Manufacturer listings are done where the product’s marketing category is: a bulk ingredient (used for APIs [Active Pharmaceutical Ingredients]) drug for further processing (product needs additional work such as packaging and/or labeling by another manufacturer before being commercially distributed) manufactured under contract (product is ready for commercial distribution by a private label distributor; note that: a private label distributor in this context can be a drug manufacturer that distributes a drug manufactured for them under contract by a different drug manufacturer) The manufacturer in this case is not necessarily the manufacturer of the drug, it can be the company that bought the drug either in bulk from the drug manufacturer and packaged and labeled it, or in packages from the packager of the drug and placed labels on the packages; the FDA includes manufacturing, packaging, and labeling in the overall manufacturing process for drugs. The NDCs in the drug product information use the manufacturer’s labeler code. See 21CFR207.41, (c)(2) for additional information.