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

Tube Types = Red or Royal Top

Tube Type

Test ID   LAB5324
EPIC Order
   HEPARIN PF4 ANTIBODY
CPT Code(s)   86022
Group/Individual Test   Individual
Laboratory   Special Coagulation
Tube Station   30
Specimen Routine:   
5.0 mL blood/red plain or navy blue tube
Stability
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
Comment

Serotonin Release Assay (SRA), send out test, will reflex with positive HIT PF4 Antibody result.

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

Reviewed by J. Carr on January 13, 2026

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