Translate UDI, Device Identifier & Production Identifier

To translate UDI, Device Identifier and Production Identifier information accurately, a translator must separate medical-device identity from the words printed around it. Device labels, packaging, instructions for use, implant cards, inventory systems and regulatory submissions can contain human-readable product names beside a Unique Device Identifier carried in plain text and machine-readable form. The descriptive language may need translation; the UDI data normally must remain exact. One altered character can disconnect the target label from the device record used in distribution, inventory or post-market traceability.

This guide explains how to translate medical-device labels and records without changing UDI values, Device Identifiers, Production Identifiers, lot numbers, serial numbers or machine-readable UDI carriers. It solves one distinct high-intent search problem: what does the DI identify, what can appear in the PI, what belongs in the UDI carrier, which parts can be localized, how does GUDID relate to device identity, and how can multilingual labels stay traceable to the same version or model?

The working rule is translate user-facing device language, preserve the UDI and its governed components, identify the issuing system and package level, and verify every relationship after layout. FDA explains that a UDI generally contains a mandatory fixed Device Identifier identifying the labeler and specific version or model, plus a conditional variable Production Identifier carrying production data such as lot, serial, expiration or manufacture date when those elements appear on the label. This specialist article is educational translation guidance, not regulatory or clinical advice. It connects to Master Art of Translation, the protected Vocabulary Learning Hub, and How English Works without replacing the existing medical-device IFU and labeling owner.

A UDI is more than a product name

Medical-device labels can show brand, model, catalogue number, UDI and production data together. Treating all visible strings as one translatable label can corrupt traceability. Classify each field before translating anything. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Before release, ask what this field identifies: model/version, individual unit, batch, date, package level or labeler. The target should answer that question without forcing the reader to infer meaning from the shape of the code.

UDI combines governed identity and production data

FDA describes a UDI as generally containing a Device Identifier and, when present, Production Identifier elements. Translators can mistake the entire carrier for ordinary text. Protect the UDI value and translate explanatory labels separately. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Device Identifier is the fixed portion

The DI identifies the labeler and specific version or model of a device under the UDI system. Changing a DI to fit a target-language product name creates a different identity. Preserve the DI exactly. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Production Identifier is variable information

PI can include lot or batch, serial number, expiration date, manufacture date or another allowed production element. A translator can accidentally edit variable data while localizing nearby text. Treat every PI component as protected structured data. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

DI and PI are not interchangeable

DI identifies the version or model while PI identifies production-specific information. Calling both simply the device number hides their different functions. Keep DI and PI labels distinct in the target. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Human-readable and machine-readable forms coexist

FDA requires UDI presentation in easily readable plain text and automatic identification and data capture form in applicable contexts. Updating only one layer can make barcode and printed text disagree. Verify both forms after localization. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

AIDC is not decorative artwork

The machine-readable UDI carrier can use barcode or other automatic data-capture technology. Recreating or stretching it as ordinary graphics can affect scanability. Preserve the encoded data and test the final carrier. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Plain-text UDI must match machine-readable data

The human-readable interpretation helps users read the identifier without scanning. A mismatch between printed string and encoded payload creates traceability risk. Decode the carrier and compare it with visible text. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

UDI issuing systems have structured syntax

FDA-accredited issuing agencies define formats used to encode DI and PI data. Translating application identifiers or separators inside a carrier can break syntax. Protect issuer-specific data structures. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Application identifiers are machine syntax

Some UDI carrier formats use application identifiers or other data qualifiers around values. Those tokens can resemble ordinary parentheses or short numbers. Do not translate or remove them from machine data. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Package levels can have different identifiers

Different package configurations can require distinct device identifiers under UDI rules and issuing systems. Copying an inner-package DI onto an outer package can misidentify the package level. Keep packaging hierarchy and DI pairing intact. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Version or model identity is central to DI

The DI is tied to a specific version or model rather than every physical unit individually. Translating a model description does not authorize changing the DI. Preserve the source model-to-DI relationship. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Brand name is not the DI

A brand or trade name is human-facing product identity and may have official localized forms. Using the brand name as a substitute for DI weakens database traceability. Display brand and DI as separate fields. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Catalogue number is another identifier layer

Manufacturers often use catalogue or reference numbers in addition to UDI. A catalogue number can resemble a DI but belongs to the manufacturer’s system. Keep catalogue number and DI labels distinct. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Model number is not automatically the DI

A device can have a model number, catalogue number and UDI DI simultaneously. Collapsing them into one field creates ambiguity. Preserve each source identifier separately. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Lot or batch number belongs to production identity

PI can include a lot or batch value when it appears on the label. Translating alphanumeric lot strings can break recall and inventory matching. Preserve the exact lot value. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Serial number identifies an individual unit

A serial number can distinguish one specific device within a model or production context. Confusing it with DI turns unit identity into model identity. Keep serial and DI roles separate. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Expiration date can be PI data

Expiration date may form part of production identification when included on the label. Changing date order without controlling the encoding can create ambiguity. Preserve the actual date and follow the approved display standard. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Manufacture date can be PI data

Date of manufacture can also be encoded when present. Translating the date label while accidentally changing the value alters production history. Separate label localization from date data. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Date formatting requires regulation-aware handling

FDA UDI materials use standardized date presentation requirements for device labels. Locale-style dates can become ambiguous if freely reformatted. Follow the applicable device-label date rule rather than ordinary editorial preference. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Lot and serial are not the same field

A batch can contain many individually serialized devices. Merging the two because both look like production codes destroys granularity. Keep production fields discrete. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

UDI and GTIN can be related in some issuing systems

Certain issuing systems may use a GTIN as the device-identifier component. That does not make every UDI simply a retail barcode. Keep the UDI context and issuing system visible. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

UDI carrier can contain more than DI

Machine-readable carriers can encode DI and relevant PI elements together. Copying only the DI into a field labeled full UDI loses production data. Know whether the target field expects DI-only or full UDI. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

GUDID stores device-identification information

FDA’s Global Unique Device Identification Database contains device-identification data submitted by labelers. A GUDID record is not the physical device itself. Translate database descriptions without changing the submitted DI. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

AccessGUDID is a lookup layer

AccessGUDID lets users search device-identification information. Search result wording can differ from package text while the DI links the records. Use the DI to confirm the same device identity. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

GUDID description and label text can differ

Database fields and commercial labels serve different presentation purposes. A translator can mistake wording differences for identity differences. Verify through DI and version/model metadata. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Labeler identity is separate from device identity

The UDI system associates device records with a labeler. Translating company names casually can make the record look like another legal entity. Use official corporate naming while preserving DI. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Manufacturer and labeler are not always identical concepts

FDA notes that the labeler is usually the manufacturer but can be another responsible party in defined cases. Using manufacturer and labeler as loose synonyms can misstate responsibility. Translate the regulatory role accurately. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Direct marking can carry UDI on the device

Certain reusable devices can require permanent UDI marking under applicable rules. A translator may only see packaging and overlook the marked-device identity. Verify consistency between package, label and direct mark where relevant. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Reprocessed devices need context

Direct-marking rules can relate to devices intended for repeated use and reprocessing. Translating cleaning or reprocessing language does not change the device identifier. Keep use instructions and identity separate. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Software can be a medical device context

Software devices can also participate in UDI requirements depending on regulatory context. A version change can have identity implications beyond language localization. Do not infer DI continuity across software versions without regulatory input. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Firmware strings are separate from UDI

Embedded-device firmware versions can appear next to UDI fields. Translating a firmware version or treating it as DI corrupts technical configuration data. Protect version strings separately. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Accessories can have their own identity

Accessories and components can be separately identified depending on how they are marketed and regulated. Using the parent device DI for every accessory can misstate product identity. Preserve each source record’s identifier. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Kits can combine several device identities

Convenience kits or procedure packs can contain multiple components. One kit-level identifier does not automatically replace component identifiers. Keep kit and component layers distinct. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Implant cards can repeat device identity

Patient-facing cards may carry device and production identifiers in a compact layout. Translation can shift labels or values between rows. Use fixed field mapping and post-layout verification. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

IFU references can point to model rather than unit

Instructions for use often apply to a model family or product range. A serial number is usually too specific for generic IFU ownership. Keep document scope and device-identity level aligned. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Symbols around UDI can be standardized label content

Medical-device labels use standardized symbols for manufacturer, lot, serial and dates. Replacing symbols with improvised target-language graphics can alter recognized meaning. Follow the applicable symbol standard and translate accompanying text carefully. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

UDI prefix labels can be translatable

Visible words such as UDI, Device Identifier or Production Identifier can be explained in the target language. The encoded or printed identifier value remains protected. Translate labels while preserving the data string. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Right-to-left layouts need carrier testing

RTL packaging can visually reorder digits, Latin letters and punctuation. The underlying UDI can remain correct while the printed human-readable form becomes confusing. Test actual artwork and scan results. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Do not localize digits inside identifiers

A locale can use different numeral glyphs for ordinary text. UDI systems expect governed machine-readable data. Keep identifier digits in the required encoding. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Smart punctuation can damage HRI

Layout software can replace hyphens or parentheses with typographic variants. Human-readable identifier syntax can then diverge from encoded data. Protect HRI strings from typography rules. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Line wrapping can split UDI data

Narrow labels may force a long UDI string onto multiple lines. A bad break can make copying or interpretation difficult. Use approved layout while preserving token order. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Barcode resizing can affect scanability

Localization often changes artwork dimensions because text expands. Scaling a barcode or 2D symbol without checking specifications can harm data capture. Revalidate the final AIDC carrier after layout changes. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Quiet zones and print quality matter

Machine-readable carriers need sufficient physical quality for scanning. Crowding translated text against the symbol can degrade performance. Treat barcode space as protected layout infrastructure. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

OCR is not a substitute for scanning

A photograph or PDF of a label may allow OCR of the human-readable UDI. OCR can misread digits and separators. Decode the carrier or use structured source data to verify identity. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Spreadsheets can damage UDI fields

Long identifiers and serials can be converted to scientific notation or dates. Data corruption may occur before translation begins. Store UDI, DI and PI components as text. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

CSV needs explicit field definitions

CSV does not preserve data types. Applications can reinterpret dates, lots and serials differently by locale. Define every UDI-related column as a governed string or date field. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Machine translation should never rewrite the carrier

MT can expand abbreviations or normalize punctuation in visible UDI strings. A helpful-looking correction can break encoded identity. Lock UDI data before translation. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Translation memory can carry old product data

A previous label may contain an older DI, lot example or model number. High TM similarity can propagate obsolete device identity. Reuse language only after replacing protected fields from the current source. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Artwork templates can contain stale identifiers

Reusable packaging templates may preserve old barcodes or human-readable strings. Translation teams can update prose while leaving the wrong device identifier in place. Include identifier verification in artwork preflight. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Product-name translation does not create a new DI by itself

A device can have localized commercial names for different markets. Language change alone does not authorize the translator to invent or alter DI. Keep regulatory identity decisions with the labeler and regulatory team. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Regulatory market differences require controlled data

Different jurisdictions can have different UDI implementation details. Copying one market’s field labels or database assumptions into another can be misleading. Use market-specific regulatory instructions while preserving the source identifier. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

UDI changes are not ordinary editorial edits

When a DI legitimately changes, that is a product/regulatory data event. An editor should not change it as if correcting spelling. Require explicit authorized source data for identifier updates. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Version control matters

Device labels and GUDID data evolve through revisions. A target should record which source label and product version it translates. Do not silently merge current UDI data into historical artwork. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Recall workflows depend on exact identity

Lot, serial and DI information can support targeted field actions or recalls. A translated label with incorrect production identity can misdirect traceability. Verify unit and batch fields rigorously. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Post-market reports contain multiple identifiers

Incident reports can list DI, lot, serial, catalogue number and report IDs. Similar alphanumeric strings can be attached to the wrong label after translation. Build a field map before drafting. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Patient-facing language should not alter identifiers

Patients may need a plain-language explanation of UDI or serial information. Simplifying the explanation is appropriate; changing the value is not. Separate education from identity data. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Worked example: model and serial

A fictional device has one DI for its version/model and a PI containing an individual serial number. The target translates the model description but preserves both identity layers. Explain which field identifies the model and which identifies the unit. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Worked example: lot and expiration

A fictional package encodes DI, lot and expiration date in the carrier. The target-language label can translate Lot and Expiry labels while retaining the same values. Compare human-readable text with decoded AIDC data. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Worked example: package hierarchy

A fictional single unit and carton have different device identifiers. Copying the unit DI to the carton can look plausible but identify the wrong packaging level. Verify package level for every DI. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Error clinic

Common failures include DI/PI conflation, scientific notation, stale barcodes, date reinterpretation, labeler/manufacturer confusion and mismatched HRI/AIDC. These are identity and production-data errors rather than grammar errors. Run a dedicated UDI QA pass. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Release checklist

DI, PI elements, package level, model, lot, serial, dates, carrier and GUDID relationship all need verification. Checking only translated prose is insufficient. Scan, compare and verify the final artwork. The verification test must include both human-readable and machine-readable layers. A string can look correct on screen while the encoded carrier contains another value, or a correct barcode can sit beside stale printed text.

Frequently asked questions

UDI values should not be translated; user-facing labels can be localized. Users often ask whether DI and serial number are the same. Explain fixed model identity versus variable production identity. For data workflows, store UDI components as text or governed date fields and exclude them from locale-driven formatting, spelling correction and generative rewriting. Translation can then expand or contract around stable device data.

Connection to eduKateSG architecture

This specialist owner protects UDI identity rather than broad medical-device safety prose. Another IFU hub would cannibalize the existing medical-device owner. Use this page for UDI data and the existing guide for substantive IFU translation. A strong reviewer checks the record in both directions: scan or look up the identifier to confirm the device, then inspect the target label to confirm the same model, package level and production information.

Authoritative sources

FDA publishes UDI basics, form-and-content guidance and GUDID resources. Issuing agencies define carrier syntax and data formats. Verify final identity against the applicable official source and issuing system. Treat the label as translatable, the identifier or production value as protected, and the package-level relationship as something that must be checked after artwork generation. This separates language editing from device traceability.

Reference verification route

For U.S. UDI fundamentals, use FDA’s UDI Basics, the UDI form-and-content guidance, and the current GUDID guidance. Issuing-agency rules should be checked for the exact carrier syntax used by the device.

Translate | UDI, Device Identifier and Production Identifier — Preserve Medical Device Identity Across Languages