Summary & Overview
CPT 78458: Bilateral Venous Thrombus Imaging, Nuclear Medicine
CPT code 78458 denotes a diagnostic nuclear medicine procedure that uses an injected radiopharmaceutical to image the venous system and identify thrombi. This vascular imaging study, described as bilateral, is clinically important for diagnosing deep vein thrombosis and guiding subsequent management. Nationwide, accurate coding of this procedure affects claims processing, utilization tracking, and access to appropriate imaging modalities.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines payer coverage approaches, typical sites of service, and clinical context for interpretation. Readers will find a concise explanation of the service represented by the code, typical clinical indications, and what to expect in terms of where the service is performed.
The report provides national benchmarks where available, notes on documentation and coding practice, and a clinical summary to aid coding accuracy and communication between imaging providers and payers. Data not available in the input is explicitly noted in relevant sections of the full publication.
Billing Code Overview
CPT code 78458 describes a diagnostic nuclear medicine study in which a radiopharmaceutical agent is injected and imaging of the vascular system is performed to detect the presence and location of thrombi (venous clots). The procedure as described is a bilateral venous thrombus imaging study aimed at visualizing venous circulation and identifying occlusive thrombi.
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Service type: Diagnostic nuclear medicine vascular imaging
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Typical site of service: Imaging center or hospital imaging department (nuclear medicine suite)
Clinical & Coding Specifications
Clinical Context
A 62-year-old ambulatory patient presents to the nuclear medicine department with unilateral lower-extremity swelling and calf pain suspicious for deep vein thrombosis (DVT). The referring vascular surgeon orders a radionuclide venogram to evaluate venous patency after an inconclusive duplex ultrasound due to extensive soft-tissue edema and a prior orthopedic implant that limits ultrasound windows. The patient is screened for allergies and renal function; an IV line is established and a technologist injects a radiopharmaceutical agent (e.g., Tc-99m labeled macroaggregated albumin or similar) while sequential planar and optionally tomographic images are acquired of the bilateral lower extremity venous system. The interpreting nuclear medicine physician reviews dynamic and static images to identify focal filling defects, absence of flow, or delayed clearance consistent with acute or chronic thrombus. Findings are documented in a formal report, communicated to the referring provider, and images archived in the PACS. Typical workflow includes pre-procedure verification, informed consent when required by facility policy, radiopharmaceutical preparation and administration by trained staff, image acquisition by nuclear medicine technologist, and final interpretation by a board-certified nuclear medicine physician or radiologist.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the physician interpretation separate from the technical component. |