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AST
Test CodeAST
Alias/See Also
SGOT
CPT Codes
84450
Preferred Specimen
0.8 mL of whole blood (0.4 mL of serum/plasma)
Minimum Volume
Minimum: 0.4 mL of whole blood (0.2 mL of serum/plasma)
Transport Container
Serum separator (gold top) or for inpatients/MSTI/ED only Lithium Heparin (green or mint top)
Transport Temperature
Room Temperature
Specimen Stability
Room Temperature: 3 days
Refrigerated: 1 week (serum only)
Frozen: 3 months at -18 C
Refrigerated: 1 week (serum only)
Frozen: 3 months at -18 C
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, improperly centrifuged specimens (due to platelet interference)
Methodology
Multiple Point Rate
Setup Schedule
Daily
Report Available
Inpatient turn around time: Routine 3 hours, stat 30 minutes. Outpatient specimens received by noon will be reported by 4:30 p.m. Specimens received after noon will be reported by the next morning.
