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Thrombopoietin (TPO)
MessageNote: Cytokine levels may demonstrate diurnal variation. Recommend cytokine levels be determined at the same time of day for improved longitudinal comparison. Immediate Specimen Processing: Centrifuge and transfer serum to a screw cap transfer tube before freezingAmbulatory Transport Temperature to Inova Central Lab: FrozenSpecimen Stability: 30 days
Test Code
LAB3384 TPO
Alias/See Also
TPO
CPT Codes
83520
Includes
Note: Cytokine levels may demonstrate diurnal variation. Recommend cytokine levels be determined at the same time of day for improved longitudinal comparison.@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@
Instructions
Preferred Testing Volume: 1.0 mL SerumMinimum Testing Volume: 0.5 mL Serum Transport Temperature: FrozenStability: Ambient: N/A Refrigerated : N/A Frozen -20 C: 30 Days Frozen -70 C: 7 MonthsCauses for Rejection: Gross lipemiaGross icterusPerforming Lab: Quest SJC
Report Available
33-Days
Clinical Significance
1230170918
Last Updated: May 18, 2026