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Pregnancy Test/Serum
Test CodePREG
Alias/See Also
Serum Pregnancy Test
CPT Codes
84703
Preferred Specimen
Serum (gold top tube)
Minimum Volume
0.5 mL
Other Acceptable Specimens
Lithium Heparin Plasma (green top tube)
Transport Container
Serum (gold top) or Lithium Heparin Plasma (green top) Tube
Transport Temperature
Room Temperature or Refrigeration
Specimen Stability
Room Temperature - 1 day; Refrigerated - 5 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Turbidity, Quantity Not Sufficient, IV contamination
Methodology
Chemiluminescence
Setup Schedule
Daily upon receipt
Report Available
Upon completion of analysis
Limitations
Turbidity of serum or plasma (observable after centrifugation) will interfere with testing.
Reference Range
Reported as Negative, Positive, or Indeterminent for pregnancy. For Indeterminent results, repeat testing in 48 hours to confirm pregnancy.
Clinical Significance
The Serum Pregnancy Test is a qualitative test that measures the concentration of human chorionic gonadotropin in serum and translates the concentration to a result of Negative, Positive, or Indeterminent for pregnancy. HCG is a hormone produced in the body during pregnancy.