UDI Compliance Worldwide: Navigating Global Unique Device Identification Requirements

Unique Device Identification (UDI) has become a global regulatory standard, with requirements now in force in the United States, European Union, Australia, Japan, China, and a growing number of other jurisdictions. The concept is straightforward: each device must carry a standardized identifier that allows it to be traced from manufacturer to patient. In practice, however, implementing a compliant UDI system across multiple markets involves navigating different database submission requirements, labeling format standards, and phase-in timelines that can create significant compliance complexity for manufacturers with diverse product portfolios.

US UDI Requirements Under 21 CFR Part 830

The FDA's UDI rule requires that each device carry a UDI in both human-readable (HIBC or GS1 format) and automatic identification and data capture (AIDC) format on its label and device package. The UDI consists of a Device Identifier (DI), which is specific to the device version or model, and a Production Identifier (PI), which carries variable data such as lot number, serial number, and expiration date. The DI must be submitted to the Global Unique Device Identification Database (GUDID) before the device is introduced into commercial distribution. Implantable devices must also carry a UDI on the device itself where technically feasible, and the UDI must be incorporated into medical records per FDA expectations.

EU UDI Requirements Under EU MDR and IVDR

The EU UDI system, implemented through EU MDR Annex VI and the corresponding EUDAMED UDI module, follows the same DI/PI structure as the FDA system but has jurisdiction-specific requirements for submission to EUDAMED and labeling language requirements. Key EU-specific UDI obligations include:

• Basic UDI-DI: The EU uses an additional identifier, the Basic UDI-DI, which groups devices sharing the same intended purpose, risk class, and essential design and manufacturing characteristics
• EUDAMED submission: Device registration in EUDAMED is organized around the Basic UDI-DI, and manufacturers must link all UDI-DIs to the appropriate Basic UDI-DI
• Labeling requirements: The UDI carrier on EU-marketed devices must comply with the format and placement requirements in EU MDR Annex VI, Part C
• UDI database updates: Changes to UDI data must be submitted to EUDAMED within defined timeframes, creating an ongoing data maintenance obligation

Multi-Market UDI Strategy

Manufacturers selling in multiple markets face the challenge of maintaining consistent UDI data across national databases that may have slightly different field definitions, mandatory data elements, and update frequencies. The most effective approach is to designate a single global UDI-DI that is submitted to all relevant national databases, using the same issuing agency (GS1 or HIBCC) across markets. This avoids the creation of market-specific DIs for the same device, which complicates traceability and increases the risk of database discrepancies. Manufacturers should also establish a UDI change management procedure within their QMS that identifies all affected databases whenever a device or labeling change triggers a new UDI-DI assignment.

Common UDI Implementation Challenges

Despite years of UDI implementation experience, several challenges remain prevalent. Product masters in ERP systems frequently lack fields for all required UDI data elements, creating manual workarounds that are difficult to sustain at scale. Labeling artwork changes required to accommodate UDI carriers - particularly AIDC symbols - can be expensive and time-consuming for large product portfolios. And the determination of when a change requires a new DI versus only a PI update remains a source of regulatory uncertainty that the FDA has addressed in guidance but that continues to require case-by-case judgment. Sequence Group can assist manufacturers with UDI gap assessments, GUDID and EUDAMED submission workflows, and labeling change management strategies.