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22639 Folate, Serum

Folate, Serum
Test Code: FOL
Synonyms/Keywords
Folate- Folic Acid​
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​ Serum​ Serum Separator Tube (SST) ​Red Top Tube (RTT)​ 0.5 mL​ 0.4 mL​ 0.3 mL​
Collection Processing Instructions
​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
Serum​ Ambient​ 4 hours​
Refrigerated​ 4 hours​
Frozen​ 2 months​
Rejection Criteria
> Trace hemolysis
Interference

Human Anti-Murine Antibodies (HAMA) may develop leading to test interference in patients receiving murine-based agents for chemotherapy or tumor-imaging studies. Likewise, Fluorescein used in retinal angiography will interfere.​

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
Diagnostic Treatment Center​ ​Monday through Sunday​ ​Less than 2 hours​ ​Homogenous Sandwich Chemiluminescent Immunoassay/Siemens Dimension Vista
Marshfield​ Monday through Sunday​ Less than 2 hours​
 Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
Reference Range Information
Performing Location Reference Range
Diagnostic Treatment Center >= 4.0 ng/mL  ​
​Marshfield ​>= 3.4 ng/mL
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82746​ ​ ​ ​ ​
Synonyms/Keywords
Folate- Folic Acid​
Ordering Applications
Ordering Application Description
​Centricity ​Folate, (Folic Acid)
​Cerner ​Folate Level
​COM ​Folate- Folic Acid
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​ Serum​ Serum Separator Tube (SST) ​Red Top Tube (RTT)​ 0.5 mL​ 0.4 mL​ 0.3 mL​
Collection Processing
​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
Serum​ Ambient​ 4 hours​
Refrigerated​ 4 hours​
Frozen​ 2 months​
Rejection Criteria
> Trace hemolysis
Interference

Human Anti-Murine Antibodies (HAMA) may develop leading to test interference in patients receiving murine-based agents for chemotherapy or tumor-imaging studies. Likewise, Fluorescein used in retinal angiography will interfere.​

High doses of exogenous biotin (also termed Vitamin B7, Vitamin H or Coenzyme R) may interfere with this assay.
Reference Range Information
Performing Location Reference Range
Diagnostic Treatment Center >= 4.0 ng/mL  ​
​Marshfield ​>= 3.4 ng/mL
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center​ ​Monday through Sunday​ ​Less than 2 hours​ ​Homogenous Sandwich Chemiluminescent Immunoassay/Siemens Dimension Vista
Marshfield​ Monday through Sunday​ Less than 2 hours​
 Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82746​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.