Chapter 90 covers optical, photographic, cinematographic, measuring, checking, medical or surgical instruments and apparatus, precision instruments and apparatus, etc. Goods in this chapter generally have high-tech content and precision manufacturing characteristics, and are used in professional fields such as measurement, analysis, diagnosis, and treatment. The first 2 digits of the HS code are 90, which means it falls within this chapter. All medical diagnostic equipment (such as ultrasound, X-ray, MRI, etc.) is classified in this chapter. Heading 9018 covers instruments and appliances used in medical, surgical, dental or veterinary sciences, including scintigraphic apparatus, other electro-medical apparatus and sight-testing instruments. This heading includes diagnostic equipment (such as ultrasound diagnostic apparatus, electrocardiographs), therapeutic equipment (such as laser treatment apparatus), and veterinary instruments, etc. Vehicle-mounted ultrasound diagnostic apparatus, as medical diagnostic equipment, belongs to the electro-diagnostic apparatus under this heading. Code 901812 has 6 digits in total: the first 2 digits "90" represent Chapter 90 (optical, medical and other precision instruments); digits 3-4 "18" represent heading 9018 (instruments and appliances used in medical, surgical, dental or veterinary sciences); digits 5-6 "12" represent subheading 901812, namely "ultrasonic diagnostic apparatus". This subheading is specifically for ultrasound diagnostic equipment, including portable, vehicle-mounted and other forms of ultrasound diagnostic apparatus. Vehicle-mounted ultrasound diagnostic apparatus is classified under this subheading because of its ultrasound diagnostic function. The core function of a vehicle-mounted ultrasound diagnostic apparatus is ultrasound diagnosis, and it is medical diagnostic equipment, so it is classified under 9018 (medical instruments). Under 9018, it is further subdivided according to working principle, and ultrasound diagnostic equipment corresponds to 901812. It is not classified under 901819 (other electro-diagnostic apparatus) because it clearly uses ultrasound technology; it is not classified under 8708 (parts of motor vehicles) because it is essentially medical equipment, and being vehicle-mounted is only its usage scenario.

Product name: Declare the product name, which should accurately reflect the product attributes, such as "vehicle-mounted ultrasound diagnostic apparatus". Use: Explain the specific use, such as "used for medical diagnosis, can be installed on vehicles for mobile use". Working principle: Briefly describe the technical principle, such as "uses ultrasound to scan human tissue and generate images for diagnosis". Brand: Declare the product brand, such as "GE", "Philips", etc. If there is no brand, it must be stated. Model: Fill in the specific model, such as "Vivid iq", etc., to identify the product. Whether portable: State whether it is portable, such as "Yes, vehicle-mounted and mobile". Whether electric: State whether it is electrical equipment, such as "Yes, electrically driven". Product name: vehicle-mounted ultrasound diagnostic apparatus; Use: used for medical diagnosis, can be installed on vehicles for mobile use; Working principle: uses ultrasound to scan human tissue and generate images; Brand: GE; Model: Vivid iq; Whether portable: Yes; Whether electric: Yes. Failure to indicate the vehicle-mounted characteristic may lead to incorrect classification as an ordinary ultrasound diagnostic apparatus. Incorrect description of the working principle, such as mistakenly writing X-ray, leading to classification errors. Failure to declare brand and model affects customs document review and subsequent supervision.

The core basis for classification is the product's function, working principle and use. The main function of a vehicle-mounted ultrasound diagnostic apparatus is ultrasound diagnosis, and it is medical equipment, so it is classified under 9018. Its vehicle-mounted characteristic does not affect classification because HS codes are mainly based on the attributes of the equipment itself rather than the usage scenario. If the equipment is a part specially used for vehicles and has no diagnostic function, it may be classified under Chapter 87, but this product has an independent diagnostic function, so it is classified under 9018. 901819 Other electro-diagnostic apparatus: 901819 covers non-ultrasound electro-diagnostic equipment, such as electrocardiographs and electroencephalographs. Vehicle-mounted ultrasound diagnostic apparatus should be classified under 901812 because it uses ultrasound technology. 901890 Other medical instruments and appliances: 901890 is a residual subheading for medical equipment not otherwise specified. Ultrasound diagnostic apparatus already has a clear subheading 901812, so it is not classified here. 870829 Parts and accessories of motor vehicles: 870829 is for vehicle parts, but a vehicle-mounted ultrasound diagnostic apparatus is independent medical equipment and does not constitute an essential part of a vehicle, so it is not classified here. 902214 Other medical X-ray equipment: 902214 is X-ray diagnostic equipment, which is different from the ultrasound principle, so it is not classified here. Confirm whether the equipment's main function is ultrasound diagnosis. Confirm whether it is electrically driven rather than purely mechanical. Confirm whether it is independent equipment rather than a built-in vehicle part. Confirm whether it is used for medical diagnosis rather than industrial inspection. Confirm whether declaration elements such as brand and model are complete.

Is there a difference in HS code between a vehicle-mounted ultrasound diagnostic apparatus and an ordinary ultrasound diagnostic apparatus? There is no difference. HS codes classify according to the attributes of the equipment itself. A vehicle-mounted ultrasound diagnostic apparatus still belongs to ultrasound diagnostic apparatus and is classified under 901812. The vehicle-mounted characteristic only affects the usage scenario and does not change the classification. How can it be determined whether a vehicle-mounted ultrasound diagnostic apparatus should be classified under 9018 rather than Chapter 87? If the equipment has an independent medical diagnostic function and is not an essential vehicle part, it should be classified under 9018. If it is only specially used for vehicles and has no diagnostic function, it may be classified under Chapter 87. Is a medical device registration certificate required when declaring? According to customs regulations, imported medical devices require a medical device registration certificate. The specific requirements are subject to customs requirements, and it is recommended to prepare in advance. How can the tax rate for a vehicle-mounted ultrasound diagnostic apparatus be checked? Tax rates may change. The latest tax rate can be checked through the website of the General Administration of Customs or by consulting a customs broker. The tariff rate corresponding to HS code 901812 needs to be determined based on factors such as country of origin. If a vehicle-mounted ultrasound diagnostic apparatus has other functions, how should it be classified? If ultrasound diagnosis is the main function, it is still classified under 901812. If other functions are the main function, it may be classified according to those other functions. It must be determined according to the main function. When exporting a vehicle-mounted ultrasound diagnostic apparatus to different countries, is the HS code the same? The first 6 digits of the HS code are basically the same internationally, but countries may have further subdivisions in the later digits. It is recommended to check the customs code of the target country. Does a vehicle-mounted ultrasound diagnostic apparatus require commodity inspection? Medical devices generally require commodity inspection, subject to customs regulations. It is recommended to consult the local customs or commodity inspection department. How can classification errors for vehicle-mounted ultrasound diagnostic apparatus be avoided? Accurately declare elements such as product name, use, and working principle, and refer to customs classification decisions. If there are doubts, an advance ruling may be applied for.