91164 Methotrexate - Interpath Laboratory, Inc.

91164 Methotrexate

Specimen:

Collect:

One 10 mL Red Top

Also Acceptable
Two 4 mL Lavender (EDTA)
Two 4 mL Green Top (Li Heparin)
Two 4 mL Gray Top

Submit:

3 mL (Min:2 mL) Serum. Submit Frozen. Submit in a Standard Transport Tube.

Also Acceptable
3 mL (Min:2 mL) Plasma. Submit Frozen. Submit in a Standard Transport Tube.

Special Handling:

Protect from Light
Separate from cells ASAP

Rejection Criteria:

Use of separator tubes

Stability:

Ambient: 4 Hour(s); Refrigerated: 24 Hour(s); Frozen: 6 Month(s); Incubated: Unacceptable

Methodology:

Fluorescence Polarization Immunoassay (FPIA); Immunoassay

Performed:

Sun-Sat

Reported:

2-3 Day(s)

CPT Codes:

80299 - TDM Unlisted

Interpretive Data:

General Reference Range : 0.50-1.00
Therapeutic range: Low Dose: 0.50-1.00 umol/L High dose - 24 hrs: <=5.00 umol/L 48 hrs: <=0.50 umol/L 72 hrs: <=0.10 umol/L