SVP of Manufacturer, Quality, and Replenishment Operations, Cencora

Matt Sample

The FDA finalized a rule standardizing the NDC to a uniform, 12-digit format

The views and opinions expressed herein are those of the author and do not necessarily reflect the views or positions of

The National Drug Code (NDC) is the FDAs standard for uniquely identifying drugs in the US, appearing everywhere from packaging and DEA records to pharmacy and financial systems. More than a label, it serves as the pharmaceutical industry’s primary transactional identifier across manufacturers, distributors, pharmacies, payers, 

The rule takes effect on March 7, 2033, giving stakeholders a seven-year preparation window, and an additional three-year transition period to update labeling, systems, and data infrastructure. While standardizing this drug information will improve consistency and interoperability across the supply chain, it is much more complex than a simple formatting change. This rule presents a Y2K-style challenge for pharma, requiring unprecedented alignment and a coordinated shift across the industry.

Currently, the NDC is a unique 10-digit number that appears in several different formats (4-2-2, 5-3-2, or 5-4-1) listing a labeler, product, and packaging code. The new 12-digit structure introduces a single, standardized format (6-4-2). Transitioning away from the current NDC format will create a uniform system across all products, while resolving the limitations of the current 5-digit labeler code structure.

However, the shift is much more complex than it seems. The current linear barcode can’t accommodate a 12-digit code, requiring a coordinated shift to a different barcode format, most likely that of a 2D data matrix. With the implementation of the 

 (DSCSA), which required the 2D data matrix for prescription drugs, the industry has already started to adopt these barcodes. The challenge now is extending them more broadly, particularly for over-the-counter drugs, where no standardized approach exists to shift to a 2D barcode.

Another nuance to consider is that during the three-year transition period from 2033 to 2036, FDA does not intend to object to the continued use of 10-digit NDCs on drug labels. FDA has also noted that the rule does not change NDC formats used for other purposes, including the HIPAA standard 11-digit format used for reimbursement, meaning systems may need to transact across multiple formats simultaneously.

While this NDC shift can be compared to a Y2K-style moment for the pharma industry, the key difference is that it’s not just up to individual stakeholders to update their own systems. This requires simultaneous, external coordination across the entire supply chain, and while systems won’t fail outright, there is a lot at stake. Errors can disrupt reimbursement, distribution, and even retail availability. Any system that touches an NDC must evolve its barcode scanners, point-of-sale systems, and inventory and dispensing systems, or the industry will risk widescale fragmentation.

The operational challenges for implementation can be separated into the two main drug streams: prescription drugs and over-the-counter drugs. For prescription drugs, there is a need for industry-wide technical specifications to ensure systems can transact across multiple NDC formats during the transition period. This raises a series of open questions: who defines this standard, how is it communicated, and who is leading the charge? Without clear alignment, even small inconsistencies can create downstream disruption.

On the other hand, over-the-counter drugs also present a major risk area. The FDA has indicated that linear or nonlinear barcode formats may be used to encode the NDC if they conform to recognized standards, and that a 2D data matrix barcode can encode the 12-digit NDC for products subject to DSCSA requirements. Even so, broader implementation across over-the-counter products and non-pharmacy retail environments may add complexity for stakeholders that need to update scanning, labeling, and data systems.

There are seven years before this rule takes effect. While this may seem like a long time, the scale of this shift leaves little room for delay. The pharma industry must act now to effectively coordinate in time. Without early alignment across entities, the industry risks fragmentation and the kind of disruption many feared during Y2K.

For manufacturers, preparation begins with a clear understanding of impact. This starts with conducting a comprehensive impact assessment of SKUs, labeling formats, and downstream system dependencies. The larger the portfolio of SKUs, the more time it will take to inventory. From there, organizations can begin planning for updates, which is where the true challenge begins.

The industry has already demonstrated its ability to align on major operational changes through DSCSA, where wholesalers led the charge for manufacturers and dispensers toward the implementation of serialized drug tracking and standardized barcodes. The key difference with NDC is that this transition introduces a broader, more fragmented set of stakeholders

Success will hinge on aligning standardization and leadership efforts.

Overall, this must be treated as more than a labeling shift or compliance exercise to avoid any operational and commercial disruptions or worse, a Y2K-moment for pharma. To effectively bridge the gap between legacy 10-digit data and the new 12-digit standard, this must be approached as a full-scale system transformation, with widescale coordination across the entire supply chain.

US Food and Drug Administration. National Drug Code Format

https://www.fda.gov/drugs/electronic-drug-registration-and-listing-system-edrls/national-drug-code-format

Food and Drug Administration. Revising the National Drug Code Format and Drug Label Barcode Requirements

https://www.federalregister.gov/documents/2026/03/05/2026-04368/revising-the-national-drug-code-format-and-drug-label-barcode-requirements

Articles

FDA finalized a uniform 12-digit National Drug Code (NDC) (6-4-2) to replace today’s variable 10-digit formats, effective March 7, 2033, followed by a 2033–2036 transition. The change extends well beyond relabeling, forcing barcode evolution because linear codes cannot accommodate 12 digits, accelerating reliance on 2D data matrix—especially challenging in OTC and non-pharmacy retail. Concurrent coexistence of 10-, 11- (HIPAA), and 12-digit formats heightens interoperability risk, demanding supply-chain-wide technical alignment to avoid reimbursement, distribution, and availability disruptions.

FDA's 12-digit NDC rule demands industry-wide barcode, labeling, and data system overhauls, manufacturers must act now to avoid pharma's Y2K moment.