Specimen:
Collect
- One Red Top
Also Acceptable:
- One Green Top (Na Heparin)
- One Lavender (EDTA)
- One Pink Top (EDTA)
Submit
- 1 mL (Min:0.3 mL) Serum in Standard Transport Tube. Submit Ambient. Submit in a Standard Transport Tube.
Also Acceptable:
- 1 mL (Min:0.3 mL) Plasma in Standard Transport Tube. Submit Ambient. Submit in a Standard Transport Tube.
- 1 mL (Min:0.3 mL) Plasma in Standard Transport Tube. Submit Ambient. Submit in a Standard Transport Tube.
- 1 mL (Min:0.3 mL) Plasma in Standard Transport Tube. Submit Ambient. Submit in a Standard Transport Tube.
Special Handling
- Separate aliquot required for each frozen test ordered
Rejection Criteria
- Use of separator tubes
Stability
Ambient: 2 Week(s); Refrigerated: 2 Week(s); Frozen: 2 Week(s); Incubated: Unacceptable
Methodology
- Liquid Chromatography Tandem Mass Spectrometry
Performed
Varies
Reported
7-9 Day(s)
CPT Codes
- 80204
Components
- 91164 - METHOTREXATE, SERUM OR PLASMA
Last Updated: October 8, 2025 @ 9:13 am
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