Test Details
Mnemonic
METHL
Ordering Code
1755020
CPT-4 Code(s)
80320 (84600)
Specimen Information
Collect
Gray sodium flouride. Do not remove cap from collection tube.
Specimen Preparation
Send 5.0 mL whole blood. Do not open container. Specimens in aliquot containers must be sealed immediately after transferring to minimize exposure to air.
Alternate Specimen
Serum from Red top, green sodium or lithium heparin.
Minimum Volume
1.0 mL
Transport Temperature
Refrigerated
Rejection Criteria
Serum separator tube (SST) and tubes containing gel
Stability
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: Whole Blood: Unacceptable; Plasma/serum/urine: 30 days
Refrigerated: 7 days
Frozen: Whole Blood: Unacceptable; Plasma/serum/urine: 30 days
Methodology
Gas Chromatography/Flame Ionization Detection
Reference Range
Decision level: 10 mg/dL
Toxic: >20 mg/dL
Toxic: >20 mg/dL
Performing Laboratory
Warde Medical Laboratory
New York DOH Approval Status
No