Specimen Collection Manual and Test Catalog
AST
Geisinger Epic Procedure Code: LAB1792 Geisinger Epic ID: 14437SPECIMEN COLLECTION
Specimen type:
Plasma or Serum
Preferred collection container:
Specimen required:
2 mL of serum or plasma; minimum 0.2 mL.
SPECIMEN PROCESSING
Processing instructions:
Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.
Transport temperature:
Refrigerated (preferred). Room temperature specimen also acceptable.
Specimen stability:
Plasma (PST): Room temperature or refrigerated: 12 hours.
Serum (SST): Room temperature: 4 days. Refrigerated: 7 days. Frozen: 3 months.
Rejection criteria:
Stability limits exceeded,
TEST DETAILS
Reference interval:
CPT code(s):
84450 0-10 days: 47-150 U/L
11 days - < 4 yr: <77 U/L
4 yr - < 7 yr: <53 U/L
7 yr - < 13 yr: <48 U/L
13 yr to <18 yr: <44 U/L
> 18 yr: Male 10-50 U/L. Female 10-35 U/L
Note: The billing party has sole responsibility for CPT coding. Any
questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Aspartate aminotransferase (AST).
Methodology:
Enzymatic
Synonyms:
SGOT
Clinical significance:
Elevated in alcoholism, cirrhosis, hepatitis, drug therapy, and biliary disease. Depressed in uremia, B6 deficiency, and drug therapy.
Doctoral Director(s):
Review Date:
12/27/2024
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC
Performing Locations