Summary & Overview
HCPCS G0183: Quantitative Cardiac CT Volume and LV Mass Analysis
HCPCS Level II code G0183 designates quantitative post-processing of chest/cardiac CT data to measure cardiac volumes, chamber sizes, and left ventricular wall mass. These derived metrics support clinical assessment of cardiac structure and function and increasingly inform care planning, device therapy decisions, and longitudinal follow-up. Nationally, standardized reporting of quantitative cardiac CT results is growing in relevance as imaging platforms and automated software tools expand.
Key payers in scope include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what G0183 represents, typical sites of service, and the clinical context for using quantitative CT-derived cardiac measurements. The publication outlines common reimbursement and billing considerations, payer coverage patterns where available, and how the code fits into imaging service lines and hospital outpatient radiology workflows.
This summary prepares clinicians, billing staff, and policy specialists to identify where G0183 applies in practice, understand which payers commonly adjudicate such claims, and expect discussion of benchmarking and policy updates in the full publication. Data not available in the input will be noted in relevant sections.
Billing Code Overview
HCPCS Level II code G0183 describes quantitative software measurements of cardiac volume, cardiac chambers volumes and left ventricular wall mass derived from CT scan(s) data of the chest/heart (with or without contrast). This service represents post-processing analysis that converts chest or cardiac CT imaging data into measurable cardiac chamber volumes and left ventricular wall mass values used for clinical assessment and reporting.
Service type: Image post-processing / quantitative cardiac CT analysis
Typical site of service: Hospital outpatient imaging departments, radiology centers, and advanced imaging facilities where CT chest/heart studies are performed and processed
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with a history of hypertension, hyperlipidemia, and prior myocardial infarction is referred by his cardiologist for advanced cardiac structural assessment after progressive exertional dyspnea and an abnormal transthoracic echocardiogram showing borderline left ventricular hypertrophy and reduced ejection fraction. The patient presents to an outpatient radiology or cardiology imaging center for a cardiac CT study. The CT is performed with or without iodinated contrast depending on renal function and clinical indication. Quantitative post-processing software is used to derive cardiac volumes, individual chamber volumes, and left ventricular wall mass from the acquired CT dataset. The clinical workflow includes: pre-scan screening and consent, review of prior imaging and laboratory renal function, CT acquisition (ECG-gated cardiac CT or chest CT including the heart), image transfer to a dedicated workstation, automated and/or semi-automated segmentation of cardiac chambers and myocardium, manual quality control and adjustments by a trained analyst or physician, generation of quantitative metrics (end-diastolic and end-systolic volumes, stroke volume, ejection fraction, chamber volumes, LV mass), and reporting of results to the referring cardiologist for management decisions such as medical therapy adjustment, device consideration, or surgical planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier required for default reporting | Use when no specific modifier applies to the service. |