SPECIMEN REQUIREMENTS UPDATE
Folic Acid, RBC
Order Code: RBCF
Fee Code: 23329 (CPT 82747)
Reference Laboratory: Warde RBCF
Warde Medical Laboratory will update the specimen collection and handling requirements for the Folic Acid, RBC assay effective June 24, 2025. A hematocrit result will be required with all test orders. MLabs will add label text to the RBCF that reads Recent result for HCT:_____.
Collection Instructions: Collect specimen in a lavender top (EDTA) tube. Freeze and send intact whole blood (minimum 1 mL) in the original collection tube; do not spin or aliquot. A hematocrit result is required. Provide a hematocrit from this collection with the sample submission. A hematocrit collected within 24 hours of the RBCF collection is also acceptable if the patient has not received a transfusion or experienced excessive bleeding in that 24-hour period.