CPT/HCPCS
84153
Order Code
CH141
Turnaround Time
24-48 hours
Test Includes
Free PSA
Specimen Requirements
Specimen Source
Serum
Transport Container
(Specimen Container)
(Specimen Container)
SST (Tiger Top)
Preferred Specimens
Serum
Collection Instructions
(Transport Temperature)
(Transport Temperature)
Transport Refrigerated (cold packs)
Specimen Stability
| Temperature | Period |
|---|---|
| Room temperature | Unacceptable |
| Refrigerated | 5 days |
| Frozen | 30 days |
Test Details
Methodology
Immunoassay (IA
Clinical Significance
The percentage of measured prostate-specific antigen (PSA) existing in the free form (free:total PSA ratio) is useful in assessing the risk of prostate cancer in patients with borderline or moderately increased total PSA (4.0-10.0 ng/mL) and has been used to help select men who should have follow-up prostate biopsy.
Reference Ranges
≤ 0.86 ng/mL
