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Heparin-Induced Thrombocytopenia Evaluation

Order Code: 5509

Test Information

Heparin-Induced Thrombocytopenia Evaluation is a reflexive algorithm. IgG-PF4 ELISA is always performed. If ELISA results are non-negative a Serotonin Release Assay will be performed.

Sample Requirements


Additional Sample Requirements

Sample should be spun down and taken off the clot. Sample must be received within 7 days of draw date if refrigerated. Older serum samples are acceptable if they have been frozen. Room temperature samples are not acceptable.

Shipping Information

Refrigerated (If already frozen, send on dry ice)

Requested Volume

5 ml

Minimum/Pediatric Volume

1 ml

CPT Codes

PF4: 86022, SRA: 86022


Platelet Factor 4 (PF4) ELISA and if indicated Serotonin Release Assay (SRA)

Turnaround Time

1-3 days

Test Schedule

Performed 6 days per week (Monday through Saturday)

New York State Approval



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