When submitting NDCs on professional/ancillary electronic (ANSI 837P) or paper (CMS-1500) claims, you must enter the NDC on your claim in the 11-digit billing format (no spaces, hyphens or other characters). If the NDC on the package label is less than 11 digits, you must add a leading zero to the appropriate segment to create a 5-4-2 configuration. See the examples below:

Add leading zero depending on format of NDC and remove hyphens

4-4-2 (xxxx-xxxx-xx) 0xxxxxxxxxx

5-3-2 (xxxxx-xxx-xx) xxxxx0xxxxx

5-4-1 (xxxxx-xxxx-x) xxxxxxxxx0x