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Test Code FOL Folate, LAB69

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Green-top (lithium heparin) tube

Acceptable: Gold-top serum gel tube or plain red-top tube

Specimen Volume: 0.2 mL of  plasma or serum

Stability: Separated specimens should be analyzed immediately or kept at 2 – 8°C

                and analyzed within 8 hours. For longer storage, samples may be frozen at -20°C. 

                Protect samples from light. 

Collection Instructions: Fasting specimen is preferred. Protect specimen from light to prevent deterioration. If there is a delay in transport of >8 hours or if mailing time exceeds 8 hours, send specimen frozen in plastic vial.




Reference Values

>3.1 ng/mL

Useful For

Folate levels in both serum and red blood cells are used to assess folate status. The serum folate level is an indicator of recent folate intake.  A folate deficiency can lead to megaloblastic anemia and ultimately to severe neurological problems.

Day(s) Test Set Up

Monday through Sunday


Chemiluminescence/Homogenous Competitive

Test Classification and CPT Coding