Summary & Overview
CPT 47550: Intraoperative Biliary Endoscopy (Choledochoscopy)
CPT code 47550 denotes intraoperative insertion of a biliary endoscope (choledochoscope) into the biliary ducts during gallbladder surgery to detect obstructions or other abnormalities. Nationally, this code captures a targeted diagnostic step during cholecystectomy and related biliary procedures that can influence immediate surgical decision-making, guide stone extraction, and affect downstream care.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context for when this diagnostic endoscopy is performed, typical sites of service, and common operative scenarios in which the code is used.
The publication summarizes benchmarks and utilization patterns where available, highlights payer coverage considerations and coding practice implications, and outlines clinical context relevant to surgeons and coding professionals. Data not available in the input will be noted as such. The goal is to provide a concise reference for clinicians, coding staff, and policy analysts seeking a national-level understanding of CPT code 47550 and its role in biliary surgery workflows.
Billing Code Overview
CPT code 47550 describes insertion of a biliary endoscope (choledochoscope) into the ducts of the biliary system during gallbladder surgery to identify abnormalities or blockages. This procedure is performed intraoperatively as part of a surgical exploration of the biliary tract.
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Service type: Intraoperative diagnostic endoscopy of the biliary ducts performed during cholecystectomy or related biliary surgery
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Typical site of service: Hospital operating room or ambulatory surgery center during gallbladder or biliary tract surgery
Clinical & Coding Specifications
Clinical Context
A 52-year-old female presents with symptomatic cholelithiasis and episodic right upper quadrant pain with suspected choledocholithiasis based on abnormal liver function tests and a dilated common bile duct on abdominal ultrasound. The patient is scheduled for an open or laparoscopic cholecystectomy. During the operation, the surgeon inserts a biliary endoscope (choledochoscope) into the cystic duct or common bile duct to visualize the biliary tree, identify retained stones, inspect for strictures or mucosal abnormalities, and assist with stone extraction or ductal clearance. Intraoperative workflow includes preoperative consent for possible common bile duct exploration, anesthesia induction, surgical exposure of the gallbladder and cystic duct, intraoperative choledochoscopy (47550) for direct visualization, potential retrieval of stones with baskets or irrigation, and placement of a T-tube or primary duct closure if indicated. Postoperative care involves monitoring liver enzymes, bilious drainage if a tube was placed, and follow-up imaging or labs as needed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when intraoperative choledochoscopy required substantially greater work due to extensive adhesiolysis or complex stone extraction beyond typical effort. |