UDI Implementation Compared: MFDS, FDA, and EU MDR Timelines
Unique Device Identification (UDI) requirements differ across Korea, EU, and US. A unified UDI strategy reduces operational complexity for multinational manufacturers.
What Is UDI
UDI enables:
- Adverse event tracking and recalls
- Counterfeit detection
- Inventory management in hospitals
- Real-world evidence collection
- Supply chain transparency
UDI Comparison Across Jurisdictions
| Aspect | MFDS (Korea) | FDA (USA) | EU MDR |
|---|---|---|---|
| Framework | UDI System for Medical Devices (2022) | FDA UDI Rule (2013) | EU MDR Articles 27-29 (2017) |
| Database | KUDI (한국의료기기 UDI 정보시스템) | GUDID (Global UDI Database) | EUDAMED |
| Issuing agencies | GS1 Korea, HIBCC, ICCBBA | GS1, HIBCC, ICCBBA | GS1, HIBCC, ICCBBA, IFA |
| Class I implementation | 2027 | 2022 (final phase) | 2025 |
| Class II implementation | 2025 | 2018 | 2023 |
| Class III/IV implementation | 2022 | 2014 | 2021 |
| Direct mark on device | Required for permanent reusable devices | Required for implantables/reusable | Required for reusable devices |
| AIDC format | GS1-128, Data Matrix, QR Code | GS1, HIBCC formats | GS1, HIBCC formats |
MFDS UDI System (KUDI)
The Korean UDI system is newest and still in phased rollout.
KUDI Phased Implementation
| Phase | Effective Date | Device Class |
|---|---|---|
| Phase 1 | 2022-07-01 | Class IV (highest risk) |
| Phase 2 | 2023-07-01 | Class III |
| Phase 3 | 2025-07-01 | Class II |
| Phase 4 | 2027-07-01 | Class I |
KUDI Database Submission
For each Korean-marketed device:
- Obtain UDI from MFDS-recognized issuing agency (GS1 Korea, HIBCC, ICCBBA)
- Register device data in KUDI database
- Apply UDI to labels and packaging
- Submit UDI through KLH
KUDI registration includes ~40 data elements about the device.
Unified UDI Strategy
For manufacturers in all 3 jurisdictions:
Step 1: Single Issuing Agency
Use one issuing agency (typically GS1) across all jurisdictions. Single DI per device works for FDA, EU, and MFDS.
Step 2: Unified Database Strategy
| Database | Submission Approach |
|---|---|
| GUDID (FDA) | Direct submission |
| EUDAMED (EU MDR) | Direct submission via Notified Body relationship |
| KUDI (MFDS) | Submission via KLH |
Step 3: Label Implementation
Single UDI label that contains:
- DI (unique to model)
- PI (lot/serial/expiration)
- AIDC barcode (GS1-128 or Data Matrix)
- Human-readable interpretation
Same UDI satisfies all 3 jurisdictions.
Step 4: Update Management
Changes to device require UDI database updates in all relevant jurisdictions:
- GUDID update for FDA
- EUDAMED update for EU MDR
- KUDI update for MFDS (via KLH)
Common UDI Implementation Mistakes
Mistake 1: Separate UDI Per Jurisdiction
Different issuing agencies, different DIs for same device across jurisdictions.
Fix: Single issuing agency, single DI globally.
Mistake 2: KUDI Registration Delayed
Korean device registered but KUDI database submission missed.
Risk: MFDS audit finding; potential market access issues.
Fix: KUDI submission within 30 days of MFDS approval.
Mistake 3: Direct Mark Requirements Missed
Reusable devices require direct mark UDI on device, not just on packaging.
Risk: Inspection finding; compliance gap.
Fix: Direct marking added at manufacturing for reusable devices.
Mistake 4: PI Format Inconsistency
Different production identifier formats across batches.
Risk: Tracking complexity; recall response slowness.
Fix: Standardized PI format across all manufacturing.
Mistake 5: AIDC Quality Issues
Barcode scans fail; UDI not machine-readable.
Risk: Hospital adoption issues; tracking ineffective.
Fix: Print quality validation; periodic scan testing.
KUDI Specific Requirements
Required Data Elements (KUDI)
Beyond standard UDI elements, KUDI requires:
- Korean device name
- Korean classification code
- KMD number (MFDS license number)
- KLH information
- Manufacturer information
- Korean indications for use
KUDI Submission Workflow
- Device approved by MFDS (KMD issued)
- KLH coordinates UDI assignment with issuing agency
- KLH submits KUDI registration via MFDS portal
- KUDI registration confirmed
- Device packaging produced with UDI
- Korean market launch
KUDI Update Triggers
Database updates required for:
- Device label changes
- Manufacturer information changes
- KLH changes
- Product discontinuation
- Significant device changes
Cost of UDI Implementation
| Component | Initial Cost | Annual Cost |
|---|---|---|
| Issuing agency fees | $3K–$15K | $1K–$5K |
| Label design and validation | $5K–$20K | Minimal |
| Database submission setup | $5K–$15K per jurisdiction | $2K–$5K per jurisdiction |
| Update management | Variable | $5K–$20K |
| Total | $20K–$70K | $10K–$35K |
Frequently Asked Questions
Q: Can we use the same UDI in Korea as we use for FDA?
A: Yes, the Device Identifier (DI) portion can be identical. KUDI accepts UDIs from GS1, HIBCC, and ICCBBA, same as FDA. Korean database registration is the additional step.
Q: What if our device has multiple package configurations?
A: Each unique package configuration requires separate UDI (different DI). Common for kit-based devices.
Q: Do accessories require UDI?
A: Yes if separately distributed. Accessories sold only with the device may share UDI with device.
Q: How does Leanabl help with KUDI?
A: Leanabl's Labeling Services include UDI strategy and KUDI submission coordination through KLH.
Q: What's the penalty for KUDI non-compliance?
A: MFDS may issue compliance notice or restrict market sales. Penalties scale with non-compliance severity.
How Leanabl Helps
- Labeling Services — UDI strategy and Korean labeling
- Korea License Maintenance — KUDI maintenance as part of license operations
- Korea Medical Device Registration — registration with UDI implementation
Contact Leanabl for UDI strategy.
Last updated: 2026-05-15.
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