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Test ID FL Fluoride, Plasma

Useful For

Assessing accidental fluoride ingestion


Monitoring patients receiving sodium fluoride for bone disease or patients receiving voriconazole therapy

Method Name

Ion-Selective Electrode (ISE)

Reporting Name

Fluoride, P

Specimen Type

Plasma Heparin

Specimen Required

Collection Container/Tube: Green top (sodium heparin)

Submission Container/Tube: Plastic vial

Specimen Volume: 3 mL

Collection Instructions: Centrifuge and aliquot plasma into a plastic vial. Glass tubes are not acceptable.

Specimen Minimum Volume

1.2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Heparin Refrigerated (preferred) 14 days
  Ambient  14 days
  Frozen  14 days

Reference Values

<4.1 mcmol/L

Day(s) Performed


Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FL Fluoride, P 14726-4


Result ID Test Result Name Result LOINC Value
8641 Fluoride, P 14726-4

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

Report Available

2 to 8 days

NY State Approved