Methotrexate, Sensitive
Ordering Recommendation
Monitor methotrexate concentration.
New York DOH Approval Status
Specimen Required
Plain Red. Also acceptable: Green (Sodium or Lithium Heparin), Lavender (EDTA), or Pink (K2EDTA).
Separate serum from cells ASAP or within 2 hours of collection. Transfer 3 mL serum to an ARUP Transport Tube. (Min: 1 mL)
Frozen.
Serum separator tubes.
After separation from cells: Ambient: 4 hours; Refrigerated: 2 weeks; Frozen: 6 months
Methodology
Quantitative Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
Reference Interval
Effective August 15, 2011
Therapeutic Range |
|
---|---|
Low dose | 0.50-1.00 µmol/L |
High dose/24 hours | 5.00 µmol/L or less |
48 hours | 0.50 µmol/L or less |
72 hours | 0.10 µmol/L or less |
Interpretive Data
FDA
Note
Hotline History
CPT Codes
80204
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
2005406 | Methotrexate, Sensitive | 14836-1 |
Aliases
- methotrexate concentration
- methotrexate drug level
- MTX