Imported intracranial stent for aneurysm coil support: treated as implantable appliance, not artificial body part, under CTH 9021 90 90

The dominant issue was whether an imported intracranial "stent" used in endovascular aneurysm treatment is classifiable as an "artificial part of the body" under CTH 9021 39 00 or as an "other implanted appliance" under CTH 9021 90 90. Applying Heading 9021 and the anatomical replacement test, the authority held the device does not replicate or substitute any body part or vessel wall; it therapeutically acts as an implantable scaffold to retain embolization coils and achieve occlusion while the native vessel remains. Since the competing subheadings are residual and the goods are not prosthetic substitutes, classification under 9021 31 00/9021 39 00 was excluded, and the goods were classified under CTH 9021 90 90.

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1. ISSUES PRESENTED AND CONSIDERED

1. Whether the "Solitaire AB Stent", an implantable intracranial neurovascular stent used in endovascular treatment of cerebral aneurysms, is classifiable under Customs Tariff Heading 9021 as an "artificial part of the body" under sub-heading 9021 39 00, or as an "other" implanted appliance under residual sub-heading 9021 90 90.

2. ISSUE-WISE DETAILED ANALYSIS

Issue 1: Correct sub-heading classification within Heading 9021 (9021 39 00 vs 9021 90 90)

Legal framework (as applied by the Court/Authority): The Authority applied the General Rules for Interpretation, principally Rule 1 (classification by the terms of headings/subheadings read with relevant notes) and proceeded to compare the competing subheadings within Heading 9021, assisted by the Explanatory Notes reproduced and relied upon for understanding the scope of "artificial parts of the body" and "other appliances ... implanted in the body, to compensate for a defect or disability".

Interpretation and reasoning: The Authority accepted that the product is an implantable device used inside brain blood vessels during treatment of wide-necked/complex cerebral aneurysms, functioning as a scaffold across the aneurysm neck to enable secure placement/retention of embolization coils and to maintain vessel patency. However, it held that classification under 9021 39 00 requires that the article must wholly or partially replace a defective body part (an anatomical substitution test), and that this replacement/substitution criterion is decisive. The Authority found that the stent does not replicate or substitute the vessel or aneurysm wall segment; rather, it therapeutically provides scaffolding to facilitate coil placement while the native vessel continues to exist around it. It therefore does not satisfy the essential requirement of being an "artificial part of the body" for 9021 39 00.

Conclusions: The claim for classification under 9021 39 00 was rejected because the device neither replaces nor substitutes an anatomical structure; it performs a therapeutic support function.

Issue 1 (continued): Applicability of residual entry 9021 90 90

Interpretation and reasoning: Having excluded the "artificial parts of the body" subcategory, the Authority held that the stent still falls within Heading 9021 at the four-digit level because it is an appliance implanted in the body to compensate for a defect/disability. The Authority then applied an elimination approach at the single-dash level and concluded that, since the product is not covered by specific preceding subheadings (including 9021 31/39), it falls under the residual category 9021 90 90. It treated 9021 90 90 as covering implantable/wearable medical appliances that compensate defects or disabilities but do not replace anatomy, and found that the stent's function of providing a scaffold facilitating secure placement of coils fits this scope.

Conclusions: The "Solitaire AB Stent" is classifiable under Tariff Heading 9021 and specifically under CTI 9021 90 90 as "Other".

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