NDC code and NDC unit of measure in CMS 1500 form

24A (shaded top)
NDC code
Required if appropriate
Enter N4 followed by the 11 digit NDC code

24B (shaded top)
NDC Unit of measure
Required if NDC code is present in 24A
Enter appropriate 2 digit NDC unit of measure
Valid values:
F2 – International Unit
GR – Gram
ME – Milligram
ML – Milliliter
UN – Unit

24C-D (shaded top)
NDC number of Units
Required if NDC code is present in 24A
Enter the actual metric decimal quantity (units) administered to the patient. If reporting a fraction of a unit, use the decimal point. Nine numbers may precede the decimal point and three numbers may follow the decimal.

24D
(shaded top modifier section)
NCD Unit Price
Required if NDC code is present in 24A
Enter unit price corresponding to NDC code.