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HIT PF4 Ab (Heparin Induced Thrombocytopenia Platelet Factor 4 Antibody)

Tube Type


Test ID   LAB5324
EPIC Order
CPT Code(s)   86022
Group/Individual Test   Individual
Laboratory   Special Coagulation
Tube Station   30
Specimen Routine:   
5.0 mL red or royal blue top tube or gold top tube
Unspun - 4 hrs
Room Temp - 4 hrs
Refrigerated - NO
Frozen - 6 months
Availability Routine: 3 runs/week: Monday, Wednesday, Friday.   Sample must be received in Special Coagulation Laboratory by 6am M/W/F for same-day-testing.
  STAT: Available upon approval by Laboratory Director
Turnaround Time   1-3 Business Days
Internal Reference Testing & Outreach Handling Instructions Centrifuge, aliquot and freeze.
Reference Range Normal: <0.400

Serotonin Release Assay (SRA) will reflex with positive HIT PF4 Antibody result.

Patient should be OFF Heparin for a minimum of 8 hrs.

Reviewed by Christopher Parker on August 05, 2021

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514