HCPCS Level II code C7513 denotes a complex image-guided vascular procedure for dialysis circuits that combines introduction of needles or catheters, diagnostic angiography of the entire dialysis circuit, and transluminal balloon angioplasty of a central dialysis segment performed through the dialysis circuit. This code captures the bundled technical and professional activities including contrast injections, fluoroscopic guidance, comprehensive imaging from the arterial anastomosis to the central venous outflow, and radiological documentation and interpretation. Nationally, the code matters because it corresponds to high-acuity interventional radiology services critical to maintaining or restoring dialysis access patency and often carries significant resource, facility, and imaging intensity implications. Key payers addressed in this publication include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical and procedural context for C7513, the typical sites of service, commonly used modifiers, and payer coverage considerations. The publication also summarizes benchmarks and policy-relevant points affecting reimbursement and coding compliance for image-guided dialysis circuit interventions, and highlights documentation elements and service components that commonly drive payer review and payment decisions.