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Test ID PSAU Prostate-Specific Antigen (PSA) Ultrasensitive, Serum

Useful For

Monitoring disease after radical prostatectomy


This test should not be used for initial prostate cancer screening.

Method Name

Electrochemiluminescent Immunoassay (ECLIA)

Reporting Name

PSA, Ultrasensitive, S

Specimen Type


Ordering Guidance

Free prostate-specific antigen (PSA) can be added on within 72 hours of performing this test. Specimen must have been shipped frozen.


If both free and total PSA results are desired, order PSAFT / Prostate-Specific Antigen (PSA), Total and Free, Serum.

Additional Testing Requirements


Necessary Information

Include patient's age.

Specimen Required

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.

Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen (preferred) 180 days
  Refrigerated  14 days
  Ambient  7 days

Reference Values


Age (years)

PSA upper limit (ng/mL)














Females: Not applicable

Day(s) Performed

Monday through Saturday

Report Available

1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
PSAU PSA, Ultrasensitive, S 35741-8


Result ID Test Result Name Result LOINC Value
PSAU PSA, Ultrasensitive, S 35741-8