Summary & Overview
CPT 50430: Percutaneous Ureterogram/Nephrostogram Diagnostic Study
CPT code 50430 represents a percutaneous diagnostic radiologic procedure in which a provider establishes a new access route and injects contrast into the ureter(s) or renal collecting system to perform a ureterogram or nephrostogram. Nationally, this code captures targeted imaging used to assess nephrostomy or pyelostomy tube function, identify ureteropelvic junction obstruction, and detect urine leakage—procedures that inform critical decisions about drainage, stent placement, and further intervention.
Key payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for use of the code, typical sites of service, and how the procedure is documented. The publication summarizes common billing modifiers encountered with this service and highlights typical denials and coverage considerations seen across major commercial payers and Medicare. It also outlines relevant coding relationships and service-line placement to aid billing and revenue-cycle teams.
This briefing is written for a national audience of clinicians, coding professionals, and policy analysts seeking a clear, operational understanding of CPT code 50430, its clinical purpose, and the payer environment that governs coverage and reimbursement.
Billing Code Overview
CPT code 50430 describes a percutaneous contrast study of the urinary collecting system in which the provider creates a new access route and injects contrast into the ureter(s) (ureterogram) or kidney (nephrostogram) for diagnostic imaging. The procedure evaluates internal structures of the kidney, renal pelvis, and ureters and typically assesses nephrostomy or pyelostomy tube function, identifies ureteropelvic junction obstruction, or detects urine leakage around a tube insertion site.
Service type: Percutaneous diagnostic radiologic procedure with contrast injection (ureterogram/nephrostogram)
Typical site of service: Interventional radiology suite, hospital outpatient department, or ambulatory surgical center where percutaneous access and imaging guidance are available
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a long-standing indwelling percutaneous nephrostomy tube presents with decreased drainage and flank discomfort. The provider schedules a percutaneous nephrostogram/ureterogram to evaluate nephrostomy tube patency and to identify possible obstruction at the ureteropelvic junction or extravasation of urine around the tube tract. The procedure is performed in an interventional radiology suite under conscious sedation. After sterile preparation and local anesthesia at the existing tube site, the provider creates or accesses a percutaneous route and injects iodinated contrast into the renal collecting system under fluoroscopic guidance. Images are obtained to assess the renal pelvis, calyces, and ureter; any obstruction, filling defect, leak, or malposition of the tube is documented. The provider interprets the radiologic findings, provides procedural documentation including contrast volume and radiation exposure, and communicates results to the referring urologist. Typical workflow includes pre-procedure verification, IV access, sedation monitoring, imaging acquisition, post-procedure observation, and discharge instructions regarding tube care and signs of complication.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation component separate from technical services performed by the facility or radiology group. |