Summary & Overview
CPT 0993T: Perivascular Fat Cardiac Risk Assessment, Add-on to Cardiac CT
CPT code 0993T denotes an add-on imaging service performed alongside a primary cardiac computed tomography (CT) procedure that uses software to analyze perivascular fat and integrate patient-specific clinical data to produce a cardiac risk assessment. The service is interpreted by a qualified healthcare provider and documented in a formal report. The code matters nationally as imaging and AI-enabled quantitative analyses of perivascular adipose tissue are emerging tools for cardiovascular risk stratification and may influence imaging workups, clinical decision-making, and payer coverage policies.
Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for perivascular fat analysis, the service definition and typical sites of service, and the implications for billing as an add-on CT service. The publication summarizes payer coverage patterns and benchmarks where available, highlights relevant policy and coding considerations for integration of software-based imaging analyses, and outlines operational considerations for providers and billing staff.
The report is intended for a national audience of clinicians, imaging administrators, and revenue cycle professionals seeking a concise explanation of CPT code 0993T, its clinical role, and how it fits into contemporary cardiac imaging and payer landscapes. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 0993T is an add-on cardiac computed tomography (CT) service in which a provider performs a cardiac risk assessment using software that analyzes perivascular fat (fat surrounding coronary blood vessels). The analysis incorporates patient-specific clinical data, and a qualified healthcare provider interprets the software output and provides a written report.
Service Type: Imaging-based cardiac risk assessment (add-on to a primary cardiac CT procedure)
Typical Site of Service: Outpatient imaging center or hospital radiology/cardiology department, performed in conjunction with a primary cardiac CT procedure.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 62-year-old man with intermediate cardiovascular risk is referred for a coronary CT angiography (CCTA) to evaluate chest pain and assess coronary atherosclerotic burden. During the CCTA appointment, volumetric chest images are acquired. The ordering cardiologist requests an adjunctive, software-based perivascular adipose tissue (PVAT) analysis to generate a cardiac risk assessment that incorporates the CT-derived PVAT signal and patient-specific clinical data (age, sex, risk factors, medication history). A qualified imaging physician (cardiologist or radiologist) performs the interpretation of the PVAT risk analysis output, integrates it with the CCTA findings, and issues a combined report describing the perivascular fat–based risk metric, its clinical implications, and recommendations for follow-up or further testing.
Typical workflow:
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Patient presents to an outpatient imaging center or hospital radiology/cardiac CT suite for CCTA.
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CT technologist performs cardiac-gated CT acquisition per protocol.
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Post-processing technologist runs the PVAT analysis software as an add-on to the primary CCTA dataset.
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A credentialed physician reviews the software output, interprets the PVAT risk assessment in the clinical context, and documents findings in the radiology/cardiology report.
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Billing is submitted with the primary CCTA procedure code and the add-on PVAT analysis code
0993Tappended to the primary procedure claim.
Typical site of service: Outpatient imaging center, hospital outpatient department, or inpatient radiology/cardiac imaging suite.
Typical patient scenario: An adult with atypical chest pain and multiple risk factors (hypertension, hyperlipidemia, family history of premature coronary artery disease) undergoing CCTA where additional risk stratification using software-derived perivascular fat analysis is requested to refine cardiovascular risk assessment and guide management decisions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the interpreting physician's professional component for the PVAT analysis, if technical component billed separately. |
TC | Technical component | Use when reporting only the technical component of the imaging study when applicable to separate facility charges from physician interpretation. |
59 | Distinct procedural service | Use when another distinct procedural service is performed the same day and documentation supports separate, distinct services (use cautiously per payer guidance). |
25 | Significant, separately identifiable E/M service | Use when a significant, separate evaluation and management service is provided on the same day as the imaging interpretation and clearly documented. |
53 | Discontinued procedure | Use if the imaging acquisition or PVAT analysis is started but discontinued for patient-related or safety reasons. |
52 | Reduced services | Use if the PVAT analysis or associated imaging was performed but substantially reduced from the typical service. |
91 | Repeat clinical diagnostic laboratory test | Not typically applicable to imaging analyses but occasionally used for repeat software output validation per payer rules — use per payer policy. |
Q6 | Service furnished under an outpatient CAH | Use if the service is furnished under outpatient Critical Access Hospital billing rules, when applicable. |
RT | Right side | Not typically applicable to cardiac CT; included when laterality or side-specific modifiers are required by payer (rare for cardiac imaging). |
LT | Left side | As above for RT, used only if a payer requires laterality for a cardiac imaging component. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
207RC0000X | Cardiovascular Disease (Cardiology) | Cardiologists frequently order and interpret CCTA and adjunctive PVAT analyses. |
208M00000X | Diagnostic Radiology | Radiologists with cardiac imaging expertise perform CCTA interpretation and PVAT software review. |
363A00000X | Nuclear Cardiology (Cardiac Imaging) | Cardiac imaging specialists who interpret advanced cardiac imaging studies may perform integrated risk assessments. |
207RH0000X | Interventional Cardiology | Interventional cardiologists may use PVAT risk data to inform procedural planning or risk stratification. |
292U00000X | Vascular & Interventional Radiology | Vascular imaging specialists involved in cardiac CT programs may participate in interpretation and reporting. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
I20.9 | Angina pectoris, unspecified | Common indication for coronary CT angiography and adjunctive PVAT risk assessment when patients present with chest pain. |
I25.10 | Atherosclerotic heart disease of native coronary artery without angina pectoris | Chronic coronary disease where PVAT analysis may help refine risk beyond anatomy and calcium burden. |
R07.9 | Chest pain, unspecified | Symptom driving noninvasive coronary evaluation; PVAT analysis can be added to CCTA performed for chest pain. |
I48.91 | Unspecified atrial fibrillation | Cardiac comorbidities that often coexist with coronary disease; clinicians may obtain CCTA and adjunctive risk metrics in comprehensive cardiac evaluations. |
E78.5 | Hyperlipidemia, unspecified | A cardiovascular risk factor relevant to interpretation of PVAT-derived risk metrics and overall patient risk stratification. |
I10 | Essential (primary) hypertension | Common comorbidity contributing to coronary risk and included in patient-specific data for PVAT analysis. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
75574 | Computed tomography, heart, without contrast, with contrast, including coronary CT angiography when performed; with quantitative evaluation of coronary calcium scoring if performed | Represents the primary coronary CT angiography acquisition often billed when performing CCTA; 0993T is an add-on to the primary cardiac CT procedure like 75574. |
75571 | Computed tomography, heart, without contrast, for evaluation of coronary calcium score | Coronary calcium scoring may be performed in conjunction with CCTA acquisition; PVAT analysis (0993T) complements calcium scoring by assessing perivascular adipose tissue phenotype. |
93799 | Unlisted cardiovascular service or procedure | Used rarely when a specific analysis or reporting service does not have an explicit CPT entry; historically investigators may consider unlisted codes when reporting nonstandard analyses, but 0993T is the designated add-on for PVAT risk assessment. |
93000 | Electrocardiogram, routine ECG with at least 12 leads; with interpretation and report | ECG is frequently performed as part of pre-imaging cardiac evaluation; it is not billed as part of the PVAT analysis but commonly occurs in the same clinical workflow. |
0074T | Image-guided radiologic supervision and interpretation of coronary computed tomographic angiography-derived fractional flow reserve (FFR-CT) | Represents another advanced post-processing, physiologic assessment derived from CCTA datasets; relates as an alternative or complementary software-based analysis to PVAT assessment. |