METHOTREXATE

Test Code

MTX

Alias/See Also

Methotrex, Rheumatrex, Trexall, Otrexup, Rasuvo

CPT Codes
80204

Preferred Specimen

Serum

Minimum Volume

1 mL

Other Acceptable Specimens

Plasma from heparin tube

Instructions

Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.

Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.

Transport Temperature

Refrigerated

Specimen Stability

Room Temperature = 48 hours
Refrigerated = 14 days
Frozen = 12 months

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

Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.

Methodology
Homogeneous Enzyme Immunoassay

Setup Schedule

24/7
MVCHEM

Report Available

Daily

Performing Laboratory
CompuNet Clinical Laboratories, LLC
Location: Miami Valley Hospital
1 Wyoming St
Dayton, OH 45409

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.