Summary & Overview
CPT 50437: Percutaneous Nephrostomy Tract Dilation with New Tract Creation
CPT code 50437 covers dilation of an existing percutaneous nephrostomy tract with concurrent creation of a new tract to the renal collecting system, and may include placement of a tube to keep the tract open. This procedure is typically performed by interventional radiology teams using imaging guidance; radiologic supervision and interpretation are included in the service. Nationally, this code represents an important component of care for patients requiring percutaneous renal drainage or access for stone disease, obstruction, or other urologic interventions.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service settings, typical sites of care, and which payers commonly reimburse for this interventional radiology service. The publication also provides benchmarking information, expected utilization patterns, and any relevant policy or coverage considerations that affect nationwide billing and payment practices.
This summary is intended for clinicians, billing professionals, and policy analysts seeking a clear national perspective on procedural definition, payer coverage landscape, and the practical contexts in which CPT code 50437 is used.
Billing Code Overview
CPT code 50437 describes the dilation of an existing percutaneous nephrostomy tract with the creation of a new tract between the skin and the renal collecting system (renal pelvis). The procedure may include placement of a tube to maintain patency of the tract. Imaging guidance and radiologic supervision and interpretation are included when performed.
Service type: Interventional radiology procedure involving percutaneous renal access and tract dilation
Typical site of service: Hospital outpatient department, ambulatory surgical center, or interventional radiology suite
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with obstructive hydronephrosis from a ureteral stricture presents with fever, flank pain, and rising creatinine despite attempted ureteral stent placement. The interventional radiology team evaluates the patient and plans percutaneous renal access. Under conscious sedation and ultrasound/fluoroscopic guidance, the operator dilates an existing percutaneous nephrostomy tract to re-establish drainage and then creates an additional new percutaneous nephrostomy tract into the renal collecting system on the contralateral calyx for improved decompression. The procedure includes radiologic supervision and interpretation and may leave one or more nephrostomy tubes in place for ongoing drainage. Post‑procedure workflow includes recovery room monitoring, documentation of procedural details (site, laterality, tube size, contrast use, complications), orders for tube care and antibiotics if indicated, and communication with the referring urologist and primary team for ongoing management and follow‑up imaging.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
59 | Distinct procedural service | Use when a separate and independent procedure is performed through a different tract or anatomical site from another billed service. |
62 |