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Prostate-specific Antigen (PSA), Free:Total Ratio (Serial Monitor)

CPT: 84153; 84154
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Special Instructions

The account must submit the patient's Social Security number for serial monitoring. Values obtained with different assay methods should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor each patient's course of therapy. For a complete test description, see Prostate-specific Antigen (PSA), Free:Total Ratio [480947].

This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.


Expected Turnaround Time

1 - 3 days


Related Documents


Specimen Requirements


Storage Instructions

Maintain specimen at room temperature.


Stability Requirements

Temperature

Period

Room temperature

3 days

Refrigerated

3 days

Frozen

14 days

Freeze/thaw cycles

Stable x3


Test Details


Limitations

In this profile, free PSA is performed and percent free PSA is calculated, regardless of the concentration of total PSA. The interpretive guidelines provided for percent free PSA are based on a population of men with normal digital rectal exam (DRE) and total PSA between 4.0 and 10.0 ng/mL.


LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
480780 PSA Total+% Free (Serial) 010334 Prostate Specific Ag, Serum ng/mL 2857-1
480780 PSA Total+% Free (Serial) 480782 PSA, Free ng/mL 10886-0
480780 PSA Total+% Free (Serial) 480799 % Free PSA % 12841-3
480780 PSA Total+% Free (Serial) 511958 PDF 51969-4
480780 PSA Total+% Free (Serial) 010334 Prostate Specific Ag, Serum ng/mL 2857-1
480780 PSA Total+% Free (Serial) 480782 PSA, Free ng/mL 10886-0
480780 PSA Total+% Free (Serial) 480799 % Free PSA % 12841-3
480780 PSA Total+% Free (Serial) 511958 PDF 51969-4
480780 PSA Total+% Free (Serial) 010334 Prostate Specific Ag, Serum ng/mL 2857-1
480780 PSA Total+% Free (Serial) 480782 PSA, Free ng/mL 10886-0
480780 PSA Total+% Free (Serial) 480799 % Free PSA % 12841-3
480780 PSA Total+% Free (Serial) 511958 PDF 51969-4
480780 PSA Total+% Free (Serial) 010334 Prostate Specific Ag, Serum ng/mL 2857-1
480780 PSA Total+% Free (Serial) 480782 PSA, Free ng/mL 10886-0
480780 PSA Total+% Free (Serial) 480799 % Free PSA % 12841-3
480780 PSA Total+% Free (Serial) 511958 PDF 51969-4

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CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf