Supply Interoperability & Inventory Visibility
A medication or device should be just as traceable as the patient it is used on. This explainer covers how HL7, GS1 and UDI work together so supplies are tracked dock-to-bedside, how par-level management keeps the right stock on hand, and how inventory finally reconciles with the clinical record.
ArizonaThe problem interoperability solves
One physical item, three different systems
In most health systems, a single physical item — a drug, an implant, a supply — is described differently in the purchasing system, the clinical record and the recall notice. The materials team knows it by a catalog number, the nurse documents it by a generic name, and the manufacturer recalls it by a lot. When those identities do not line up, inventory counts drift, charges are missed, and a recall becomes a manual hunt.
Shared identification standards fix this at the root. GS1 identifiers (such as the GTIN) and the FDA's Unique Device Identification (UDI) give an item one machine-readable identity, while HL7 messaging carries that identity into clinical and administrative systems. The result is a supply chain and a clinical record that agree on what the item actually is.
Dock-to-bedside, with the record in agreement
Inventory visibility is built one scan at a time, using identifiers that travel with the item.
1 · Receive against a known identity
Items arrive bearing GS1 or UDI identifiers. Scanning them on receipt ties the physical stock to a consistent record rather than a hand-keyed catalog code.
2 · Track location and par
As stock moves to a storeroom, an automated cabinet or a procedure room, the same identifier follows it — so the system always knows what is where, and which items have fallen below par.
3 · Capture use at the point of care
When an item is used or a medication is dispensed, scanning it records consumption against the patient and decrements inventory in the same action.
4 · Reconcile with the clinical record
Because HL7 carries the item's identity into the EHR, what was documented as used and what inventory shows consumed describe the same thing — closing reconciliation gaps.
5 · Replenish and respond to recalls
Consumption data drives accurate replenishment, and when a recall lands, the shared identifier turns a manual search into a targeted query of exactly where the affected lot went.
Accuracy, safety and accountability in one layer
Inventory visibility is not a back-office nicety. Accurate, interoperable supply data means fewer stockouts at the moment of care, fewer expired items, and faster, more complete recall response when patient safety is on the line. It also supports honest charge capture and clearer accountability for high-cost implants and controlled items. Crucially, none of it requires a single proprietary platform — it requires that everyone use the same published identifiers and messaging standards, which is exactly the neutral ground AzHeC works to establish.
Frequently asked questions
01How do UDI and GS1 relate to inventory?
UDI is the FDA's requirement that devices carry a unique, machine-readable identifier; GS1 provides widely used identification standards (like the GTIN) that satisfy it. Either way, the item gets one consistent identity that inventory, clinical and recall systems can all reference.
02Where does HL7 come in?
HL7 is the messaging layer that carries item and clinical data between systems. It is how a scanned identifier at the point of care reaches the EHR and the administrative systems, so the supply record and the clinical record stay in sync.
03Does this require replacing our systems?
Not necessarily. The point of interoperability is that existing systems can agree by adopting shared standards and identifiers, rather than by everyone buying the same product. AzHeC is vendor-neutral and recommends no specific platform.
Bring inventory and the record into agreement
AzHeC convenes the hospitals, pharmacies, suppliers and agencies working toward dock-to-bedside supply visibility across Arizona. If that is your challenge, we would like to hear from you.