What is NDC11 Format?

It should be noted that many National Drug Codes (NDCs) are displayed on drug packing in a 10-digit format. Proper billing of a National Drug Code (NDC) requires an 11-digit number in a 5-4-2 format. Converting National Drug Code (NDC) from a 10-digit to an 11-digit format requires a strategically placed zero, dependent upon the 10-digit format. The following table shows common 10-digit National Drug Code (NDC) formats indicated on packaging and the associated conversion to an 11-digit format, using the proper placement of a zero. The correctly formatted, additional “0” is in a bold font and underlined in the following example. Note that hyphens indicated below are used solely to illustrate the various formatting examples for the National Drug Code (NDC).

How to convert to NDC11 format:

Start with hyphenated NDC
Pad with zeroes so each segment is 5-4-2 length (total length of 11 digits)
Remove hyphens

Examples:

1234-5678-90 → 01234-5678-90 → 01234567890

12345-678-90 → 12345-0678-90 → 12345067890

12345-6789-0 → 12345-6789-00 → 12345678900

Source

See also:

Converting between 10– and 11– digit NDCs

Background National Drug Code, or NDC, numbers are 10-digit unique identifiers for human drug products marketed in the United States. Each NDC number comprises three sequential sections that describe different aspects of a drug product: Component Length Assigned by Describes Labeler code 4–5 digits FDA manufacturer, repackager, or relabeler of the product Product code 3–4 digits labeler dosage characteristics of the drug (including strength and formulation) Package code 1–2 digits labeler package type and size of the product You may have noticed that each of the different components of an NDC number is variable in length.

eddiecosma.com