A regulatory affairs guide to the pictograms your labels are required to carry — and the 2026 EU REP symbol change you need to track
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This article is for general informational purposes and is not regulatory advice. Manufacturers should verify symbol requirements against the current version of ISO 15223-1 and applicable regulatory guidance.
ISO 15223-1:2021 is the internationally recognized standard that defines symbols used on medical device labels, packaging, and accompanying information to communicate critical safety and regulatory information without language-specific text.
The ISO 15223 Symbols That Trigger a Labeling Recall
A single wrong pictogram on a device label isn’t a cosmetic problem. It’s a labeling nonconformance that can hold up a shipment, trigger a Notified Body finding, or in the worst case, force a recall.
ISO 15223-1:2021 is the standard behind nearly every symbol on a medical device label — manufacturer, batch code, sterile, use-by date, and dozens more. It’s not optional guidance. It’s the harmonized reference regulatory affairs teams are expected to follow for CE marking label symbols, and it just changed in a way that affects almost every CE-marked device on the market.
From the floor: I’ve reviewed label proofs where a well-meaning graphics team swapped in an old sterilization icon because it “looked close enough” to what the previous product used. It wasn’t the same symbol, and it wasn’t accompanied by the batch reference the standard requires next to it. Having reviewed manufacturing and quality documentation across multiple industrial environments, I’ve repeatedly seen labeling errors originate not from misunderstanding the requirements, but from uncontrolled template reuse. That kind of small mismatch is exactly what a label review process is supposed to catch before it reaches a Notified Body’s desk — not after.
👉 Before your next label revision goes to print, confirm every symbol still matches current guidance. Most labeling nonconformances aren’t due to unfamiliarity with the standard — they’re due to reusing an old label file without checking what changed. Get the ISO 13485 Gap Assessment Checklist and confirm your revision management process is catching this before a reviewer does.
In This Guide
- What ISO 15223-1:2021 actually covers and why it’s harmonized under MDR/IVDR
- The seven symbol categories and what each one communicates
- The 2026 EU REP symbol change — what changed, when, and what it means for your labels
- Common labeling mistakes that surface in document reviews
- FAQ
Table of Contents
👉 Start Here
- ISO 15223 — Symbols for Medical Devices Package — bundles Part 1 (General Requirements) and Part 2 (Symbol Development, Selection and Validation) directly from ANSI Webstore. Use code CC2026 for 5% off through December 31, 2026.
- ISO 13485 Gap Assessment Checklist — confirm your label review process is set up to catch labeling nonconformances before a Notified Body does.
What Is ISO 15223-1:2021?
ISO 15223-1:2021, Medical devices — Symbols to be used with information to be supplied by the manufacturer — Part 1: General requirements, is now in its fourth edition. It defines the standardized pictograms manufacturers use on labels, packaging, and accompanying documentation so a device can be understood across languages and markets without translation.
It was harmonized under both EU MDR and EU IVDR in January 2022 — one of a relatively small number of standards to hold that status — which means using it correctly carries a presumption of conformity with the corresponding MDR/IVDR labeling requirements. A companion standard, ISO 15223-2, covers how new symbols get developed, selected, and validated when nothing in the existing library fits.
Because ISO 15223-1 is harmonized under MDR and IVDR, proper symbol usage can support a manufacturer’s demonstration of conformity with labeling requirements. In practice, auditors and Notified Bodies routinely review symbol usage as part of labeling assessments — this isn’t a peripheral checklist item, it’s one of the more commonly reviewed elements of a technical file.
Why Manufacturers Use Symbols
Medical devices are distributed across multiple countries and languages. Standardized symbols reduce the need for translated label text while helping manufacturers meet labeling requirements consistently across global markets. A single symbol library means the same pictogram carries the same meaning whether a device ships to Germany, Japan, or Brazil — without a separate translated label for each market.
ISO 15223-1 Medical Device Symbols Explained
ISO 15223-1 organizes its medical device label symbols into seven functional groups:
- Manufacturing — manufacturer identity, date of manufacture, country of manufacture
- Storage — temperature limits, humidity limits, keep dry, keep away from sunlight
- Safe use — single use, do not use if damaged, consult instructions for use
- Sterility — sterile, sterilization method, do not resterilize
- IVD-specific — symbols unique to in vitro diagnostic devices
- Transfusion/infusion — symbols for blood and infusion-related devices
- Other — symbols that don’t fit cleanly into the categories above but are still standardized
Every symbol in the standard comes with a defined title, a description of what it communicates, and any accompanying information it must be paired with — a batch code symbol without an actual batch number next to it isn’t a valid use of the symbol.
Most Common ISO 15223-1 Medical Device Symbols
The following symbols represent some of the most commonly encountered markings in medical device labeling. This is not a complete list, but these symbols appear on a significant percentage of devices entering regulated markets.
| Symbol Title | Clause | What It Communicates |
|---|---|---|
| Manufacturer | 5.1.1 | Identifies the legal manufacturer; name and address must accompany it |
| Date of manufacture | 5.1.3 | The date the device was produced |
| Use-by date | 5.1.4 | The date after which the device should not be used |
| Batch code (LOT) | 5.1.5 | Identifies the manufacturing batch or lot |
| Catalogue number (REF) | 5.1.6 | The manufacturer’s catalogue/model number |
| Serial number (SN) | 5.1.7 | Identifies a specific individual device |
| Importer | 5.1.8 | Identifies the entity importing the device into a given market |
| Sterile | 5.2.1 | Device has been through a sterilization process |
| Do not resterilize | — | Device is not to be resterilized after use |
| Do not use if package damaged | — | Consult instructions for use if packaging integrity is compromised |
| Single use | — | Device is intended for one use only |
This is a reference sample, not the full symbol library — the standard runs well beyond these. For the complete set of ISO 15223 symbol meanings, always validate current symbol usage against the live ISO document rather than a saved reference sheet, since amendments do get issued.
The 2026 EU REP Symbol Change
The most consequential update to this standard in years just took effect. Amendment EN ISO 15223-1:2021/A1:2025 replaces the long-standing “EC REP” symbol for a medical device’s authorized representative in the EU with a new “EU REP” symbol, and introduces a generic “XX REP” framework where “XX” is swapped for the applicable country or jurisdiction code.
The change was requested by the European Commission in May 2024, specifically to eliminate confusion between “EC” as a regulatory abbreviation and “EC” as the ISO 3166-1 country code for Ecuador. ISO adopted the amendment in March 2025, and it was formally harmonized into the Official Journal of the European Union on June 17, 2026, through Commission Implementing Decision (EU) 2026/1231 (amending MDR-side Decision 2021/1182) and Commission Implementing Decision (EU) 2026/1313 (amending IVDR-side Decision 2021/1195).
The European Commission has been explicit that this is a purely editorial change — it does not alter the authorized representative symbol’s role, responsibilities, or the device’s safety or performance profile in any way. This amendment is now one of the more consequential updates among the current round of MDR harmonized standards, given how widely the symbol appears across the CE-marked device population.
👉 Planning an upcoming label revision? Download the ISO 13485 Gap Assessment Checklist to verify your revision management process is capturing changes to standards before they become audit findings.
Do You Need to Update Your Labels Right Now?
The most common objection: “Do we need to reprint every label immediately?”
No. The Commission built in a five-year coexistence period. Manufacturers may continue using the legacy “EC REP” symbol under the original EN ISO 15223-1:2021, or transition to the new “EU REP” symbol under the amendment — both are valid during this window. The old standard’s reference isn’t withdrawn until June 15, 2031 under MDR and June 17, 2031 under IVDR. After those dates, only “EU REP” confers presumption of conformity.
In practice, this means:
- If you are about to run a new label print or design revision anyway → use the new EU REP symbol now rather than reprinting again later.
- If your current labels are compliant and not due for revision → there is no requirement to act immediately; plan the change into your next scheduled label update.
- If you have a Notified Body conformity review coming up → confirm with them directly whether they expect the new symbol in your current submission, since individual Notified Body expectations can vary during a transition window.
Common ISO 15223 Labeling Nonconformances
Most common finding: inconsistent symbol usage across packaging levels — the outer carton uses one version of the authorized representative symbol while the inner unit label uses another, with no documented rationale for the difference.
Other recurring issues: sterilization method symbols that don’t match the actual method used (ethylene oxide vs. irradiation vs. steam each has a distinct symbol); batch code or serial number symbols placed on a label without the actual batch or serial data adjacent to them; and reused label templates that carry forward a superseded symbol simply because nobody flagged the amendment during change control review.
⚠️ None of these mistakes require a new symbol library to fix — they require a label governance process that actually checks current symbol validity before a label goes to print, not just before the first label was ever approved.
Quick Reference Checklist
✅ Current label set reviewed against the live ISO 15223-1:2021 symbol library ✅ Sterilization method symbol matches the actual method used
✅ Batch code, catalogue number, and serial number symbols paired with real data
✅ EU REP transition plan documented, even if no immediate label change is required
✅ Packaging levels (outer carton, inner unit, IFU) checked for symbol consistency
✅ Change control process flags standard amendments, not just initial approvals
FAQ
What is ISO 15223-1:2021?
It’s the international standard defining the pictograms used on medical device labels, packaging, and accompanying information — covering everything from manufacturer identity to sterilization method. It’s currently in its fourth edition and harmonized under both EU MDR and IVDR.
Do I have to switch to the EU REP symbol immediately?
No. The European Commission built in a five-year coexistence period. The legacy EC REP symbol remains valid until the original standard’s reference is withdrawn — June 15, 2031 under MDR and June 17, 2031 under IVDR.
Is the EU REP change a safety-related update?
No. The Commission has described it as a purely editorial change, made to eliminate confusion with Ecuador’s ISO 3166-1 country code. It does not change the authorized representative’s role or responsibilities.
What’s the difference between ISO 15223-1 and ISO 15223-2?
Part 1 defines the actual symbol library and how symbols must be used. Part 2 covers the process for developing, selecting, and validating a new symbol when nothing in the existing library fits a specific need.
Does every medical device need every symbol in the standard?
No. Which symbols apply depends on the device — a non-sterile reusable device won’t carry sterilization symbols, for example. The standard defines what each symbol means and how to use it correctly; it doesn’t mandate that every device carry every symbol.
What’s the most common labeling mistake regulatory teams miss?
Inconsistent symbol usage across packaging levels — using an updated symbol on one layer of packaging while an older version persists on another, usually because a label template wasn’t fully reviewed during a revision.
Where can I find the actual symbol library?
ISO 15223-1:2021 and its companion ISO 15223-2 are both available for purchase through ANSI Webstore, either individually or as a combined package.
Should my Notified Body confirm which symbol version they expect?
During the transition period, manufacturers should confirm expectations directly with their Notified Body, particularly if a labeling review or conformity assessment is already underway.
📥 Free Resources
- ISO 13485 Gap Assessment Checklist — free checklist for medical device manufacturers assessing their QMS against ISO 13485 requirements, including the revision management processes that keep labeling current.
- ISO 9001 Roadmap — step-by-step implementation guide for manufacturers building or improving a quality management system from the ground up.
- Manufacturing Compliance Checklist — practical compliance reference covering key ISO, OSHA, and quality requirements across production environments.
Not Sure What to Do Next?
🔹 Still researching how labeling symbols fit into your broader QMS? Start with ISO 13485 Documentation Requirements and Common Mistakes in ISO 13485 QMS to see where document control connects to labeling accuracy.
🔹 Ready to review your current label set? Check it against Sterilization Standards Overview and UDI Requirements Explained — both cover label-adjacent requirements that pair directly with ISO 15223-1 symbols.
🔹 Need to purchase the standard itself? Get the ISO 15223 Symbols Package from ANSI Webstore — available individually or bundled with Part 2, with code CC2026 for 5% off through December 31, 2026.
Symbols look like a small detail until one of them is wrong on a printed label already in circulation. The Standards Navigator will keep tracking the EU REP transition and any further ISO 15223 amendments as they’re published.
Don’t Let a Symbol Be the Reason for a Finding
Labeling nonconformances are some of the most avoidable findings in a Notified Body review — the standard is published, the symbols are defined, and the fix is almost always a revision management gap rather than a technical one.
The Standards Navigator tracks ISO 15223 amendments, MDR/IVDR labeling requirements, and medical device documentation standards so your labels don’t fall out of step with a standard that changed while nobody was watching.
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