Master UDI-DI: The New Layer Many MedTech Companies Don’t Understand

The implementation of Unique Device Identification (UDI) has already transformed regulatory compliance in the medical device industry.

Now, Europe is introducing an additional layer: Master UDI-DI — adding both structure and complexity to the system.

Understanding the UDI Structure

To fully understand Master UDI-DI, it’s important to distinguish between the different levels:

• UDI-DI → Identifies a specific device
• Basic UDI-DI → Groups devices with the same intended purpose and characteristics
• Master UDI-DI → Applies to highly individualized devices with specific design parameters

This new layer aims to better manage products with high variability.

Why Master UDI-DI Was Introduced

For certain devices — such as spectacle frames, lenses, and other customizable products — the number of variations can become overwhelming.

Master UDI-DI helps:
• Reduce the number of identifiers required
• Improve traceability
• Simplify product grouping
• Enhance recall efficiency

Key Benefits

Despite its complexity, Master UDI-DI brings several advantages:

✔ Better organization of device data
✔ Improved market surveillance
✔ Faster identification during recalls
✔ Stronger protection against counterfeit products

Challenges for Manufacturers

However, the implementation is not without challenges:

• Increased data requirements
• Risk of incorrect UDI assignment
• Need for cross-functional coordination
• Integration with EUDAMED

As highlighted in the discussion, errors in UDI can be costly — including recalls and data inconsistencies.

Timeline and Urgency

While the labeling deadline is set for November 2028, manufacturers should not wait.

EUDAMED requirements are already active, and preparation takes time.

👉 Early implementation reduces risk, cost, and operational pressure.

Best Practices

To ensure compliance, manufacturers should:

• Study MDCG guidance documents
• Validate data before submission
• Use tools for UDI calculation
• Involve project managers and cross-functional teams
• Seek expert support when needed

Who is Al Hajj Sam Mostafa? 

Al Hajj Sam Mostafa is founder and CEO of UDI Experts. He has nearly 10 years of UDI experience, in which he leads and provides his premiere UDI solutions to MedTech organizations. One of his prestige clients is of the Magnificent Seven (Big Tech) companies. UDI Experts continuously strives to offer their clients the best UDI services for the best prices. Their global services include medical device data collection, data registration, UDI label creation and UDI label support, UDI printing IQ/OQ/PQ, and much more. 

Who is Monir El Azzouzi? 

Monir El Azzouzi is the founder and CEO of Easy Medical Device a Consulting firm that is supporting Medical Device manufacturers for any Quality and Regulatory affairs activities all over the world. Monir can help you to create your Quality Management System, Technical Documentation or he can also take care of your Clinical Evaluation, Clinical Investigation through his team or partners. Easy Medical Device can also become your Authorized Representative and Independent Importer Service provider for EU, UK and Switzerland. 

Monir has around 16 years of experience within the Medical Device industry working for small businesses and also big corporate companies. He has now supported around 100 clients to remain compliant on the market. His passion to the Medical Device filed pushed him to create educative contents like, blog, podcast, YouTube videos, LinkedIn Lives where he invites guests who are sharing educative information to his audience. Visit easymedicaldevice.com to know more.  If you need help implementing QMSR or preparing your teams for FDA inspections, contact: info@easymedicaldevice.com

 If you are located outside the EU/UK/Switzerland and need an Authorized Representative (and possibly an Importer), we can support you as well.

Link

• Website: www.udiexperts.com
• Business LinkedIn: www.linkedin.com/in/udi-experts-600138189           
• Personal LinkedIn: www.linkedin.com/in/al-hajj-sam-m-03b69612
• YouTube UDI Video for Dawa Medical  (below)
• Import IQ: Episode 5 Understanding the UDI with Hussam Mustafa 
• UDI Experts YouTube Channel: www.youtube.com/@UDIExperts-o3z

Social Media to follow

• Monir El Azzouzi Linkedin: https://linkedin.com/in/melazzouzi
• Twitter: https://twitter.com/elazzouzim
• Pinterest: https://www.pinterest.com/easymedicaldevice
• Instagram: https://www.instagram.com/easymedicaldevice