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HelpCatalog ID Mtrex Methotrexate
CPOE Test Name
Methotrexate Level
Synonyms
Mtrex Lvl
Specimen Type
Serum
Specimen Requirements
Red top tube only; 2 mL blood
Storage and Transport
Protect from light and deliver on ice. Hand directly to Receiving Laboratory staff.
Causes for Rejection
Wrong container; not on ice; not protected from light; improper labeling; insufficient quantity; delay in transport
Special Instructions
Alert lab at 706-721-2120 before collecting specimen. The lab must be notified prior to dosing the patient with the estimated arrival time of the first specimen. For subsequent specimens, please notify the lab prior to drawing the specimens. Cannot be shared with other tests.
Reference Values
Variable therapeutic range
Critical Values
Toxic limit ≥ 5.0 mcmol/L
Performing Lab
Core Laboratory, AD 3301, 706-721-2120
Turn Around Time
Urgent/Emergent 1 hour (a possible increase in TAT may be expected for elevated results)
CPT / HCPCS Code
80299