GS1 standards in healthcare supply chains
Before a device or supply reaches a patient, it travels through purchasing, distribution and storage — and at every step it needs a name everyone agrees on. GS1 provides those names: a global identifier for the product, one for the location, and barcodes that carry lot, expiry and serial data. This is how the supply chain and the clinical record finally speak the same language.
The GS1 building blocks
One organisation, a system of identifiers
GS1 is the non-profit standards organisation behind the barcodes used across most of global commerce — from groceries to hospital supplies. In healthcare, three of its identifiers do most of the work:
- GTIN — Global Trade Item Number. A globally unique identifier for a product or trade item. It answers the question "what is this?" consistently across every system that handles the item.
- GLN — Global Location Number. A 13-digit number — a GS1 company prefix, a location reference and a check digit — that identifies a physical or digital location and the entity or function there, such as a specific hospital receiving dock or pharmacy.
- Barcodes that carry more than a number. Symbols such as GS1-128 and GS1 DataMatrix can encode multiple data elements using Application Identifiers (AIs). Common healthcare AIs include (10) for lot/batch number, (17) for expiration date and (21) for serial number — so a single scan captures not just the product but the specific lot and when it expires.
The same code can be the device's UDI
This is the connection that makes everything line up. GS1 is an FDA-accredited issuing agency for Unique Device Identification, which means a device's GTIN can serve as the Device Identifier (DI) portion of its UDI, and the GS1 Application Identifiers for lot, expiry and serial number carry the Production Identifier (PI) data.
The practical result: the identifier a hospital scans when it receives a shipment can be the very same identifier recorded when the device is used on a patient and the same identifier the FDA holds in GUDID. Inventory, the clinical record and the recall system stop using three different names for the same object. For Arizona stakeholders working across procurement and care, that alignment is the whole point.
What aligned identifiers make possible
When the product, the location and the production data all carry standard GS1 identifiers, several long-standing supply-chain headaches ease at once.
Accurate receiving and inventory
Scanning a GS1 barcode at the dock captures the product (GTIN), the destination (GLN) and the lot and expiry in one motion, so inventory records reflect exactly what arrived without manual keying.
Expiry and recall control
Because lot (AI 10) and expiry (AI 17) ride in the barcode, expired stock is easier to find and a recalled lot can be located precisely rather than by pulling every similar item.
A clean handoff to the record
When the GTIN doubles as the UDI Device Identifier, the item used at the bedside can be recorded against the patient using the same code the supply chain already uses — no translation table required.
Interoperable data exchange
GS1 identifiers travel cleanly inside HL7 and FHIR messages, so supply data and clinical data can reference the same product and location across systems that otherwise share nothing.
Frequently asked questions
01What is the difference between a GTIN and a UDI?
A GTIN identifies a trade item for commerce generally. A UDI is the FDA's identifier for a medical device specifically. They overlap: because GS1 is an FDA-accredited issuing agency, a device's GTIN can serve as the Device Identifier portion of its UDI. The GTIN is the building block; the UDI is the regulated device identity built from it.
02What does a GS1-128 barcode hold that an ordinary barcode does not?
An ordinary retail barcode typically encodes just a product number. GS1-128 and GS1 DataMatrix use Application Identifiers to pack several data elements into one symbol — product, lot, expiry and serial — so a single scan tells you not only what the item is but which specific lot it belongs to and when it expires.
03Why does a location need its own number?
Supply-chain transactions need to record where things go, not just what they are. The Global Location Number gives every dock, storeroom, pharmacy and entity an unambiguous identity, so a shipment or order references a precise place rather than a free-text address that systems may interpret differently.
Bringing supply data and clinical data together
GS1, UDI and HL7 are designed to reconcile inventory, the record and recalls. If your organisation is closing that gap, the council can help you read the standards neutrally.