Standard International Trade Classification
U.S. imports of Electro-Diagnostic Apparatus & Radiological Parts (NES) (SITC 77429) totaled $115.1M in August 2026, imported from 59 countries.
Importers of Electro-Diagnostic Apparatus & Radiological Parts (NES) paid $15.1M in duties in August 2026, an average duty rate of 13.34% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataElectro-diagnostic apparatus not elsewhere specified—including electrocardiographs (ECG/EKG), electroencephalographs (EEG), electromyographs (EMG), ultrasound diagnostic units, and parts and accessories for radiological equipment—serves as a catch-all heading for medical electronic instruments that monitor or record physiological signals. FDA classifies most of these devices as Class II medical devices subject to 510(k) premarket notification, and importers must ensure each product has an active FDA clearance tied to its intended use. Parts and accessories imported under this heading for use in radiological apparatus may also be subject to radiation performance standards if they are integral to radiation generation or measurement. The breadth of this heading means classification disputes are common, and binding ruling requests from CBP are advisable for novel diagnostic technologies.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
5.5K import shipments a month
For products that straddle classification boundaries, importers should request a binding tariff classification ruling from CBP before the first shipment. Simultaneously, confirm FDA device classification under 21 CFR Part 870 (cardiovascular devices) or the relevant part, and obtain 510(k) clearance if required. Misclassification can trigger both duty underpayments and FDA admissibility holds.
Ultrasound diagnostic systems operate on acoustic rather than ionizing radiation principles, so they are not classified under the X-ray apparatus heading. They generally fall within this electro-diagnostic NES heading. However, multimodal imaging platforms that combine ultrasound with X-ray or nuclear medicine functions may require a principal-use or essential-character analysis to determine the correct heading.
Basic heading 144 of 642 in section 7
Basic heading 77429 · $115.1M of $172.0B
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Imports · August 2026
origin
China pays 34.4% duty; Canada 1.8%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$115.1MYoY · free account
Exports
$103.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.3B of Electro-Diagnostic Apparatus & Radiological Parts (NES).
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.