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Factor IX inhibitor

Message
Performed in the Hematology Laboratory x5475, 76.
Sample MUST be drawn to minimum fill line on tube


Test Code
F9INH


CPT Codes
85335

Preferred Specimen
plasma


Minimum Volume
2, 2.7 mL. Sample MUST be drawn to minimum fill line on tube or the sample will be rejected as QNS.


Transport Container
2, Light Blue Top (Sodium Citrate), 1.8mL draw or 2.7 mL draw tubes


Transport Temperature
Room Temperature


Specimen Stability
Refrigerator Stability: 4 hours
Plasma is stable for 6 months frozen at -70 degrees C.


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, QNS, clotted


Methodology
optical/clotting

Setup Schedule
Monday-Friday 8am - 4pm


Limitations
If F-IX activity levels are greater than 25%, the assay will not be performed.


Reference Range
<0.5 Bethesda units


Clinical Significance


Patients with Hemophilia B may develop an inhibitor to Factor IX.






The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.