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St. John Health System
Lab Catalog


Index:

Aspartate Transaminase (AST)

Order Name AST
Test Number: 2004800
Revision Date 04/26/2021
Test Name Methodology LOINC Code
Aspartate Transaminase (AST)
Enzymatic 1920-8 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Alternate 1 1 mL (0.5) Serum Clot Activator SST Refrigerated
Instructions Specimen Stability: Ambient 4 days. Refrigerated 7 days, Frozen 12 weeks
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1-2 days  
Clinical Use Useful in the diagnosis of liver disease. 
CPT Code(s) 84450
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Chemistry