Pharmaceutical Central Number
Glossary Page
The Pharmaceutical Central Number (PZN) is assigned by the Information Center for Medicinal Products (IFA) [1] for all products available in pharmacies (according to §25 of the Pharmacy Operation Regulation). In addition to providing a unique identification for a packaged finished medicinal product (supplier, dosage form, strength, package size), the PZN also serves as the basis for ordering and billing of medications in the healthcare sector.
http://www.pruefziffernberechnung.de/P/PZN.shtml