M119 remark code

Remittance advice remark code M119. Remark codes add detail to the reason code on the same claim line.

Missing or invalid NDC

Unofficial reference. This is our own plain-English explanation, not the official code text. Payer rules differ. Verify with the payer and the official X12 code list. AlphaPrefix is not affiliated with X12, CMS or any payer. Data last updated Nov 11, 2026.

What M119 means

The National Drug Code for the drug on this line is missing, incomplete, invalid or no longer active.

Many payers require the NDC alongside the drug's HCPCS code. This remark says the NDC was missing, in the wrong format, not active on the date, or not matched to the billed drug.

It normally comes with reason code 16. Check the NDC qualifier, unit of measure and quantity as well as the number itself.

Common causes

• The NDC was left off a drug line that requires it.
• The NDC was entered without the right format, qualifier or unit of measure.
• The package NDC was discontinued or does not match the HCPCS code billed.

What to do next

1. Get the NDC from the actual package or vial used.
2. Check that the NDC is active and fits the HCPCS code on the line.
3. Send a corrected claim with the NDC, qualifier, unit of measure and quantity.

Related codes

• 16 (reason code) Missing information or billing error
• M20 (remark code) Missing or invalid HCPCS code
• M53 (remark code) Missing or invalid units or days