Summary & Overview
CPT 74328: Imaging Supervision and Interpretation for Endoscopic Biliary Duct Catheterization
CPT code 74328 documents the imaging supervision and interpretation component of an endoscopic biliary duct catheterization, where fluoroscopic X-ray and contrast are used to visualize the biliary tree during endoscope-guided catheter insertion. Nationally, accurate reporting of this imaging-only code matters for separating the professional interpretation component from the endoscopic procedure itself, supporting correct clinical documentation and payer adjudication. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will gain a concise overview of what CPT 74328 represents clinically and operationally, how common payers treat imaging-only reporting, and what benchmarks and policy contexts typically affect utilization and reimbursement. The publication describes the clinical context of biliary duct fluoroscopy, the appropriate site-of-service expectations (hospital outpatient departments and ambulatory surgery centers), and practical implications for claims reporting. Data not available in the input is noted where applicable. This summary equips billing managers, coding professionals, and policy analysts with the essentials to recognize when CPT 74328 is the correct code to report and what topics to investigate further with specific payers.
Billing Code Overview
CPT code 74328 represents imaging supervision and interpretation (S&I) for an endoscopic biliary duct catheterization. The procedure involves fluoroscopic X-ray visualization of the biliary ducts during endoscope-guided catheter insertion, with administration of contrast 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 biliary duct catheterization.
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Service type: Imaging supervision and interpretation for endoscopic biliary duct catheterization
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Typical site of service: Hospital outpatient department or ambulatory surgery center where endoscopic retrograde procedures with fluoroscopy are performed
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient presents with obstructive jaundice, right upper quadrant pain, and abnormal liver function tests suggesting biliary obstruction. The gastroenterologist schedules an endoscopic retrograde cholangiopancreatography (ERCP) with endoscopic biliary duct catheterization. During the procedure, the endoscopist cannulates the common bile duct, injects iodinated contrast, and obtains real-time fluoroscopic images to evaluate for choledocholithiasis, strictures, or neoplasm. A radiologist or the endoscopist documents supervision and interpretation of the fluoroscopic imaging as a separately reportable service using 74328. The clinical workflow includes pre-procedure consent and review of indications, intra-procedure fluoroscopic imaging with contrast administration and image acquisition, interpretation of findings, and generation of a fluoroscopy report. Images are archived to the PACS and the imaging interpretation is included in the patient record. Billing for 74328 represents only the imaging supervision and interpretation component, distinct from the endoscopic or therapeutic components of the ERCP.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When reporting only the physician interpretation of the fluoroscopic images separate from technical services |