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HelpTest Code PSATF Prostate-Specific Antigen (PSA), Total and Free, Serum
Methodology
Immunoenzymatic Assay
Performing Laboratory
Munson Healthcare Laboratories
Specimen Requirements
Specimen must arrive within 24 hours of draw.
Container/Tube: Gold-top serum gel tube
Specimen Volume: 0.5 mL of serum
Transport Temperature: Refrigerate
Collection Instructions: Forward promptly.
Note: Medicare frequency limitations exist for this test in addition to diagnosis requirements. Click on link for list of medically necessary diagnoses: http://www.munsonhealthcare.org/medical-necessity. See Advance Beneficiary Notice of Noncoverage (ABN) form in Special Instructions.
Reference Values
None available for PSA, free. PSA, free is reported as a percentage of PSA, total, the following reference ranges apply to this ratio:
About 25% of asymptomatic men older than 50 years and PSA values of 4.0-10 ng/mL have prostate cancer, compared with about 12% for those with PSA values of 2.0-3.9 ng/mL. Free PSA can help classify these men into subgroups with higher or lower cancer rates:
| Free/Total Ratio | Cancer Rate | |
|
PSA 4.0-10 ng/mL |
<0.10 | >40% |
| >0.25 | <10% | |
| PSA 2.0-3.9 ng/mL | <0.10 | >30% |
| >0.18 | <10% |
Serum markers are not specific for malignancy, and values may vary by method.
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
84153-PSA, total
84154-PSA, free