Summary & Overview
CPT 47556: Choledochoscopy with Biliary Dilation and Stent Placement
Headline: CPT code 47556 defines choledochoscopic dilation with stent placement through an existing transabdominal biliary tube. Lead: CPT code 47556 captures a targeted biliary endoscopic procedure in which a choledochoscope is passed through an existing abdominal tube to visualize the bile ducts, dilate a stenotic segment, and place a stent to preserve ductal flow. This intervention addresses obstructive biliary pathology and is relevant for hospitals and interventional endoscopy programs.
CPT code 47556 matters nationally because it documents a specialized, image-guided biliary procedure used to relieve or prevent biliary obstruction. It is frequently performed in hospital-based procedural suites and has implications for facility resource use, device supply management, and procedural coding accuracy. Key payers considered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn what the code represents clinically and operationally, which payers are commonly engaged, and what to expect in terms of service setting and clinical context. The publication provides benchmarks and policy-relevant context where available, summarizes typical clinical indications, and outlines documentation and coding elements that influence coverage and payment. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 47556 describes a choledochoscopy with dilation and stent placement via an existing transabdominal tube. In this procedure a choledochoscope (a tubular biliary endoscope with a light source and camera) is introduced through an existing tube in the abdominal wall — placed in association with another procedure — to visualize the biliary ducts, dilate a narrowed segment, and leave a stent in place to maintain ductal patency.
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Service type: Biliary endoscopic intervention (choledochoscopy) involving ductal dilation and stent placement
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Typical site of service: Performed in operative or procedural settings where access to an existing transabdominal biliary tube is available, commonly in hospital operating rooms or interventional endoscopy suites
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a history of cholangitis and prior hepaticojejunostomy presents with recurrent right upper quadrant pain, abnormal liver function tests (cholestatic pattern), and imaging suggesting intrahepatic biliary ductal dilation and a localized stricture. The patient has an indwelling external biliary drain (placed at a prior percutaneous transhepatic biliary drainage procedure) that requires internal assessment and definitive management of a narrowed segment. In the operating/interventional suite, the interventional gastroenterologist or interventional radiologist introduces a choledochoscope through the existing external biliary tube tract to directly visualize the biliary tree, perform balloon dilation of the identified stricture, and place an internal biliary stent to maintain patency. The workflow includes pre-procedure imaging review, informed consent, conscious sedation or monitored anesthesia care, sterile access via the established abdominal wall tube tract, choledochoscopic inspection, dilation of the narrowed duct segment, stent deployment, confirmation of flow, and post-procedure monitoring with follow-up imaging and drain management as needed. Typical site of service is an outpatient interventional radiology or ambulatory surgical/endoscopy unit, or inpatient procedure suite when the patient is admitted.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Office or other outpatient visit for evaluation and management | Use when the procedure is performed in an outpatient setting as the primary service. |