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Test Code PSATF PSA, Total and Free

Performing Laboratory

Hunterdon Medical Center Laboratory

Useful For

  • The ratio of Free PSA to Total PSA is useful in assessing the risk of prostate cancer.
  • The PSA Ratio is indicated when the Total PSA is between 4.00-10.00 ng/mL.

Test Includes

  • Total PSA
  • Free PSA
  • PSA Ratio, if indicated

Specimen Requirements

 

Container/Tube  
Acceptable  PST (Li Hep) Gel- Mint Green Top
Acceptable  SST
Specimen Volume  3.0 mL
Minimum Volume  1.0 mL

 

Specimen Type

Plasma/Serum

Specimen Transport Temperature

Ambient

Specimen Stability

 

Specimen Temperature Time Frame
Plasma Refrigerated 2-8°C 5 days
Serum-gel tube Refrigerated 2-8°C 5 days

Updated June 2020 

Day(s) Test Set up

Monday Through Sunday

Reference Values

  • PSA Ratio performed if Total PSA is between 4.00 and 10.00 ng/mL
  • Test results cannot be interpreted as absolute evidence of the presence or absence of malignant disease.
Free PSA/Total PSA Ratio Prostate Cancer Risk*
  * Dependent on age
< or=0.10 49-65%
>0.25

9-16%

Methodology

ECLIA: Electrochemiluminescence immunoassay

CPT Code

 

Test CPT
Total 84153
Free 84154

Loinc Code

 

Test Loinc
Total 2857-1
Free 10886-0
Ratio 12841-3