Summary & Overview
CPT 93931: Upper Extremity Arterial Duplex, Unilateral
CPT code 93931 denotes a unilateral duplex ultrasound of the upper extremity arteries or bypass grafts — a noninvasive vascular imaging test used to measure blood flow and identify arterial stenosis or occlusion in one arm. This procedure is commonly performed in outpatient vascular labs, hospital outpatient departments, and ambulatory imaging centers and is an important diagnostic tool for patients with suspected upper extremity arterial disease, thrombotic complications of bypass grafts, or embolic symptoms.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of service definitions, typical sites of service, and the clinical context in which 93931 is used. The publication summarizes standard billing considerations and common modifiers provided in the input, and outlines where this service sits within vascular diagnostic care pathways.
This national summary is intended to help billing managers, vascular lab directors, and policy analysts understand what CPT code 93931 represents, how it is applied clinically, and which payers typically reimburse for unilateral upper extremity arterial duplex exams. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 93931 describes a duplex ultrasound scan of the upper extremity arteries or bypass grafts, unilateral. The procedure is a noninvasive arterial diagnostic study that evaluates blood flow velocity and detects stenosis or occlusion in the arteries of one upper limb or in a single upper extremity bypass graft.
Service type: Noninvasive vascular diagnostic imaging (duplex ultrasound)
Typical site of service: Outpatient vascular laboratory, hospital outpatient department, or ambulatory imaging center
Clinical & Coding Specifications
Clinical Context
A typical patient is a 68-year-old with a history of peripheral arterial disease and symptoms of unilateral upper extremity ischemia, such as rest pain, coolness, pallor, decreased radial pulse, or nonhealing hand ulcers. The patient is referred from vascular surgery or primary care for a noninvasive arterial duplex evaluation of the right upper extremity arteries to assess arterial patency, flow velocity, stenosis, or anastomotic integrity of a prior bypass graft.
Workflow: The vascular laboratory schedules the patient for a dedicated arterial duplex of one upper extremity. On arrival, vascular technologists verify identity and indications, review prior imaging and procedures, and obtain vital signs including blood pressure and limb comparison when indicated. The technologist performs segmental duplex imaging from the subclavian/axillary through the radial and ulnar arteries using B-mode, color Doppler, and spectral Doppler to measure peak systolic velocities, waveform morphology, and velocity ratios. Images and velocity measurements are documented in the study report. A vascular medicine or vascular surgery provider interprets the study and issues a signed report describing hemodynamic significance of any stenosis or occlusion and recommendations for further management. Typical sites of service include an outpatient vascular laboratory, hospital outpatient department, or inpatient bedside when urgent evaluation is required.
Typical modifiers used to bill this service reflect laterality, professional vs technical components, unusual procedural circumstances, same-day multiple procedures, or interruptions in service; the most common payer interactions involve Medicare and commercial payors such as Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and employer/union plans (BUCA).
Coding Specifications
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