Methotrexate Level

Message

Sendout, UCI test code: MTX

Test Code

LAB481

Alias/See Also

MTX

CPT Codes
80299

Preferred Specimen

2 mL serum from a red tube

Minimum Volume

1 mL

Other Acceptable Specimens

Green (sodium heparin), lavender (EDTA) also acceptable. Gel separator tubes are unacceptable.

Instructions

Always order STAT. Separate serum/plasma from cells as soon as possible. Refrigerated as soon as possible after collection and stored frozen (-20°C or colder) if NOT analyzed within 24 hours.

Transport Container

Aliquot vial

Transport Temperature

Frozen

Specimen Stability

Frozen (preferred): 3 months
Refrigerated: 1 week
Ambient: 4 hours

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Specimens that exceed stated stability, unlabeled/mislabeled/mismatched specimens, specimens submitted in leaking containers, tube with gel separator

Methodology
Enzyme Immunoassay (EMIT)

FDA Status
Approved

Setup Schedule

Daily

Report Available

STAT: 4-6 hours

Reference Range

Included with report

Performing Laboratory
UCI Medical Center, Orange, California

Additional Information
Methotrexate

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.