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822: Aspartate Aminotransferase (AST) Print View
AST S  view ref range  U/L 

PRIMARY
1 Serum 1 (0.5) mL   Room Temperature - 4 Day(s)/Refrigerated - 7 Day(s)/Frozen - 5 Day(s)  
ALTERNATE
  Plasma Heparinized 1 (0.5) mL   Frozen - 5 Day(s)/Room Temperature - 4 Day(s)/Refrigerated - 7 Day(s)  

AST is widely distributed throughout the tissues with significant amounts being in the heart and liver. Lesser amounts are found in skeletal muscles, kidneys, pancreas, spleen, lungs and brain. Injury to these tissues results in the release of the AST enzyme to general ciculation. In myocardial infarction, serum AST may begin to rise within 6-8 hours after onset, peak within two days and return to normal by the fourth or fifth day post infarction. An increase in serum AST is also found with hepatitis, liver necrosis, cirrhosis and liver metastasis.

Centrifuge serum or plasma specimens within 1 hour of collection,
transfer serum or plasma to a sterile, plastic, screw-capped
vial(s), and ship at room temperature.
Setup Schedule
Monday-Saturday

Reported (Analytical Time)
Same day

CPT Code
84450

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Reject criteria: Hemolysis; Anticoagulants other than heparin






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