UDI marking is a data workflow with a laser at the end of it

The hard part is not making the mark. It is ensuring the right identifier reaches the right device and is recorded in a system an auditor can query.

By LasersNews Desk·16 Jul 2026·2 min read

Unique Device Identification requires that a medical device carry an identifier that links it to a database record. The marking operation is the visible part of a workflow whose difficulty lies almost entirely in data handling.

What the identifier contains

A UDI has a device identifier — the model, essentially — and a production identifier covering lot or batch, serial number, manufacturing date and expiry where applicable. The production portion varies per unit or per batch, which means the marking system cannot mark a fixed string.

Where the difficulty is

Data source. The marking system must receive the correct identifier for the specific device in front of it, from the manufacturing execution system. That integration is the substance of most UDI projects.

Sequencing and traceability. If devices are marked out of order, or if a mark fails and the device is remarked, the association between physical device and record must survive. Systems that assume a fixed sequence break when reality intervenes.

Verification and record. The mark must be read back, graded and the result recorded against that device. A device whose code did not verify must be segregated, not passed on.

Failure handling. What happens when the reader cannot read the code, when the marking system loses connection mid-batch, or when a device is scrapped after marking — each needs a defined path, and each is where audits find gaps.

The marking part

By comparison, the physical marking is well understood. Annealing marks on stainless instruments, UV marking on polymer components, and additive-activated marking on plastics all have established parameter sets, and the constraint is the permanence and biocompatibility requirement rather than the marking capability.

The implication for equipment selection

Choosing a marking system for UDI on marking specifications alone misses the point. Integration capability — protocols, data handling, verification recording, and how the system behaves when something goes wrong — determines whether the project succeeds.

Manufacturers who scoped UDI as a marking purchase have generally found the integration work exceeded the equipment cost, and that the auditable portion of the requirement lived entirely in the software.

This article was produced by the LasersNews AI desk and reviewed by our editors.