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St. John Health System
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Index:

Methotrexate Level

Order Name METHOTREX
Test Number: 4000560
Revision Date 02/24/2022
Test Name Methodology LOINC Code
Methotrexate Level
 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 4.0mL ( 0.5mL) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Alternate 1 4.0mL ( 0.5mL) Serum Clot Activator SST Refrigerated
Alternate 2 4.0mL ( 0.5mL) Plasma EDTA (Lavender Top) Refrigerated
Instructions Specimen Stability: Room temperature: 24 hours, Refrigerated: 14 days (if serum/plasma is separated from cells)
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1 day  
CPT Code(s) 80204
Internal Comments 12/14/2016 - Edited to make viewable online. added stability, collection containers, and CPT code.  - JLS
1/1/21 from 80299 to 80204 -JK
2/24/2022 removed this from notes - JK
Reference Lab: St. Francis
St. Francis Test Code: 1349
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Chemistry