalone CT coronary calcium score | S$300–403 | The scan alone, no consult |
| "Advanced Heart Check-Up" package (CAC + doctor consult) | ~S$878 nett | Bundled; consult reviews the result and discusses next steps |
| Full CT coronary angiogram (CTCA) | S$1,000–1,200 | A different, more detailed test — only indicated if CAC or symptoms suggest it; not a routine upgrade |
The standalone scan is the rational default for someone who has already discussed the decision with their own doctor and just needs the number. The bundled package is worth the premium mainly if you don't yet have a doctor who will interpret the result and translate it into a statin/no-statin decision — the number by itself isn't actionable without that conversation.
Bottom line
A CAC score is one of the few tests on this site that is both Strong-graded and commonly sold to people it wasn't studied for (universal "longevity" screening rather than intermediate-risk statin decision-making). It's worth paying for if you're genuinely undecided about statin therapy and want data instead of a population-average calculator. It's not worth paying for as a routine annual add-on, and it's not a substitute for the basic tier of testing (lipid panel, ApoB) that should come first — see the full testing protocol for how this fits into a budget-tiered plan.
Related: full evidence card for CAC on the Scans page · Basic/Intermediate/Advanced testing protocol · how grades are assigned.