CPT code 93990 denotes a duplex ultrasound assessment of blood flow through a hemodialysis graft. This diagnostic vascular ultrasound procedure is used to evaluate graft patency and detect stenosis or other flow-limiting abnormalities that can compromise dialysis access. Nationally, such imaging plays a central role in maintaining functional vascular access for patients receiving hemodialysis and can influence care pathways and downstream interventions.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical purpose, typical sites of service, and the clinical context in which the procedure is ordered. The publication highlights common modifiers associated with billing practices, discusses how the code fits into vascular access management workflows, and outlines the policy landscape and benchmark considerations that affect coverage and reimbursement. Where specific input fields were not provided, the report notes that data are not available in the input.

This piece is written for a national audience of clinicians, billing professionals, and policy analysts seeking a clear summary of the code’s clinical use, payer relevance, and the types of operational and policy issues that commonly arise around diagnostic evaluation of hemodialysis grafts.