Summary & Overview
CPT 74330: Imaging Supervision and Interpretation for Endoscopic Duct Catheterization
CPT code 74330 denotes the imaging supervision and interpretation portion of an endoscopic duct catheterization, a fluoroscopic procedure used to visualize the bile and pancreatic ducts after contrast administration. Nationally, this code matters because it isolates the radiologic component from the procedural elements, enabling separate reporting and payment for the diagnostic imaging and interpretation that guide management of ductal tumors, strictures, stones, and other abnormalities. Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what CPT code 74330 covers, the clinical context in which it is used, and what to expect for sites of service where this imaging component is typically delivered. The publication provides benchmarks and documentation expectations relevant to the imaging interpretation role, summarizes common modifiers seen with imaging supervision codes, and outlines policy and billing considerations that affect national reimbursement and coding consistency. Data not available in the input is identified where applicable.
Billing Code Overview
CPT code 74330 represents imaging supervision and interpretation for a separately reportable endoscopic duct catheterization. In this procedure, the provider performs fluoroscopic imaging while an endoscope is used to access the bile and pancreatic ducts, administers contrast material, and interprets X‑ray views to evaluate for tumors, strictures, stones, or other abnormalities. This code is reported to represent only the imaging supervision and interpretation component of the endoscopic duct catheterization procedure.
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Service type: Imaging supervision and interpretation for endoscopic duct catheterization
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Typical site of service: Hospital radiology or endoscopy suite, ambulatory surgery center, or other facility where fluoroscopic endoscopic duct procedures are performed
Clinical & Coding Specifications
Clinical Context
A 62-year-old male with a history of choledocholithiasis and intermittent right upper quadrant pain presents with jaundice and elevated liver enzymes. After an initial ultrasound and CT suggesting a common bile duct stone and possible biliary stricture, the gastroenterology team schedules an endoscopic retrograde cholangiopancreatography (ERCP) with selective cannulation of the bile and pancreatic ducts to diagnose and treat obstructing lesions. During the procedure, the endoscopist advances an endoscope into the duodenum, cannulates the ampulla, and inserts a duct catheter. The imaging physician (radiologist or fluoroscopy-certified endoscopist) provides real-time fluoroscopic supervision and interprets the ductograms while contrast is injected to delineate ductal anatomy, identify stones, strictures, or filling defects, and guide therapeutic maneuvers performed by the endoscopist. The service represented by 74330 is billed for the imaging supervision and interpretation component only when the duct catheterization is a separately reportable endoscopic procedure.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation/component of imaging if the technical component is billed separately. |