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Test Code FPORC Serotonin Release Assay, Unfractionated Heparin

Important Note

This test is only ordered on patients who are on Unfractionated Heparin (UFH)

Additional Codes

Mayo Code
Epic Code
Sunquest Code


Specimen Required

Specimen Type: Serum

Container/Tube: Red/ SST acceptable

Specimen Volume: 5 mL

Collection Instruction: Draw blood in a plain, red-top tube, serum gel tube is acceptable. Spin down and remove serum from clot. Ship 5 mL of serum refrigerated in a plastic vial.


Note: Date of birth required.

Method Name

Serotonin Release Assay (SRA)

Reporting Name

Unfract. Heparin Dep. Platelet Ab

Specimen Type


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days

Reject Due To

Gross hemolysis Reject
Gross lipemia NA
Gross icterus NA

Reference Values

An interpretive comment included with results.


Day(s) Performed

Monday through Saturday

Report Available

1 to 8 days

Performing Laboratory

Versiti Wisconsin, Inc.

Test Classification

This test was developed and its performance characteristics determined by Versiti Wisconsin, Inc. It has not been cleared or approved by the US Food and Drug Administration. This test is used for clinical purposes. It should not be regarded as investigational or for research. This laboratory is certified under the Clinical Laboratory Improvement Amendments (CLIA) as qualified to perform high complexity clinical laboratory testing.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FPORC Unfract. Heparin Dep. Platelet Ab 50736-8


Result ID Test Result Name Result LOINC Value
Z0123 unfractionated heparin Low Dose 50728-5
Z0124 unfractionated heparin High Dose 50727-7
Z0125 unfractionated heparin Result 50734-3