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22638 Folate, RBC

Folate, RBC
Test Code: FOLRBC
Synonyms/Keywords
RBC Folate, FOL-WB, FOL-HCT, Folate, Erythrocytes ​
Test Components
Hematocrit, Folate​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Whole Blood​ (2) EDTA Lavender Top Tube (LTT)​ EDTA Pink Top Tube (PTT)​ 3.0 mL​ 0.5 mL​ ​
Collection Processing Instructions
Send one specimen tube to Hematology for a hematocrit. Thoroughly mix the second specimen tube by inversion and freeze if not analyzed within four hours. EDTA whole blood is the only acceptable specimen type.
 
If sending to another testing location: Perform a hematocrit on the specimen before freezing and submit the hematocrit result with the frozen specimen. Alternately: submit an additional non-frozen EDTA whole blood sample (LTT) for hematocrit measurement at Marshfield Laboratories. Label specimens appropriately. Note: if only a frozen sample is submitted, and no hematocrit available, the performing department will use a 'standard' hematocrit value to determine the RBC folate.​
 
High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay. It is recommended that patients refrain from consuming any multivitamin or supplement containing biotin for at least 72 hours prior to collection of a blood sample.
Specimen Stability Information
Specimen Type Temperature Time
Whole Blood​ Ambient​ 4 hours​
Refrigerated​ 4 hours​
Frozen​ 2 months​
Interference
​High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay.
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Friday​ 1 day​ Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
Reference Range Information
Performing Location Reference Range
Marshfield​ 280-791 ng RBC/mL packed cells​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82747 ​ ​ ​ ​ ​
Synonyms/Keywords
RBC Folate, FOL-WB, FOL-HCT, Folate, Erythrocytes ​
Test Components
Hematocrit, Folate​
Ordering Applications
Ordering Application Description
​Centricity ​Folate, Erythrocytes (RBC Folate)
​Cerner ​RBC Folate
​COM ​Folate, RBC    
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Whole Blood​ (2) EDTA Lavender Top Tube (LTT)​ EDTA Pink Top Tube (PTT)​ 3.0 mL​ 0.5 mL​ ​
Collection Processing
Send one specimen tube to Hematology for a hematocrit. Thoroughly mix the second specimen tube by inversion and freeze if not analyzed within four hours. EDTA whole blood is the only acceptable specimen type.
 
If sending to another testing location: Perform a hematocrit on the specimen before freezing and submit the hematocrit result with the frozen specimen. Alternately: submit an additional non-frozen EDTA whole blood sample (LTT) for hematocrit measurement at Marshfield Laboratories. Label specimens appropriately. Note: if only a frozen sample is submitted, and no hematocrit available, the performing department will use a 'standard' hematocrit value to determine the RBC folate.​
 
High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay. It is recommended that patients refrain from consuming any multivitamin or supplement containing biotin for at least 72 hours prior to collection of a blood sample.
Specimen Stability Information
Specimen Type Temperature Time
Whole Blood​ Ambient​ 4 hours​
Refrigerated​ 4 hours​
Frozen​ 2 months​
Interference
​High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay.
Test Components
Hematocrit, Folate​
Reference Range Information
Performing Location Reference Range
Marshfield​ 280-791 ng RBC/mL packed cells​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Friday​ 1 day​ Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82747 ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.