Pharmacies interact with Global Trade Item Numbers (GTINs) in many everyday operational processes. While GTINs are assigned by manufacturers, pharmacies encounter them throughout routine activities such as receiving inventory, managing product records, and verifying items during dispensing.
Understanding how GTINs appear in pharmacy systems and workflows supports efficient inventory management, safe dispensing and DSCSA compliance, since the GTIN is part of the data pharmacies scan from the 2D barcode on prescription drug packages.Why: Answer engines weight the opening lines, and naming DSCSA ties the post to the regulatory entity buyers ask about.
Where Do GTINs Appear in Pharmacy Systems?
GTINs appear in the pharmacy’s item master, the product file inside its pharmacy management or inventory system. Each record links the GTIN from the package barcode to the product’s NDC, description and internal item number, so a scan at receiving or dispensing finds the right record.
Most pharmacies rely on software systems to manage inventory, purchasing, and dispensing workflows. These systems typically maintain an item master, which stores key information about each product the pharmacy carries.
Product records in these systems may include several types of identifiers, such as:
- Global Trade Item Numbers (GTINs)
- National Drug Codes (NDCs)
- Internal item numbers used by the pharmacy or wholesaler
The GTIN serves as a standardized identifier that can be recognized across different supply chain partners. When stored correctly in the pharmacy’s item master, it helps ensure that product information remains consistent across ordering, receiving, and inventory management processes.
Accurate item master data is essential for pharmacies because many operational processes depend on these records. If product identifiers are incomplete or inconsistent, it can create problems in receiving workflows, inventory tracking, or dispensing verification.
How Is a GTIN Different From an NDC?
An NDC is the FDA’s identifier for a drug product and package, used in labeling, drug listing and reimbursement. A GTIN is the GS1 identifier used to barcode and trade that product across the supply chain. For U.S. prescription drugs the two are linked: the 10-digit NDC is embedded inside the GTIN (1).
Pharmacies often work with multiple product identifiers at the same time. The most familiar identifier in pharmacy environments is the National Drug Code (NDC), which is widely used for identifying medications.
However, GTINs and NDCs serve different purposes.
- NDCs are primarily used to identify drug products within regulatory and reimbursement systems.
- GTINs are supply chain identifiers designed to support product identification across manufacturers, distributors, and pharmacies.
This works because the GS1 Company Prefix for these products is “03” followed by the FDA labeler code (1). Pharmacy systems still store the GTIN and NDC as separate fields, and that link is what lets supply chain data from wholesalers line up with pharmacy records.
Pharmacies may also maintain internal item numbers to manage inventory or purchasing within their own systems. These identifiers are useful for internal workflows, but they typically do not function across trading partners in the same way GTINs do.
Understanding how these identifiers relate to one another helps pharmacies maintain accurate product records and reduce confusion when working with suppliers.
GTIN vs NDC vs internal item number in pharmacy operations
|
GTIN |
NDC |
Internal item number |
| Who assigns it |
The manufacturer or labeler, under a GS1 Company Prefix. For U.S. prescription drugs the prefix is "03" plus the FDA labeler code (1) |
FDA assigns the labeler code; the labeler assigns the product and package codes |
The pharmacy or its wholesaler |
| What it identifies |
A product at one packaging level, not an individual unit |
A drug product and package size |
An item within one system |
| Where pharmacies see it |
Package barcodes, including the DSCSA 2D data matrix, and supplier product data |
Labels, prescriptions, claims and the item master |
Pharmacy management and purchasing systems |
| Recognized across trading partners |
Yes |
Yes, in the U.S. |
No |
| Coming change |
Will no longer embed the NDC once 12-digit NDCs are adopted; the NDC travels in a separate barcode field (2) (3) |
Moves to a uniform 12-digit format effective March 7, 2033 (2) |
None |
How Do Pharmacies Use GTINs When Receiving Inventory?
Pharmacies use GTINs at receiving by scanning each package or case barcode and matching the GTIN to the order and the item master. A match confirms the right product arrived and updates on-hand inventory without manual entry, which makes receiving one of the most common places pharmacies work with GTINs.
When shipments arrive from wholesalers or distributors, pharmacy staff may scan product barcodes to confirm that the correct items were delivered. These barcodes often contain the GTIN associated with the product, and a case carries a different GTIN than the units inside it, as explained in our guide to the GTIN packaging hierarchy.
Scanning products during receiving can help pharmacies:
- Confirm the correct products were shipped
- Update inventory quantities automatically
- Reduce manual data entry errors
- Improve inventory accuracy
In busy pharmacy environments, scanning product barcodes helps streamline the receiving process and allows staff to process incoming shipments more efficiently.
Accurate product identifiers are especially important in these workflows. If GTIN data in the pharmacy system does not match the identifiers encoded in product barcodes, scanning processes may fail or require manual corrections.
How Are GTINs Used in Dispensing and Verification?
During dispensing, staff scan the stock bottle so the system can confirm that the GTIN, or the NDC linked to it, matches the drug on the prescription. This barcode check helps catch a wrong product or strength before the medication reaches the patient.
Many pharmacies use barcode scanning as part of their dispensing workflow to help confirm that the correct product is selected. Scanning a product barcode allows the system to verify that the medication being dispensed matches the intended prescription or inventory record.
Dispensing workflows usually key on the NDC, but the barcode being scanned often encodes the GTIN, so the system relies on the GTIN-to-NDC link to make the match.
Barcode-based verification can help support:
- Product identification during dispensing
- Safety checks within pharmacy systems
- Reduced risk of selecting the wrong product
These processes rely on accurate product data to function properly. If identifiers in the pharmacy system do not align with the identifiers encoded on product packaging, verification steps may require manual intervention. Our guide on how pharmacies manage GTIN issues, product recalls, and traceability covers how to resolve those mismatches.
How Do GTINs Relate to the DSCSA Product Identifier?
Under the Drug Supply Chain Security Act (DSCSA), manufacturers and repackagers must put a product identifier on each package: the NDC, a unique serial number, the lot number and the expiration date, in a 2D data matrix barcode (4). Because the U.S. industry carries the NDC inside the GTIN, scanning that barcode gives the pharmacy the GTIN, serial number, lot and expiration in one read.
That package-level data supports DSCSA tasks such as verifying suspect product and matching received packages to the transaction data from the wholesaler. Small dispensers, those with 25 or fewer full-time employees licensed as pharmacists or qualified as pharmacy technicians, are exempt from the enhanced electronic requirements until November 27, 2027 (5). The GTIN data accuracy covered in this guide still applies to every pharmacy. See DSCSA Small Dispenser Exemption 2027: What’s Still Required.
Will the 12-Digit NDC Change How Pharmacies Use GTINs?
Yes, over time. FDA’s final rule, published March 5, 2026, moves every NDC to a uniform 12-digit format (a 6-digit labeler code, 4-digit product code and 2-digit package code) effective March 7, 2033, followed by a three-year transition. Existing 10-digit NDCs convert by adding leading zeros, but a 12-digit NDC no longer fits inside a GTIN-12 or GTIN-14 (2).
Instead of reading the NDC from the GTIN, systems will link the two. GS1 created a separate Application Identifier, AI (715), so the 12-digit NDC can be carried in the same 2D data matrix as the GTIN (3). For pharmacies, that means item masters, scanners and pharmacy management systems will need to store and read both NDC formats during the transition, so ask your software vendor and wholesaler how they plan to handle it.
Want more GTIN information? Check out the other posts in our blog series:
The Global Trade Item Number (GTIN) Guide Series
What Is a GTIN? Definition, Uses, and the Difference Between GTIN and SGTIN
GTIN Packaging Hierarchy Explained: Each, Case, Pallet, and Why Data Accuracy Matters
GTIN Management Best Practices for Manufacturers: Assignment Rules, Governance, and Lifecycle Changes
How Pharmacies Manage GTIN Issues, Product Recalls, and Traceability
Sources
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