Summary & Overview
CPT 47531: Percutaneous Cholangiography Injection, Image-Guided
Headline: CPT code 47531 Enables Image-Guided Percutaneous Cholangiography
Lead: CPT code 47531 identifies the image-guided injection of contrast into the bile ducts via an existing percutaneous access route using ultrasound and/or fluoroscopy guidance. The code captures a focused radiologic service that supports diagnosis and management of biliary pathology.
CPT code 47531 represents a targeted, image-guided diagnostic intervention used to visualize the biliary tree when contrast injection through an established percutaneous tract is required. This service is performed under ultrasound and/or fluoroscopic guidance to ensure accurate delivery of contrast and minimize complication risk. Nationally, the code matters because it defines billing and clinical documentation standards for a common interventional radiology procedure used in diagnosing biliary obstruction, leak, and postoperative evaluation.
Key payers covered in typical analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what the code represents, typical sites of service, and the clinical context in which it is used. The publication provides benchmarks and payer coverage considerations, notes on billing practice and code-specific documentation expectations, and pointers to related procedural coding used in biliary imaging when available.
This summary serves clinicians, coding professionals, and policy analysts seeking a national-level understanding of CPT code 47531 and its role in biliary imaging workflows.
Billing Code Overview
CPT code 47531 describes a radiologically guided cholangiography injection through an existing percutaneous route. In this procedure, the provider injects contrast into the biliary tree via a previously established skin tract while using ultrasound and/or fluoroscopy displayed on a video screen to guide the injection and confirm ductal anatomy.
Service type: Image-guided diagnostic injection (cholangiography) via existing percutaneous access
Typical site of service: Interventional radiology suite, radiology department, or hospital outpatient setting, where ultrasound and fluoroscopic imaging are available.
Clinical & Coding Specifications
Clinical Context
A 64-year-old patient with prior percutaneous transhepatic biliary drainage presents with persistent cholestatic liver enzyme elevation and episodic right upper quadrant pain. The interventional radiology team schedules a percutaneous cholangiographic injection through the existing skin tract to opacify the biliary tree and evaluate for ductal obstruction or dislodgement of the drainage catheter. Under conscious sedation in the angiography suite or interventional radiology procedure room, ultrasound and/or fluoroscopy are used to localize the existing percutaneous access, advance contrast through the catheter or tract, and obtain live radiographic imaging of intrahepatic and extrahepatic bile ducts. Procedural steps include verification of the mature percutaneous route, sterile preparation, injection of iodinated contrast under fluoroscopic and/or ultrasound guidance, image capture for diagnostic interpretation, and monitoring for immediate complications (contrast extravasation, bleeding, or cholangitis). Typical site of service is the hospital-based interventional radiology suite or ambulatory surgery center equipped with fluoroscopy and ultrasound. Typical service type is image-guided diagnostic injection for cholangiography using an established percutaneous route.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the physician interpretation of imaging if technical component billed separately. |