US Agent for FDA: Mandatory Requirement for Foreign Manufacturers

A US Agent is a mandatory requirement for foreign Medical Device manufacturers exporting to the United States under US agent FDA requirement guidelines. The agent serves as a regulatory communication link between the FDA and client and supports compliance activities such as establishment of registration, device listing, and importer identification. The gent’s role also involves oversight of Medical Device Reporting (MDR), including timely submission of adverse event reports, investigation and evaluation processes, complaint handling, record maintenance, and adherence to premarket submission requirements for safe market access.

Who is a U.S. Agent?

A U.S. Agent is a designated representative based in the United States that has been appointed by a foreign Medical Device manufacturer. This requirement applies to all foreign establishments involved in manufacturing or processing Medical Devices intended for export to the U.S under US agent FDA requirement.

The U.S. Agent’s details are submitted through the FDA registration system, and and only one agent can be appointed per establishment. The individual must formally confirm their consent to act in this role, ensuring a valid regulatory point of contact within the United States.¹

Responsibilities of a U.S. Agent

The U.S. Agent must maintain a physical presence in the United States and be accessible during business hours for regulatory communication as part of FDA US agent services.

The responsibilities include:¹

• Acting as a communication link between the FDA and the foreign manufacturer.
• Responding to FDA queries regarding the devices.
• Assisting in scheduling FDA inspections.
• Receiving official information when the manufacturer is unreachable.

Requirements for Foreign Manufacturers When Appointing a U.S. Agent

Foreign manufacturers exporting Medical Devices to the United States must appoint a U.S. Agent as part of foreign manufacturer FDA compliance. The manufacturer remains responsible but must ensure accurate and timely coordination through the agent.²

Key regulatory requirements include:

• The manufacturer must designate only one U.S. Agent, submit their full contact details, and update any changes within 5 days.
• The establishment must be registered and devices listed in the FDA system before import into the U.S.
• Details of importers and entities involved in bringing devices into the U.S. must be submitted and regularly updated.^2,3

Other important regulatory requirements related to reporting, investigation, complaint handling, and premarket processes are discussed in the sections below.

Medical Device Reporting (MDR) Obligations for U.S. Agents

U.S.-designated agents are required to ensure that all reportable events are submitted to the FDA in accordance with applicable MDR regulations as part of US agent responsibilities. This includes compliance with timelines and submission standards outlined under §§ 803.50, 803.52, 803.53, and 803.56.²

Key reporting responsibilities include:

• Submitting MDR reports within 30 calendar days for events involving death, serious injury, or device malfunction.⁴ 
• Filing 5-day reports in cases requiring urgent remedial action to help prevent unreasonable risk of significant harm to public health or when specifically requested by the FDA.⁵ 
• Providing supplemental or follow-up reports when additional, updated, new, changed, or corrected information becomes available.⁶ 

Investigation and Evaluation of Reportable Events

Foreign manufacturers must ensure that all device-related adverse events are properly investigated through their U.S. Agent in line with US agent responsibilities. This includes assessing whether a device has caused or contributed to death, serious injury, or potential malfunction risks. Timely and complete evaluation is essential for accurate regulatory reporting.

Key responsibilities for event investigation include:

• Collecting all “reasonably known” information from user facilities, importers, and internal sources.
• Conducting detailed analysis, testing, and evaluation to determine the cause of the event.
• Submitting initial reports within 30 days and providing follow-up reports if additional information is obtained.^2,4

Medical Device Reporting Complaint Handling and Recordkeeping

Foreign manufacturers must ensure that all Medical Device Reporting (MDR) complaints are properly handled and documented through their U.S. Agent in accordance with foreign manufacturer FDA compliance.² This includes forwarding complaints, maintaining detailed records, and ensuring traceability of all reported events. Proper documentation is essential for regulatory compliance and inspection readiness.

Key responsibilities related to MDR complaint handling and recordkeeping include:

• Forwarding all MDR-related complaints to the foreign manufacturer and maintaining proof of communication.
• Maintaining complete MDR event files, including reports, evaluations, and supporting documentation.
• Retaining records for at least 2 years or the expected device life and allowing FDA access for review.^2,7

Registration, Device Listing, and Premarket Submissions

Under FDA regulations, foreign manufacturers must comply with requirements for FDA registration USA, device listing, and premarket submissions before marketing devices in the United States.² Premarket notification (510(k)) must be submitted at least 90 days in advance when introducing new devices or making significant changes. This process ensures that devices meet safety and effectiveness standards and are substantially equivalent to legally marketed devices.

Key situations requiring premarket submission include the following:

• When a device is introduced into the U.S. market for the first time
• When a new manufacturer markets an existing device type
• When significant design, material, or intended use changes are made
• When modifications may impact the device’s safety or effectiveness⁸

Image 1: U.S. Agent Requirement for Foreign Manufacturers

This image shows the mandatory requirement for foreign manufacturers to appoint a U.S. Agent for FDA compliance.

Conclusion

Appointing a U.S. Agent (FDA requirement) is essential for all foreign Medical Device manufacturers entering the U.S. market. The agent acts as a key communication link with the FDA and helps ensure that all regulatory requirements are followed time to time. However, the manufacturer continues to hold full responsibility for compliance. From registration and device listing to adverse event reporting and recordkeeping, effective coordination with the U.S. Agent is important. Having a reliable agent supports smooth regulatory processes, helps in quick communication, and ensures that Medical Devices are safe and meet quality standards before they are used by patients.

References 

1. Health C for D and R. U.S. Agents. FDA. Published online August 15, 2023. Accessed April 8, 2026. https://www.fda.gov/medical-devices/device-registration-and-listing/us-agents

2. 21 CFR 803.58 — Foreign manufacturers. Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-803/section-803.58

3. 21 CFR 807.40 — Establishment registration and device listing for foreign establishments importing or offering for import devices into the United States. Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-807/section-807.40

4. 21 CFR 803.50 — If I am a manufacturer, what reporting requirements apply to me? Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-803/section-803.50

5. 21 CFR 803.53 — If I am a manufacturer, in which circumstances must I submit a 5-day report? Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-803/section-803.53

6. 21 CFR 803.56 — If I am a manufacturer, in what circumstances must I submit a supplemental or followup report and what are the requirements for such reports? Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-803/section-803.56

7. 21 CFR 803.18 — What are the requirements for establishing and maintaining MDR files or records that apply to me? Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-803/section-803.18

8. 21 CFR Part 807 — Establishment Registration and Device Listing for Manufacturers and Initial Importers of Devices. Accessed April 8, 2026. https://www.ecfr.gov/current/title-21/part-807