3019648
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Methotrexate, Serum or Plasma

METHOTREX

Ordering Recommendation

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Plain red, lavender (K2EDTA), or green (sodium heparin)

Specimen Preparation

Transfer 1 mL serum or plasma to an ARUP standard transport tube. (Min: 0.3 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Room temperature. Also acceptable: Refrigerated or frozen.

Unacceptable Conditions

Polymer gel separation tube (SST or PST)

Remarks
Stability

Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 2 weeks

Methodology

Liquid Chromatography-Tandem Mass Spectrometry

Performed

Varies

Reported

6-8 days

Reference Interval

Interpretive Data



Compliance Category

Performed by non-ARUP Laboratory

Note

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
07/21/2025
X
N/A

CPT Codes

80204

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Components

Component Test Code* Component Chart Name LOINC
3019649 Methotrexate, Serum/Plasma 14836-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Rheumatrex
  • Trexall
  • MTX
Methotrexate, Serum or Plasma

LabCorp