Summary & Overview
CPT 0944T: 3D Simulation for Liver Lesion Microwave Ablation
CPT code 0944T represents an advanced imaging-based planning service that creates a 3D simulation for microwave ablation of one or more liver lesions. The service models lesion and surrounding tissue, calculates planned ablation volumes, overlays the plan on CT images, and compares volumes before and after the procedure to document treatment effectiveness. This code matters nationally as image-guided ablation and image-based planning become more common in interventional oncology, affecting coding, coverage, and payment for hospitals and ambulatory surgery centers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn the clinical context for use of the code, typical sites of service, and what to expect in payer coverage patterns and billing workflows. The summary synthesizes benchmarks where available and highlights policy considerations such as documentation of simulation steps and imaging integration into the operative record.
The publication provides a concise reference for coding teams, interventional radiologists, and revenue cycle staff: it outlines the service components captured by 0944T, summarizes common payer approaches to advanced imaging and simulation services, and identifies practical documentation elements needed to support billing. Data not available in the input.
Billing Code Overview
CPT code 0944T describes an advanced preprocedural 3D simulation and treatment-planning service for microwave ablation of liver lesions. The provider uses specialized software to create a three-dimensional model of one or more liver lesions and surrounding hepatic tissue, calculate the volume of tissue planned for ablation, overlay the ablation plan onto CT images, and compare pre- and post-procedure ablation volumes to assess treatment completeness.
Service type: Imaging-based procedural planning / treatment simulation
Typical site of service: Hospital outpatient department, ambulatory surgery center, or interventional radiology suite where image-guided liver ablation procedures are performed
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a history of colorectal cancer presents with a solitary 2.8 cm metastatic lesion in the right hepatic lobe identified on contrast-enhanced CT. The multidisciplinary tumor board elects percutaneous microwave ablation to treat the lesion because the patient is not a surgical candidate due to comorbid cardiopulmonary disease. The interventional radiology team obtains pre-procedure CT images and uploads the datasets into advanced ablation-planning software. The provider segments the lesion and adjacent hepatic anatomy, simulates one or more ablation probes and energy settings in 3D, calculates predicted ablation volumes, and overlays the planned ablation onto the patient’s CT images to confirm target coverage while preserving critical structures. The planned simulation is used to guide probe placement in the interventional suite under CT or ultrasound guidance. Post-ablation, follow-up CT images are acquired; the software compares pre- and post-ablation volumes to document adequate treatment margin and to confirm the absence of residual enhancing tumor. Typical site of service: hospital outpatient interventional radiology suite or ambulatory surgical center. Service type: advanced image-based pre- and post-procedural 3D ablation planning and volumetric analysis supporting percutaneous microwave ablation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when documentation supports substantially greater work or complexity for the planning simulation beyond typical expectations (rare). |
26 | Professional component | Use when only the physician’s professional interpretation/planning component is billed separate from facility or technical services. |
52 | Reduced services | Use when the planning service was partially performed or limited compared with full simulation (e.g., incomplete dataset). |
53 | Discontinued procedure | Use if the planning process was initiated but terminated due to patient factors or non-diagnostic imaging. |
78 | Unplanned return to the operating/procedure room by the same physician following initial procedure | Use if repeat intra-procedural planning/simulation is required because of complication requiring return to suite during same encounter. |
80 | Assistant surgeon | Use when an assistant surgeon participated and billing requires reporting of assistant involvement for the professional component. |
82 | Assistant surgeon (when qualified resident not available) | Use when an assistant surgeon is needed and resident coverage is absent. |
AS | Accredited surgical facility | Use to denote services performed in an ambulatory surgical center when required by payer. |
TC | Technical component | Use when billing only the technical component (software, image processing) separate from the physician interpretation. |
TG | Monitored anesthesia care (MAC) by CRNA | Use when reporting services in payers that require modality-specific anesthesia modifier reporting for the encounter (if applicable). |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207P00000X | Interventional Radiology | Primary specialty performing percutaneous ablation planning and procedures. |
| 207K00000X | Diagnostic Radiology | Radiologists who perform image acquisition and interpretation for planning. |
| 208000000X | General Surgery | Surgeons who may participate in multidisciplinary planning for hepatic ablation. |
| 363A00000X | Nurse Practitioner | NPs involved in pre- and post-procedure coordination and documentation. |
| 207X00000X | Vascular & Interventional Radiology | Alternate taxonomy for interventional specialists performing ablation planning. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
C78.7 | Secondary malignant neoplasm of liver and intrahepatic bile duct | Metastatic liver lesions commonly treated with percutaneous microwave ablation; primary indication for simulation planning. |
C22.0 | Liver cell carcinoma | Primary hepatocellular carcinoma may be treated with ablation when surgery is not an option. |
K76.9 | Liver disease, unspecified | General hepatic pathology context when specific etiology is under evaluation and ablation planning is considered. |
Z90.79 | Acquired absence of other organ (partial hepatectomy) | Prior hepatic surgery affecting anatomy and influencing ablation planning and volumetric analysis. |
D37.0 | Neoplasm of uncertain behavior of liver and intrahepatic bile ducts | Lesions of uncertain malignant potential that may undergo image-guided ablation with careful planning. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
47120 | Hepatectomy, resection of liver, wedge resection or segmental resection | Surgical alternative to percutaneous ablation; considered in multidisciplinary planning when resection is feasible. |
47382 | Ablation, open, hepatic, radiofrequency or microwave, single lesion | A procedural code for hepatic ablation performed via open surgical approach; related by treatment intent. |
47383 | Ablation, percutaneous, hepatic, radiofrequency or microwave, single lesion | Percutaneous ablation procedure that the 3D planning simulation supports; often performed immediately after planning. |
71250 | CT, thorax; without contrast material, with contrast, or both (for staging) | CT imaging for staging and guidance; source images used by planning software. |
74177 | CT abdomen and pelvis with contrast | Diagnostic and procedural guidance CT; provides datasets for 3D simulation and post-ablation comparison. |
76377 | 3D rendering with interpretation and reporting of CT/MRI images when performed separately | Related imaging service for complex 3D rendering and volumetric comparison; may be reported when distinct from the planning service per carrier rules. |