Apolipoprotein B (ApoB) (302)

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CPT Code:


Test Type: 1.0 mL Serum Kit Based
Stability Time:

Refrigerated: 8 days

Reference Range:
  • Optimal: <80 mg/dL
  • Borderline: 80–120 mg/dL
  • Increased Risk: >120 mg/dL


ApoB is a protein produced in the liver and intestine that provides structure to triglyceride (TG) carrying atherogenic lipoprotein particles. Each particle carries only one apoB protein. Thus, apoB is a direct measure of the number of atherogenic particles in the bloodstream. ApoB is also a surrogate marker for LDL particle concentration or LDL particle number since LDL comprises about 90% of the atherogenic lipoprotein particles.


  • Very low-density lipoproteins (VLDL)
  • Intermediate-density lipoproteins (IDL)
  • Low-density lipoproteins (LDL)
  • Lp(a)
  • Chylomicrons



Collection Details:

Collection Instructions:

1.0 mL serum (0.5 mL minimum) collected in serum separator tube (SST/Tiger Top)

Refrigerated (ship on frozen cold packs)