Summary & Overview
HCPCS C7548: Exchange Nephrostomy Catheter with Ureteral Balloon Dilation
HCPCS Level II code C7548 denotes an image-guided exchange of a percutaneous nephrostomy catheter performed with ureteral stricture balloon dilation, and includes any diagnostic nephrostogram and/or ureterogram plus radiological supervision and interpretation. This procedure code captures a complex, often inpatient-or-outpatient interventional radiology service that addresses obstructive uropathy and ureteral strictures while maintaining or re-establishing urinary drainage. Nationally, accurate coding of C7548 matters for appropriate clinical documentation, facility billing, and consistent capture of image-guided urologic interventions.
Key payers considered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The content summarizes what providers and billing teams need to know about the code’s clinical scope and expected sites of service. Readers will find benchmarks for common utilization settings, clarification of the service components bundled into the code (catheter exchange, balloon dilation, diagnostic imaging, imaging guidance, and interpretation), and context on where this procedure typically occurs clinically. The narrative also outlines typical modifiers used for complex interventional services where applicable and notes when data elements were not provided in the source input. This piece is intended for a national audience of clinicians, coding professionals, and policy analysts seeking a concise reference to the clinical and billing contours of C7548.
Billing Code Overview
HCPCS Level II code C7548 describes an exchange of a percutaneous nephrostomy catheter performed with ureteral stricture balloon dilation, and includes any diagnostic nephrostogram and/or ureterogram when performed, as well as imaging guidance (for example, ultrasound and/or fluoroscopy) and all associated radiological supervision and interpretation.
Service type: Image-guided interventional radiology procedure involving nephrostomy catheter exchange with concurrent ureteral dilation and diagnostic contrast imaging.
Typical site of service: Hospital outpatient radiology or interventional suite, ambulatory surgical center, or hospital inpatient radiology/interventional department depending on clinical setting.
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a history of recurrent ureteral stricture and hydronephrosis presents with flank pain, decreased urinary output, and rising serum creatinine. Imaging (renal ultrasound and non-contrast CT) demonstrates unilateral hydronephrosis with suspected ureteral obstruction at the pelvic ureter. The interventional radiology team schedules a percutaneous nephrostomy catheter exchange with balloon dilation of the ureteral stricture under image guidance.
Procedure workflow: the patient is brought to the IR suite, reviewed for anticoagulation and allergies, and given conscious sedation or monitored anesthesia care per institutional protocols. Under ultrasound and fluoroscopic guidance, the existing nephrostomy catheter tract is accessed, a diagnostic nephrostogram and/or ureterogram is performed to delineate the stricture, and a guidewire is advanced across the narrowed segment when feasible. A ureteral dilation balloon is positioned across the stricture and inflated to disrupt and widen the lumen. The nephrostomy catheter is exchanged over wire for a new catheter of appropriate caliber. Fluoroscopic imaging and contrast studies confirm catheter position and improved drainage. The procedure includes radiological supervision and interpretation. Typical recovery includes short observation, assessment of urine output and pain control, and discharge with catheter care instructions or admission if complications or comorbidities require it.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |