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Test Code AST AST, LAB131


Rate Reaction

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Green-top (lithium heparin) tube

Acceptable: Gold-top serum gel tube or plain, red-top tube

Specimen Volume: 0.1 mL of plasma or serum

Stability: Samples can be kept at 2 – 8°C and analyzed within 7 days. For longer storage, samples may be frozen at -20 °C or colder for up to 1 month.

Note:  Venipuncture should occur prior to sulfasalazine and/or sulfapyridine administration due to the potential for falsely depressed results.

Reference Values

7-40 U/L

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


Useful For

Elevated levels of the transaminases (AST) are helpful in diagnosing and  can signal myocardial infarction, hepatic disease, muscular dystrophy, and organ damage.