Skip to main content
Go to homepage

Methotrexate

Centralized Core Laboratory : Chemistry

Test ID/Workstation :
MTX ACHM1
Specimen Type:
Blood
Tube Type:
Green top (lithium) heparin tube
Collection Volume:
3.0 mL (minimum 0.5 mL)
Storage:
Refrigerated, Frozen if testing is delayed
Availability:
Daily, 24 hours
Methodology:
Homogeneous Immunoassay
Special Instructions:
Specimen must be protected from light Specimen stable 2 weeks at 2-8 degrees Celsius; freeze for longer storage.
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:
80299
Synonyms:
Mexate