Official schedule as of2026-09-15
2026 HTS Rev 19 · Active line
What this HTS page tells you
For HTS 2937.12.00.00, this page shows the official description, its place in the Chapter 29 hierarchy, and the current source-backed context available before you estimate a shipment. Coverage is limited to the current exported snapshot and this code's scope. The estimator below then applies origin, entry date, and shipment facts.
Code meaning, scope, and limits
Chapter context: Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones:.
Coverage boundary: this page defines classification meaning and observed scope only. It is not legal advice and does not substitute for invoice-level import classification review.
Official source context: the USITC HTS schedule and linked measure entries are the canonical basis for this output. If a result is missing or marked for review, the calculator needs additional context that cannot be inferred from this code alone.
2937Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones:
2937.12.00.00Insulin and its salts
No active child line is represented below this code in the current exported hierarchy. The calculator can use this record, while still preserving any engine review flags for rate form, origin, or entry facts.
Current context
Rate summary
FreeGeneral base rate
Shipment context requiredEffective rate
Origin requiredApplicable measures
2026-09-15Last represented change
Effective rate and applicable measures are not inferred until an origin, value, entry date, shipment mode, and fee assumptions are supplied below.
Authoritative shipment context
Model this shipment
HTS 2937.12.00.00 is fixed for this page. This is the same input contract and tariff engine used by the main calculator.
Classification2937.12.00.00
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Declared goods valueEnter quantity and price
Shipment inputsUSD · imports into the United States
Origin matters
Rate by country of origin
Same selected child or exact HTS and declared value. Base duty and additional measures are evaluated through the shared calculator core; unsupported or incomplete contexts withhold definitive rates and totals.
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Exact HTS 2937.12.00.00.
Country duty rates for the selected HTS and comparison value
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Effective
Duty on USD 10,000
Sources and details
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Country comparison shows customs duty on declared goods value: base duty plus represented additional measures. “Default” retains a country measure because a possible conditional exclusion requires entry facts that have not been proven; it is not a final eligibility determination. MPF, HMF, freight, and insurance remain in the shipment stack above and are not added to this table. A qualifying preference is never inferred unless the scenario is expressly selected and supported for that origin.
Heading 2937 peers · derived related codes
Related HTS codes
Active classifications from the current official hierarchy. Child lines stay anchored to this canonical category page when they do not have a separate public page.
The current HTS citation is always shown. USTR, CBP, Federal Register, and trade-program citations appear only after the shared engine returns them for the selected child, origin, date, value, and entry assumptions.
USITC · Harmonized Tariff ScheduleHeading 2937 — current revision
Official HTS description: Insulin and its salts
Heading 2937: Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones:
2026 HTS Rev 19 · effective . Review the linked official schedule and Chapter 29 notes for controlling legal text.
Choose a complete shipment context to see the exact USTR, CBP, Federal Register, or trade-program sources actually used for that result.
Review 1 represented base-rate revision
Base rate history for 2937.12.00.00
Effective
General
Special
2024-12-31
Free
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Questions about 2937.12.00.00
FAQ for this HTS code.
Is HTS 2937.12.00.00 an exact classification?
It is represented as a leaf in the current exported hierarchy. Exactness of the rate still depends on origin, tariff column, quantity unit, entry date, and any fact-dependent measure.
What is the current base duty?
The published General rate text is Free. Column 2, a supported qualifying preference, specific/compound units, and additional measures can change the shipment result.
Why does country of origin change the rate?
Origin determines the applicable tariff column, country-specific additional measures, and supported trade-program treatment. The comparison above runs every displayed country through the same engine; when the engine cannot prove a numeric result, the row says manual review instead of zero.
How is total duty calculated for this HTS code?
The shared engine resolves the applicable base or Column 2 rate, supported preference treatment, and additional measures, then calculates MPF and HMF separately when the selected entry assumptions support them. Freight and insurance stay outside the declared customs-value assumption and are added only to landed cost. Any unresolved component causes the final total to be withheld for manual review.
Catalog and API workflows
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Reference information only—not customs, legal, tax, or classification advice. Confirm the classification, valuation, origin, entry facts, and current measures with official sources or a qualified professional before entry.