1-4 days after setup at PeaceHealth Laboratories’ reference lab.
CPT Code:
86340-90
Specimen Collection Details
Collection:
One 7.5 mL serum separator tube (SST).
Handling:
Allow to clot, centrifuge and separate serum from cells and pour into a plastic vial. Freeze.
Stability:
8 hours ambient, 48 hours refrigerated, or 1 month frozen.
Standard Volume:
1 mL serum.
Minimum Volume:
150 µL serum.
Transport:
Frozen on dry ice.
Comments:
High serum concentrations of vitamin B12 (cobalamin) cause false positive. For patients undergoing B12 therapy, wait 48 hours to one week after injection before collection of specimen.