Test Details
Mnemonic
RBCF
Ordering Code
1000773
CPT-4 Code(s)
82747
Specimen Information
Patient Preparation
Fasting preferred
If specimen is submitted frozen, please provide hematocrit result. A hematocrit collected within
24 hours of the RBCF collection is acceptable if the patient has not received a transfusion or
experienced excessive bleeding in that 24 hour period.
Please note: Methotrexate and leucovorin may interfere with assay.
If specimen is submitted frozen, please provide hematocrit result. A hematocrit collected within
24 hours of the RBCF collection is acceptable if the patient has not received a transfusion or
experienced excessive bleeding in that 24 hour period.
Please note: Methotrexate and leucovorin may interfere with assay.
Collect
Lavender EDTA
Specimen Preparation
Send 3.0 mL whole blood (entire sample) in the original collection tube.
Alternate Specimen
Whole blood in K2EDTA (pink top) tubes are acceptable.
Minimum Volume
1.0 mL (mixed well)
Transport Temperature
Refrigerated
Rejection Criteria
Lipemia, clotted whole blood, plasma, serum
Stability
Room temperature: 8 hours
Refrigerated: 72 hours
Frozen: 60 months
Refrigerated: 72 hours
Frozen: 60 months
Methodology
Chemiluminescence
Reference Range
280 - 791 ng/mL
Performing Laboratory
Warde Medical Laboratory