Which part of the NDC number identifies the specific drug strength and dosage form?
Answer choices
- AFirst segment
- BThird segment
- CLast digit
- DSecond segment
About this question
Which segment of the NDC number identifies drug strength and dosage form? The National Drug Code is commonly taught in a 5-4-2 layout with three jobs: labeler, product, and package. PTCE Order Entry questions test whether you know which segment carries strength and form — not guessing from the last digit alone.
The second segment (product code) identifies the specific strength, dosage form, and formulation. The first segment is the labeler, and the third is the package size. Technicians use these segments daily for ordering, billing, and barcode verification when catching wrong-product selections.
Reveal answer & explanationShow
Correct answer
- AFirst segment
- BThird segment
- CLast digit
- DSecond segmentCorrect
Basic rationale
The NDC 5-4-2 format uses the middle segment (Product Code) to identify the specific strength, dosage form, and formulation.
Option explanations
- A: Incorrect. The first segment identifies the manufacturer (labeler code).
- B: Incorrect. The third segment identifies package size, not drug strength or form.
- C: Incorrect. The last digit is a checksum digit used for NDC validation.
- D: Correct. The second segment (product code) identifies strength, dosage form, and formulation.
Deep Analysis
Core logic
The NDC (National Drug Code) uses a 5-4-2 format: (1) Labeler Code (first segment) = manufacturer; (2) Product Code (second segment) = specific drug, strength, and dosage form; (3) Package Code (third segment) = package size/type.
Distractor analysis
A: The first segment identifies the manufacturer/labeler, not strength or dosage form. B: The third segment identifies package size, not the drug's strength or form. C: The last digit is a checksum used for validation, not a product identifier.
Exam trap
Don't confuse 'product' with 'package.' Strength and dosage form live in the middle segment; bottle count lives in the last segment.
Memory tip
📦 M-P-P: Manufacturer (1st) → Product/strength/form (2nd) → Package size (3rd).
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