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HelpTest Code METHOTREXATE Methotrexate
Additional Codes
St. Luke's Compendium Code (Iatric): L906.2625
Performing Laboratory
Essentia SMDC Clinical Laboratory
Methodology
Fluorescence Polorization Immunoassay
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Specimen Type: Plasma
Container/Tube: Light-green top (lithium heparin gel)
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
1. Separate plasma from cells within 2 hours of draw.
2. If plunger filters are used, immediate removal of serum
is indicated unless an air gap can be created between the device
and specimen.
Additional Information:
1. Protect specimen from light.
2. Label specimen appropriately (plasma).
Alternate:
Specimen Type: Serum
Container/Tube: Serum gel
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
1. Separate serum from cells within 2 hours of draw.
2. If plunger filters are used, immediate removal of serum is indicated unless an air gap can be created between the device and specimen.
Additional Information:
1. Protect specimen from light.
2. Label specimen appropriately (serum).
Refrigerate 24 hours/Frozen OK/Ambient NO
Test Classification and CPT Code Information
83520
Reference Range
0-0.10 umol/L
Non-toxic drug concentration after 48 hours: <0.1 umol/L
St. Luke's Laboratory Processing Note
This test should be forwarded to the performing laboratory STAT