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Methotrexate

Centralized Core Laboratory : Chemistry

Test ID/Workstation :
MTX ACHM5
Specimen Type:
Blood
Tube Type:
Green top (lithium) heparin tube
Collection Volume:
3.0 mL (minimum 0.5 mL)
Storage:
Shipping- Send Refrigerated, protect from light; Storage-Refrigerated: 2 weeks; Frozen: up to 3 freeze/thaw cycles @ -10 degrees Celsius
Availability:
24 hours/day, 7 days/week
Methodology:
Roche-Homogeneous Immunoassay
Special Instructions:
Specimen must be protected from light
Lab/Phone:
330-543-8418
TAT:
4 hours
Additional Info:
Reference range:
  • Following a 4-6 hour infusion a patient with a 24 hr serum concentration of >5-10 umol/L, a 48 hr level of > 0.5-1.0 umol/L or a 72 hr level >0.2 umol/L is at increased risk for toxicity if conventional low dose leucovorin rescue is given.
  • CPT Code:
    80204
    Synonyms:
    Mexate