Medical Policy


Subject:  Computed Tomography to Detect Coronary Artery Calcification
Policy #:  RAD.00001Current Effective Date:  07/09/2013
Status:ReviewedLast Review Date:  05/09/2013

Description/Scope

This document addresses use of electron beam computed tomography (EBCT), helical computed tomography (CT) and multi-slice spiral CT (MSCT) scanning to detect coronary artery calcium (CAC). The rapid image acquisition time of these CT scanning techniques eliminates motion artifact related to the beating heart and thus, permits visualization of CAC. In asymptomatic individuals, CAC has been investigated as a risk factor for coronary artery disease and has been used to further evaluate individuals with known coronary artery disease (CAD).

Note: Please see the following related document for additional information:

Position Statement

Investigational and Not Medically Necessary:

The use of electron beam computed tomography (EBCT), helical CT or multi-slice spiral (also known as multi-row detector) CT (MSCT) is considered investigational and not medically necessary for the detection of coronary artery calcium, including, but not limited to, the following indications:

Rationale

General Considerations
The presence of CAC has been associated with an increased risk of cardiovascular events. The role of CAC as an independent predictor of risk in the assessment, either alone or in combination with conventional risk factors, of both asymptomatic and symptomatic individuals has been studied.

Risk Assessment in Asymptomatic Individuals
The Multi-Ethnic Study of Atherosclerosis (MESA) Trial is an ongoing, multi-center, prospective longitudinal study of asymptomatic individuals across four racial/ethnic groups to evaluate the long-term cardiovascular outcomes with a ten year follow-up of 6,772 asymptomatic participants after baseline risk assessment (including CAC measurement). The MESA study was launched in 2000. Detrano (2008) published interim results (median follow-up 3.9 years) that suggest that the CAC score is a predictor of subsequent clinically significant coronary heart disease (CHD) and may provide predictive information beyond that provided by standard risk factors, (i.e., the Framingham Risk Score [FRS]). The authors reported that after adjustment for standard risk factors, a doubling of the CAC score resulted in a 20% increase in the risk of a major coronary event (myocardial infarction/death from CHD) and a 25% increase in the risk of any coronary event. A limitation of this study was variation in CT acquisition and reading methods across the six study centers. The authors also caution against using the absolute calcium scores cited in the study and note that ethnic-specific calibrations of CAC scores are needed to adjust for baseline differences between different ethnic groups. Another limitation of this interim report is the small number of measured clinical events (72 non-fatal MI, 17 fatal coronary events, and 73 events of angina pectoris).

The data, collected thus far, from the MESA Trial have been studied and reported in multiple published studies, one of which was conducted by Lakoski and colleagues (2007) who looked at CAC scores and risk of future coronary events in women. This MESA cohort study included 3,601 asymptomatic women, age 45 to 84 years, judged to be at low risk for coronary disease based on FRS. The authors concluded that the presence of CAC in women at low FRS risk was predictive of future CHD and cardiovascular events. Compared with women with no detectable CAC, low risk women with a CAC score greater than 0 were at increased risk for CHD (HR 6.5, 95%; CI 2.6-16.4) and cardiovascular events (HR 5.2, 95%; CI 2.5-10.8). Low risk women with advanced CAC score (greater than or equal to 300) had a risk of 8.6% for having a cardiovascular event over a 3.75 year period, compared with 0.6% in low risk women with CAC score of 0 and 1.9% in low risk women with CAC score 1-99.

Polansky (2010) reported on a cohort of 5,878 asymptomatic subjects taken from the MESA population with a median follow-up of 5.8 years. Analysis of risk for coronary events was conducted comparing use of the conventional FRS System alone to inclusion of CAC scores, as part of the risk stratification model. With the addition of CAC to the model, an additional 23% of those who experienced events were reclassified as high risk, and an additional 13% who did not experience events were reclassified as low risk. In total, only 5.1% of the total MESA population was reclassified as a result of CAC scores. Limitations of this study include the need for validation of the results in broader trial populations. The authors acknowledge that higher event rates and different rates of reclassification may have been seen if the study population contained a larger proportion of higher risk individuals. Trial results may have changed with longer follow-up; also the fact that all CAC scores were revealed to both participants and their treating physicians may have impacted the five-year results seen in this trial.

Using 6814 asymptomatic intermediate-risk participants from the MESA population, Yeboah (2012) sought to improve the prediction accuracy and reclassification into high- and low-risk categories using 6 risk markers (CAC, carotid intima-media thickness, ankle-brachial index, brachial flow-mediated dilation, high-sensitivity C-reactive protein, and family history of CHD). With a median follow-up of 7.6 years, 94 participants had a CHD event (defined as myocardial infarction, angina followed by revascularization, resuscitated cardiac arrest, or CHD death) and 123 participants had a CVD event (defined as stroke or CVD death). With a hazard ratio of 2.60 (95% CI, 1.94-3.50), CAC was independently associated with incident CHD in multivariable analysis. Ankle-brachial index had a hazard ratio of 0.79 (95% CI, 0.66-0.95), high-sensitivity C-reactive protein had a hazard ratio of 1.28 (95% CI, 1.00-1.64), and family history had a hazard ratio of 2.18 (95% CI, 1.38-3.42). Carotid intima–media thickness and brachial flow–mediated dilation were not associated with incident CHD in multivariable analyses (hazard ratio 1.17 [95% CI, 0.95-1.45] and hazard ratio 0.95 [95% CI, 0.78-1.14]) respectively. The improvement in discrimination was assessed by comparing the area under the receiver operator characteristic curves (AUC) in models with and without the risk markers. For CAC, the incident CHD and the incidence of CVD, the AUC for the Framinghan Risk Score alone was 0.623 FRS with CAC 0.784 (p<0.001). Based on the presence of CSC, 51.1% of participants who had incident CHD and 54.9% of those who did not have incident CHD during follow-up period were reclassified either to low or high risk by the addition of CAC to the FRS; the net correct reclassification for events were 25.5% and 40.4% respectively. The authors caution that CAC imaging exposes individuals to ionizing radiation and the benefits and risks associated with incidental findings detected during CAC imaging remain unclear.

Budoff and colleagues (2007) used a large observational database of 25,253 asymptomatic individuals undergoing CAC scoring to develop risk-adjusted multivariable models incorporating CAC scores to predict all cause mortality. The authors reported that the CAC score provided incremental information, in addition to traditional risk factors in the prediction of all-cause mortality.

The Early Identification of Subclinical Atherosclerosis by Noninvasive Imaging Research (EISNER) trial looked at the use of CAC screening tests on the impact of medical management and CAD risk (Rozanski, 2011). A total of 713 participants were randomized into the no-scan group while 1424 participants were randomized into the scan group. Participants then returned for a clinic visit at 4 years at which time a questionnaire was used to determine CAD risk factors. The primary end point was change in the CAD risk profiles including a change in global risk determined by FRS. In the scan group, participants experienced a greater reduction in mean systolic blood pressure, serum low-density lipoprotein (LDL) cholesterol level and reduced waist circumference. The participants in the scan group also showed more of a tendency to lose weight compared to the no-scan group. The 2 groups did not differ in exercise activity, smoking behavior or glucose measurements. CAD risk, as summarized by FRS, rose in the no-scan group but remained the same in the scan group. The authors caution against generalizing the findings of this study to the general population. They could not adequately assess CAC scanning on diabetics and smokers due to the small number of participants with these risk factors. They also could not determine the extent to which CAC scanning drove CAD risk profiles as opposed to more intensive use and adherence to medications. Dietary habits were lacking in this study and an exercise activity measurement was by self-report as opposed to objective measurements. Further trials are necessary to determine whether these findings can be applicable to different populations and to determine whether CAC screening translates to reductions in adverse clinical events.

Nasir and colleagues (2012) reported on 44,052 asymptomatic individuals with traditional risk factors reported by questionnaire (current cigarette smoking, dyslipidemia, diabetes, hypertension, and family history of CHD) and sought to examine the relationship between the risk factors and CAC for predicting all-cause mortality. Participants were followed for a mean of 5.6 years. Individuals were classified as low risk (having no risk factors and CAC of zero), intermediate risk (1-2 risk factors and CAC 1 t o100) and high risk (greater than or equal to 2 risk factors and CAC greater than 100). A total of 19,898 individuals had no CAC on screening, 14,181 individuals had a CAC score of 1 to 100, 5,739 individuals had CAC score of 101 to 400, and 4,234 individuals had CAC score greater than 400. For risk factors, 18,819 had zero risk factors, 10,093 had 1 risk factor, 8754 had 2 risk factors and 6,386 individuals had greater than 2 risk factors for CAD. There were 901 deaths in the study population. For those with no risk factors for CAD, the annualized mortality rate was 1.84 deaths per 1000 person-years (95% CI, 1.62–2.09), 4.13 (95% CI, 3.60–4.75) for those with 1 risk factor, 5.78 (95% CI, 5.07–6.59) for those with 2 risk factors, and 9.11 (95% CI, 8.00–10.38) for those with greater than or equal to 3 risk factors. Looking at the CAC scores, the annualized mortality rate was 0.87 deaths per 1000 person-years (95% CI, 0.72–1.06) for those with CAC=0, 2.97 (95% CI, 2.61–3.37) for those with CAC scores 1 to 100, 6.90 (95% CI, 6.02–7.90) for those with CAC scores 101 to 400, and 17.68 (95% CI, 5.93–19.62) deaths per 1000 person-years among those with CAC scores greater than or equal to 400. This study is limited by the fact that all participants were referred for CAC testing and were not considered to be a random sample of the population and the risk factors were self-reported. There is also a lack of cardiovascular-specific mortality data.

In 2006, Anand and colleagues published a study specifically evaluating CAC scores as a risk stratification tool in 510 subjects with uncomplicated type II diabetes. Myocardial perfusion studies were performed in all subjects with high CAC scores and in a random sample of the remaining subjects. The trial participants were followed for a mean of 2.2 years for cardiovascular events. The authors reported that CAC scores were superior to established cardiovascular risk factors for predicting silent myocardial ischemia and short-term outcome. It should be noted that the CAC scores were not used to direct treatment management.

Risk Assessment in Symptomatic Individuals
Tota-Maharaj (2012) conducted a literature review of articles to evaluate the utility of CAC for low- to intermediate-risk individuals with chest pain. The authors looked at CAC scores in individuals with indeterminate chest pain symptoms and the sensitivity and specificity of CAC score for predicting obstructive CAD and the use of CAC in the triage of individuals who present to the emergency room with chest pain using the gatekeeper approach. In review of articles from 5 studies with a combined enrollment of more than 1000 participants, the sensitivity of CAC was found to be 96% to 100% with a specificity of 30% to 58% of CAC greater than 0 for obstructive CAD. The authors note that the "the absence of calcification does not always completely rule out the disease" and conversely "the detection of CAC may overestimate the clinical significance of CAD present in a given symptomatic patient." The authors propose a chest pain algorithm that uses an individual's likelihood of CAD based on their risk factors for CHD events and the nature of their chest pain followed by CAC scoring. Their recommendation is that if CAC scoring is 0 in low-risk individuals then no further testing is necessary. The authors note that further prospective randomized research is necessary to confirm that their algorithm is safe and effective in these individuals.

A study by Kim (2012) looked at the clinical implications of symptomatic individuals with a CAC score of zero. The authors looked at the medical records of 2,088 individuals with symptoms of CAD who had CAC scoring. A total of 1,114 individuals had a CAC score of zero. Of those 1,114 individuals, 158 had detection of coronary artery plaques and obstructive CAD was found in 48. The follow-up period was 1,033 days and included gathering data for major adverse cardiac events. Follow-up was completed by review of medical records and/or telephone interviews. For the 48 individuals with obstructive CAD and CAC score of zero, 25 of them had early elective revascularization. There were 14 major adverse cardiac events consisting of cardiac death, myocardial infarction, unstable angina, and late revascularization. This study is limited by its retrospective design and all of the individuals were from the same ethnic background so it cannot be applied to the general population.

Consensus Reports, Guidelines and Scientific Statements
In 2005, the American Heart Association (AHA) published a consensus statement regarding the role of noninvasive testing of women with suspected CAD (Mieres, 2005). The consensus statement considered the incremental value of CAC scores, compared to traditional risk factor assessment, and focused on one observational study that included a large number of women. The report concluded that additional studies were needed to establish female-specific cut points of CAC scores defining high risk status in women. The consensus statement offered the following conclusion:

Additional high-quality data are needed from larger cohorts that specifically address CAD outcomes in women to more precisely establish female specific CAC risk cut points and to more precisely quantify the incremental prognostic value beyond the measurement of conventional coronary risk factors. Until then, consistent with recent consensus statements, CAC testing for CAD risk detection should be limited to clinically selected women at intermediate risk.

In 2006, the AHA published a scientific statement on the assessment of CAD by cardiac computed tomography (Budoff, 2006). Most of the document reviewed the clinical utility of CAC scoring for determining prognosis and diagnosis. Within this document, there were no Class I* or IIa** recommendations regarding coronary artery calcium detection by CT. The following IIb recommendations were offered:

A 2007 clinical consensus document co-written by the American College of Cardiology Foundation and the American Heart Association (ACCF/AHA) provided updated information on CAC measurement, acknowledging the lack of rigorous evidence addressing the clinical utility of CAC measurement (Greenland, 2007). This document notes that Clinical Expert Consensus Documents concern topics for which, "The evidence base, the experience with the technology and/or the clinical practice are not considered sufficiently well developed to be evaluated by the formal American College of Cardiology/American Heart Association (ACC/AHA) Guidelines process. Often the topic is the subject of considerable ongoing investigation." The findings of this expert panel were consistent with the 2006 AHA scientific statement (Budoff, 2006) in that the Committee judged that it may be reasonable to consider use of CAC measurement in asymptomatic individuals with intermediate CHD risk. This was based on the possibility that such persons might be reclassified to a higher risk status if high CAC scores are found; thereby subsequent treatment management may be modified. However, there was inadequate data to show that changes in management result in improved health outcome. The Committee did not recommend use of CAC measurement in other selected groups, such as those with low or high CHD risk (based on the FRS). However, this paper noted, "In general, CAC measurement has not been compared to alternative approaches to risk assessment in head-to-head studies. Therefore, the question of whether there is evidence that CAC measurement is better than other potentially competing tests for intermediate risk patients for modifying cardiovascular disease risk estimate cannot be adequately answered from the available data." In addition, the ACCF/AHA 2010 guideline for asymptomatic individuals agrees that "Evidence is not available to show that risk assessment using CAC scoring improves clinical outcomes by reducing mortality or morbidity from CAD" (Greenland, 2010).

In 2009, the United States Preventive Services Task Force (USPSTF) issued recommendations on using nontraditional risk factors in coronary heart disease risk assessment. The USPSTF gave an "I"** recommendation against screening asymptomatic men and women with no history of CHD to prevent CHD events. The nontraditional risk factors listed in this recommendation include CAC score on EBCT. This recommendation was based on a review of 8 cohort studies. Five of the 8 studies were rated as fair quality, and while the 8 included studies reported statistically significant relative risks for coronary events with increasing CAC scores, none of the studies addressed an intermediate-risk cohort, none of the studies were population-based or free of selection bias, and none of the studies had appropriately measured or controlled for traditional risk factors. (USPSTF, 2009; see the Definitions section for an explanation of the rating system).

The Institute for Clinical Systems Improvement updated its Healthcare Guideline for Preventive Services for Adults in 2012. They recommend against routine screening for coronary artery calcium in those individuals at low risk for coronary heart disease events.

Conclusions
The role of CAC scoring, particularly for determining its incremental value for risk stratification in those with intermediate FRS, continues to be studied. Although randomized controlled trials and observational studies suggest that CAC scores may predict risk for future coronary events, there is insufficient evidence in the literature, to date, to demonstrate how screening with CAC will impact treatment management and clinical outcomes (Bonow, 2009). Also, the evidence continues to show variability in the accuracy of test results from various CT scanners, as well as ongoing concerns about the variable amounts of radiation exposure delivered by these scans (Bluemke, 2008; Budoff, 2006; Gerber, 2009; Gibbons, 2009; Kramer, 2007).

Note:
The presence of extensive CAC precludes the use of CCTA. Therefore, an assessment of CAC is often performed in combination with CCTA. Many of the recently published studies of CAC explore its role in conjunction with CCTA. These studies are not considered in this document. CCTA is addressed separately in RAD.00035.

Background/Overview

Computerized axial tomography, also called CT, CT scan, or CAT scan, is an x-ray technique that uses an x-ray-sensing unit which rotates around the body, along with a computer to create cross-sectional images. The images are generated by a computer synthesis of x-ray transmission data obtained for many different directions in a given plane. EBCT and spiral or helical CT scans are types of CT scans that have very high speeds of image acquisition which eliminate the motion artifact of the beating heart, and thus, permit imaging of CAC. Since CAD may remain silent until a major catastrophic event occurs, it has been hypothesized that detection of coronary calcium in asymptomatic individuals could provide additional data on cardiac risk; this could potentially lead to changes in diet, lifestyle, and treatment management. It is thought that these changes could potentially reduce the risk of myocardial infarction (MI).

Definitions

Computed tomography (CT): An imaging technique that creates multiple cross-sectional images of the body by using special x-rays and computer enhancement to detect disease or abnormalities.

Coronary artery disease: A disease characterized by narrowing or blockage of the blood vessels that supply blood to the heart.

Electron beam CT (also known as Ultrafast CT): A type of CT that uses an electron gun rather than a standard x-ray tube to generate x-rays, thus permitting very rapid scanning, on the order of 50-100 milliseconds per image.

Framingham Risk Scoring System (FRS): The most-commonly used, multi-variable scoring system (in the U.S.) and the most extensively validated quantitative assessment tool for determining an individual's potential risk of developing CHD and of experiencing a significant coronary event. It includes the following major risk factors: gender, total cholesterol, high-density lipoprotein (HDL) cholesterol, systolic blood pressure (or on treatment for hypertension), cigarette smoking, and age.

Helical CT (also known as spiral CT scanning): A type of CT that creates images at greater speed than conventional CT by continuously rotating a standard x-ray tube around the individual so that data are gathered in a continuous spiral or helix rather than individual slices.

Multislice spiral CT (MSCT) (also known as multi-row detector CT or MDCT): A technical evolution of helical CT, it uses CT machines equipped with an array of multiple x-ray detectors that can simultaneously image multiple sections during a rapid volumetric image acquisition..

Tomograph: An apparatus for moving an x-ray source in one direction as the film is moved in the opposite direction, thus showing in detail a predetermined plane of tissue while blurring or eliminating detail in other planes.

Note: According to the USPSTF Task Force ratings on strength of recommendations, the USPSTF grades its recommendations according to one of five classifications (A, B, C, D, I) reflecting the strength of evidence and magnitude of net benefit (benefits minus harms) as follows:

A.— The USPSTF recommends the service. There is high certainty that the net benefit is substantial.
B.— The USPSTF recommends the service. There is high certainty that the net benefit is moderate or there is moderate certainty that the net benefit is moderate to substantial.
C.— Clinicians may provide this service to selected participants depending on individual circumstances. However, for most individuals without signs or symptoms there is likely to be only a small benefit from this service.
*D.— The USPSTF recommends against the service. There is moderate or high certainty that the service has no net benefit or that the harms outweigh the benefits.
**I.— The USPSTF concludes that the evidence is insufficient to assess the balance of benefits and harms of the service. Evidence is lacking, of poor quality, or conflicting, and the balance of benefits and harms cannot be determined. (USPSTF, 2009)

Coding

The following codes for treatments and procedures applicable to this document are included below for informational purposes.  A draft of future ICD-10 Coding (effective 10/01/2014) related to this document, as it might look today, is included below for your reference.  Inclusion or exclusion of a procedure, diagnosis or device code(s) does not constitute or imply member coverage or provider reimbursement policy.  Please refer to the member's contract benefits in effect at the time of service to determine coverage or non-coverage of these services as it applies to an individual member. 

When services are Investigational and Not Medically Necessary:

CPT 
71250Computed tomography, thorax; without contrast material
  
HCPCS 
S8092Electron beam computed tomography (also known as ultrafast CT, cine CT)
  
ICD-9 Diagnosis 
414.00-414.9Chronic ischemic heart disease
429.2Cardiovascular disease, unspecified
V81.0Special screening for ischemic heart disease
  
ICD-10 DiagnosisICD-10-CM draft codes; effective 10/01/2014:
I25.10-I25.119Atherosclerotic heart disease of native coronary artery
I25.6Silent myocardial ischemia
I25.700-I25.799Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
I25.810-I25.812Atherosclerosis of other coronary vessels without angina pectoris
I25.9Chronic ischemic heart disease, unspecified
I51.9Heart disease, unspecified
Z13.6Encounter for screening for cardiovascular disorders

When services are also Investigational and Not Medically Necessary:

CPT 
75571Computed tomography, heart, without contrast material, with quantitative evaluation of coronary calcium
  
ICD-9 Diagnosis 
 All diagnoses
  
ICD-10 DiagnosisICD-10-CM draft codes; effective 10/01/2014:
 All diagnoses
  
References

Peer Reviewed Publications:

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  4. Bonow RO. Should coronary calcium screening be used in cardiovascular prevention strategies. N Engl J Med. 2009; 361(10):990-997.
  5. Budoff MJ, McClelland RL, Nasir K, et al. Cardiovascular events with absent or minimal coronary calcification: the Multi-Ethnic Study of Atherosclerosis (MESA). Am Heart J. 2009; 158(4):554-561.
  6. Budoff MJ, Nasir K, McClelland RL, et al. Coronary calcium predicts events better with absolute calcium scores than age-sex-race/ethnicity percentiles: MESA (Multi-Ethnic Study of Atherosclerosis). J Am Coll Cardiol. 2009; 53(4):345-352.
  7. Budoff MJ, Shaw LJ, Liu ST, et al. Long-term prognosis associated with coronary calcification: observations from a registry of 25,253 patients. J Am Coll Cardiol. 2007; 49(18):1860-1870.
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  32. Rozanski A, Gransar H, Shaw LJ, et al. Impact of coronary artery calcium scanning on coronary risk factors and downstream testing the EISNER (Early Identification of Subclinical Atherosclerosis by Noninvasive Imaging Research) prospective randomized trial. J Am Coll Cardiol. 2011; 57(15):1622-1632.
  33. Schenker MP, Dorbala S, Hong EC, et al. Interrelation of coronary calcification, myocardial ischemia, and outcomes in patients with intermediate likelihood of coronary artery disease: a combined positron emission tomography/computed tomography study. Circ. 2008; 117(13):1693-1700.
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Government Agency, Medical Society, and Other Authoritative Publications:

  1. ACR-NASCI-SPR Practice Guideline for the performance and interpretation of cardiac computed tomography (CT). 2011. Available at:http://www.acr.org/~/media/ACR/Documents/PGTS/guidelines/CT_Cardiac.pdf. Accessed on February 27, 2013.
  2. Bluemke DA, Achenbach S, Budoff M, et al. Noninvasive coronary artery imaging: magnetic resonance angiography and multidetector computed tomography angiography: a scientific statement from the American Heart Association committee on cardiovascular imaging and intervention of the council on cardiovascular radiology and intervention, and the councils on clinical cardiology and cardiovascular disease in the young. Circulation 2008; 118(5):586-606.
  3. Budoff MJ, Achenbach S, Blumenthal RS, et al. Assessment of Coronary Artery Disease by Cardiac Computed Tomography. A Scientific Statement from the American Heart Association Committee on Cardiovascular Imaging and Intervention, Council on Cardiovascular Radiology and Intervention, and Committee on Cardiac Imaging, Council on Clinical Cardiology. Circ. 2006; 114(16):1761-1791.
  4. California Technology Assessment Forum® (CTAF). Utility of coronary artery calcium measurements in cardiovascular disease. February 2005. Available at: http://www.ctaf.org/sites/default/files/assessments/570_file_Utility_of_Coronary_Artery_Calcium_Measurements_in_Cardiovascular_Disease.pdf. Accessed on February 27, 2013.
  5. Gerber TC, Carr JJ, Arai AE, et al. Ionizing radiation in cardiac imaging: a science advisory from the American Heart Association Committee on Cardiac Imaging of the Council on Clinical Cardiology and Committee on Cardiovascular Imaging and Intervention of the Council on Cardiovascular Radiology and Intervention. Circulation. 2009; 119(7):1056-1065.
  6. Gordon, TJ. Chapter 4: The Delphi Method. In: Glenn JC, Gordon TJ, Editors. Futures Research Methodology V3.0. The Millennium Project. 2009. Available at: www.millennium-project.org/FRMv3_0/04-Delphi.pdf. Accessed on February 27, 2013.
  7. Greenland P, Alpert JS, Beller GA, et al. 2010 ACCF/AHA guideline for assessment of cardiovascular risk in asymptomatic adults: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines. J Am Coll Cardiol. 2010; 56(25):e50-103.
  8. Greenland P, Bonow RO, Brundage BH, et al. ACCF/AHA 2007 Clinical expert consensus document on coronary artery calcium scoring by CT in global cardiovascular risk assessment and in evaluation of patients with chest pain: a report of the American College of Cardiology Foundation Clinical Expert Consensus Task Force (ACCF/AHA writing committee to update the 2000 expert consensus document on electron beam computed tomography). J Am Coll Cardiol. 2007; 49(3):378-402.
  9. Grundy SM, Cleeman JI, Merz CN, et al. Implications of recent clinical trials for the National Cholesterol Education Program Adult Treatment Panel III guidelines. Circ. 2004; 110(2):227-239.
  10. Hopkins PN, Ellison RC, Province MA, et al. Association of coronary artery calcified plaque with clinical coronary heart disease in the National Heart, Lung, and Blood Institute's Family Heart Study. Am J Cardiol. 2006; 97(11):1564-1569.
  11. Institute for Clinical Systems Improvement (ICSI). Health Care Guideline: Preventive Services for Adults. 18th edition. September 2012. Available at: http://www.icsi.org/guidelines_and_more/gl_os_prot/preventive_health_maintenance/. Accessed on February 27, 2013.
  12. Kramer CM, Budoff MJ, Fayad ZA, et al. ACCF/AHA 2007 clinical competence statement on vascular imaging with computed tomography and magnetic resonance: a report of the American College of Cardiology Foundation/American Heart Association/American College of Physicians Task Force on Clinical Competence and Training. J Am Coll Cardiol. 2007; 50(11):1097-1114.
  13. Mieres JH, Shaw LJ, Arai A, et al. Role of non-invasive testing in the clinical evaluation of women with suspected coronary artery disease: Consensus statement from the Cardiac Imaging Committee, Council on Clinical Cardiology and the Cardiovascular Imaging and Intervention Committee, Council on Cardiovascular Radiology and Intervention, American Heart Association. Circ. 2005; 111(5):682-696.
  14. National Cholesterol Education Program. Third report of the National Cholesterol Education Program (NCEP) Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III). JAMA. 2001; 285:2486-2497. Available at: http://www.nhlbi.nih.gov/guidelines/cholesterol/atp3full.pdf. Accessed on February 28, 2013.
  15. O'Rourke RA, Brundage BH, Froelicher VF, et al. American College of Cardiology/American Heart Association expert consensus document on electron-beam computed tomography for the diagnosis and prognosis of coronary artery disease. J Am Coll Cardiol. 2000; 36(1):326-340.
  16. Oudkerk M, Stillman AE, Halliburton SS, et al; European Society of Cardiac Radiology, North American Society for Cardiovascular Imaging. Coronary artery calcium screening: current status and recommendations from the European Society of Cardiac Radiology and North American Society for Cardiovascular Imaging. Eur Radiol. 2008; 18(12):2785-2807.
  17. Perk J, De Backer G, Gohlke H, et al. European guidelines on cardiovascular disease prevention in clinical practice (version 2012) : the fifth joint task force of the European society of cardiology and other societies on cardiovascular disease prevention in clinical practice (constituted by representatives of nine societies and by invited experts). Int J Behav Med. 2012; 19(4):403-488.
  18. Taylor AJ, Cerqueira M, Hodgson JM, et al. ACCF/SCCT/ACR/AHA/ASE/ASNC/NASCI/SCAI/SCMR 2010 appropriate use criteria for cardiac computed tomography: a report of the American College of Cardiology Foundation Appropriate Use Criteria Task Force, the Society of Cardiovascular Computed Tomography, the American College of Radiology, the American Heart Association, the American Society of Echocardiography, the American Society of Nuclear Cardiology, the North American Society for Cardiovascular Imaging, the Society for Cardiovascular Angiography and Interventions, and the Society for Cardiovascular Magnetic Resonance. J Am Coll Cardiol. 2010; 56(22):1864-1894.
  19. U.S. Preventive Services Task Force. Using nontraditional risk factors in coronary heart disease risk assessment: Recommendation Statement. Report of the U.S. Preventive Services Task Force. Rockville, MD: Agency for Healthcare Research and Quality (AHRQ); October 2009. Available at: http://www.uspreventiveservicestaskforce.org/uspstf/uspscoronaryhd.htm. Accessed on February 28, 2013.
Web Sites for Additional Information
  1. American Heart Association (AHA). Available at: http://www.americanheart.org. Accessed on February 27, 2013.
  2. Multi-Ethnic Study of Atherosclerosis (MESA) Coordinating Center, University of Washington, Seattle, WA. Available at: http://www.mesa-nhlbi.org/CACReference.aspx and http://www.mesa-nhlbi.org/Publications.aspx. Accessed on February 27, 2013.
  3. National Heart, Lung, and Blood Institute. What is a coronary calcium scan? Available at: http://www.nhlbi.nih.gov/health/health-topics/topics/cscan/.  Accessed on February 27, 2013.
  4. National Heart Lung and Blood Institute. Framingham Heart Study. Risk Assessment Tool for Estimating 10-year Risk of Developing Hard CHD (Myocardial Infarction and Coronary Death). Available at: http://hp2010.nhlbihin.net/atpiii/calculator.asp?usertype=prof. Accessed on February 27, 2013.
  5. Radiological Society of North America, Inc. RadiologyInfo™. Cardiac CT for Calcium Scoring. May 24, 2011. Available at: http://www.radiologyinfo.org/en/pdf/ct_calscoring.pdf. Accessed on February 27, 2013.
  6. Redberg RF, Benjamin EJ, Bittner V, et al. ACCF/AHA 2009 Performance measures for primary prevention of cardiovascular disease in adults. A report of the American College of Cardiology Foundation/American Heart Association Task Force on performance measures (writing committee to develop performance measures for primary prevention of cardiovascular disease): developed in collaboration with the American Academy of Family Physicians; American Association of Cardiovascular and Pulmonary Rehabilitation; and Preventive Cardiovascular Nurses Association: endorsed by the American College of Preventive Medicine, American College of Sports Medicine, and Society for Women's Health Research. Circ. 2009; 120(13):1296-1336. Available at: http://content.onlinejacc.org/article.aspx?articleid=1140094. Accessed on February 27, 2013.
Index

Electron Beam Computed Tomography
Helical CT
High-Speed Computed X-Ray Tomography
Multirow Detector CT (MDCT)
Multislice Spiral CT (MSCT)
Rapid Acquisition X-Ray Computed Tomography
Ultrafast® Computed Tomography (CT) 

The use of specific product names is illustrative only. It is not intended to be a recommendation of one product over another, and is not intended to represent a complete listing of all products available.

Document History
StatusDateAction
Reviewed05/09/2013Medical Policy & Technology Assessment Committee (MPTAC) review. Updated Rationale, Definitions and References.
Reviewed05/10/2012MPTAC review. Updated Rationale, Definitions, References, and Web Sites for Additional Information.
Reviewed05/19/2011MPTAC review. Updated Rationale, Definitions and References.
Reviewed05/13/2010MPTAC review. No change to stance. The Rationale and References were updated.
 01/01/2010Updated coding section with 01/01/2010 CPT changes; removed CPT 0144T, 0147T, 0149T, 0151T deleted 12/31/2009.
Revised05/21/2009MPTAC review. No change to stance. As part of a cardiac risk assessment for symptomatic individuals and in conjunction with CCTA have been added to the examples of indications considered investigational and not medically necessary. The Rationale, Background, References and Coding sections have been updated.
Reviewed05/15/2008MPTAC review. No change to stance. The Rationale section was updated with the results of the recently published MESA Trial (Detrano, 2008; Lakoski, 2007). References were updated also.
Reviewed02/21/2008MPTAC review. No change to stance. The phrase "investigational/not medically necessary" was clarified to read "investigational and not medically necessary." This change was approved at the November 29, 2007 MPTAC meeting. References were updated.
Reviewed03/08/2007MPTAC review. No change to stance. The Rationale, References, and Coding sections were updated.
Reviewed03/23/2006MPTAC review. No changes to stance. References were updated.
 01/01/2006Updated coding section with 01/01/2006 CPT/HCPCS changes.
 11/17/2005Added reference for Centers for Medicare and Medicaid Services (CMS) – National Coverage Determination (NCD).
Revised04/28/2005MPTAC review. Revision based on: Pre-merger Anthem and Pre-merger WellPoint Harmonization.
Pre-Merger OrganizationsLast Review DateDocument NumberTitle
Anthem, Inc.01/29/2004RAD.00001Electron Beam Computed Tomography (EBCT), Whole Body CT Scanning
WellPoint Health Networks, Inc.12/02/20044.01.09

Ultrafast Computerized Tomography (CT) Scanning for Coronary Disease