Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB2945             Geisinger Epic ID: 19116

Specimen type:
Plasma or serum
Preferred collection container:
Specimen required:
2 mL of serum or plasma; minimum 0.5 mL.

Specimen processing instructions:
Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection. 
Transport temperature:
Refrigerated (preferred) or frozen.
Specimen stability:
Refrigerated: 5 days. Frozen: 3 months.
Rejection criteria:
Stability limits exceeded.

Reference interval:
Total PSA:
60 years and above: <4.1 ng/mL
50-60 years: <3.1 ng/mL
40-50 years: <2.0 ng/mL
0-40 years: <1.4 ng/mL
Free PSA/Total PSA index: >25%
Additional information:
Specimens containing human anti-mouse antibodies may affect results.
CPT code(s):
84154, 84153
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.
Test includes:
Total PSA, with an add-on of Free PSA if total PSA is abnormally high
Roche Electrochemiluminescence Immunoassay. Patient results determined by assays using different manufacturers or methods may not be comparable.
Clinical significance:
In patients where total PSA is high, those with prostate cancer tend to have a lower percent of free PSA than those with benign prostatic hypertrophy (BPH). Therefore, the percent free PSA may aid in determining the likelihood of prostate cancer.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 02/13/2024

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Megan Woodruff
Frequency: Daily
Performed STAT? No
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