Aspartate Aminotransferase (AST) (1002)

Create a Free Account to View Prices

CPT Code:


Test Type: 1.0 mL Serum or Plasma kit based
Stability Time:


Refrigerated:  7 days

Reference Range:
  • Optimal: <40 U/L
  • Borderline: 40 – 120 U/L
  • Increased Risk: >120 U/L
  • Alert: >240 U/L


AST is an enzyme that is widely distributed in tissue, mainly hepatic, cardiac, muscle, and kidney.




Elevated serum levels indicate damage to the liver, cardiac, muscle, and kidney tissues that may be caused by existing conditions or medications.

Collection Details:

Collection Instructions:

Preferred Specimen

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

Alternate Specimen

1.0 mL EDTA plasma (0.5 mL minimum) collected in plasma separator tube (Pearl Top)

Transport Temperature

Refrigerated (ship on frozen cold packs)


Refrigerated:  7 days