Summary & Overview

CPT 74363: Imaging Supervision and Interpretation for Biliary Duct Dilation

Headline: CPT code 74363: Imaging Supervision and Interpretation for Biliary Duct Dilation

Lead: CPT code 74363 denotes the imaging supervision and interpretation component of fluoroscopically guided biliary duct dilation, a targeted procedure used when strictures or obstructive abnormalities are identified in the biliary tract. The code captures the physician’s role in administering contrast, interpreting fluoroscopic images, and guiding balloon dilation and potential stent placement.

Why it matters: Nationally, accurate capture of CPT code 74363 is important for distinguishing imaging professional work from the technical and procedural components of biliary interventions. Proper use affects clinical documentation, billing clarity, and payment allocation for complex biliary procedures that frequently occur in hospitals and interventional suites.

Payers covered: This analysis addresses major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

What readers will learn: The publication explains the clinical context and service setting for CPT code 74363, clarifies the code’s scope as supervision and interpretation only, and provides benchmarking and policy context where available. Readers will find summaries of payer coverage approaches, documentation expectations, and common coding interactions relevant to interventional biliary procedures. Data not available in the input will be noted as such.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 74363biliary duct dilationfluoroscopyinterventional radiologyendoscopyimaging supervisionbilling guidanceprocedural codingphysician interpretation

Billing Code Overview

CPT code 74363 describes imaging supervision and interpretation for biliary duct dilation performed during placement of a catheter or endoscope into the bile ducts. The provider administers contrast and uses fluoroscopic X‑ray imaging to visualize the biliary tract, identify strictures or other abnormalities, and guide dilation of a stricture with a balloon and possible biliary stent placement. This code represents only the supervision and interpretation component of that imaging procedure.

Service Type

Imaging supervision and interpretation during biliary duct intervention

Typical Site of Service

Hospital operating room or interventional radiology suite; may also occur in an endoscopy suite where fluoroscopic biliary interventions are performed.

Clinical & Coding Specifications

Clinical Context

A 62-year-old patient with a history of cholestatic liver disease presents with progressive jaundice, right upper quadrant pain, and abnormal liver function tests suggesting obstructive cholestasis. Cross-sectional imaging (ultrasound/CT/MRCP) demonstrates intrahepatic biliary dilation and a likely stenotic segment of the common hepatic duct. The gastroenterology or interventional radiology team schedules an endoscopic retrograde cholangiopancreatography (ERCP) with planned biliary duct dilation and possible stent placement. During the procedure, the imaging physician provides fluoroscopic supervision and interpretation while contrast is injected via an endoscope or catheter to outline the biliary tree. Fluoroscopic images identify a focal biliary stricture; balloon dilation is performed and a biliary stent may be deployed by the therapeutic team. The imaging physician documents real-time fluoroscopic findings, image acquisition times, and interpretation. Billing uses 74363 to report only the imaging supervision and interpretation portion of the biliary duct dilation procedure when that component is separately reportable. Typical site of service: hospital outpatient or ambulatory surgical center where ERCP with fluoroscopy is performed. Service type: fluoroscopic imaging supervision and interpretation for therapeutic biliary duct dilation.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the physician interpretation component separate from technical services provided by facility or equipment owner.
`TC`	Technical component	Use when billing only the technical portion (equipment, technologist) of the imaging service.
`59`	Distinct procedural service	Not listed in raw modifiers; Data not available in the input.
`52`	Reduced services	Use when the procedure is partially reduced or not completed as planned (e.g., limited fluoroscopy time due to patient intolerance).
`53`	Discontinued procedure	Use if the procedure is started but terminated for patient safety reasons before completion.
`78`	Unplanned return to operating room for related procedure by same physician	Use when patient returns intraoperatively or immediately post-procedure for a related biliary intervention.
`79`	unrelated procedure or service by the same physician during the postoperative period	Not listed in raw modifiers; Data not available in the input.
`62`	Two surgeons/share procedure	Use rarely when two surgeons of different specialties share operative responsibility for biliary therapy.
`80`	Assistant surgeon	Use when an assistant surgeon is required and documented; some payors do not allow for endoscopic procedures.
`AS`	Physician assistant or nurse practitioner service	Use to indicate services personally performed by an assistant practitioner where supported by payor policy.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures	Included in list for completeness when anesthesia medical direction is provided for sedated ERCP.
`QX`	CRNA service with medical direction by anesthesiologist	Use when CRNA provides anesthesia under medical direction during the procedure.
`QY`	Medical direction of one CRNA by an anesthesiologist	Use when applicable to the anesthesia service provided during the procedure.
`62`	Two surgeons/share procedure	Use when two surgeons share the procedure (duplicate entry retained once).

Taxonomy Code	Specialty	Notes
207L00000X	Gastroenterology	Most common specialty performing ERCP with biliary dilation and stent placement.
174W00000X	Interventional Radiology	Performs percutaneous biliary interventions and fluoroscopic guidance for biliary dilation/stenting when ERCP is not possible.
207XS0101X	Advanced Heart Failure and Transplant Cardiology	Not applicable; Data not available in the input.
2086S0125X	General Surgery	Surgeons who perform biliary interventions in operative settings may be involved.
208D00000X	Diagnostic Radiology	May provide fluoroscopic supervision and interpretation for biliary procedures.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K83.1`	Obstruction of bile duct	Direct indication for biliary duct imaging, dilation, and possible stent placement to relieve obstruction.
`K83.0`	Cholestasis	Clinical syndrome often due to biliary obstruction; fluoroscopic biliary imaging and intervention address the mechanical cause.
`K80.00`	Calculus of gallbladder with acute cholecystitis without obstruction	Gallstones can migrate and obstruct bile ducts; ERCP with dilation may be required when stones cause strictures or obstruction.
`K83.8`	Other specified diseases of biliary tract	Includes strictures or inflammatory conditions that may require biliary dilation and stenting.
`C24.0`	Malignant neoplasm of extrahepatic bile ducts	Malignant strictures often present with biliary obstruction; palliative dilation and stent placement are common.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`43260`	Endoscopic retrograde cholangiopancreatography, diagnostic, with or without collection of specimen(s) by brushing or biopsy	ERCP diagnostic component commonly performed prior to therapeutic dilation; diagnostic cholangiography helps localize strictures.
`43263`	Endoscopic retrograde cholangiopancreatography; with sphincterotomy and/or other endoscopic therapeutic procedures	Therapeutic ERCP codes used when sphincterotomy or other endoscopic therapies accompany dilation/stent placement.
`47562`	Laparoscopy, surgical; cholecystectomy with cholangiography	In surgical settings, intraoperative cholangiography may identify biliary obstruction leading to subsequent dilation/stent planning.
`43460`	Data not available in the input	Data not available in the input.
`74475`	Radiologic percutaneous transhepatic cholangiography, including flushes, imaging and radiologic supervision and interpretation	Percutaneous transhepatic cholangiography (PTC) is an alternative imaging approach for biliary access and dilation when ERCP is not feasible.