{"id":"methotrexate","name":"Methotrexate","shortName":"Methotrexate","aliases":["MTX","Methotrexate Level","Methotrexate, Serum","Methotrexate, Plasma","Methotrexate Serum Level","Methotrexate 24/48/72 Hour","Trexall","Rheumatrex","Otrexup","Rasuvo","Xatmep","Amethopterin"],"abbreviations":["MTX"],"loinc":[{"code":"14836-1","primary":true},{"code":"3793-7","primary":false},{"code":"51600-5","primary":false},{"code":"51611-2","primary":false},{"code":"51602-1","primary":false},{"code":"3795-2","primary":false},{"code":"3796-0","primary":false},{"code":"3797-8","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"umol/L","display":"µmol/L"},{"ucum":"nmol/L","display":"nmol/L"},{"ucum":"ng/mL","display":"ng/mL"},{"ucum":"ug/mL","display":"µg/mL"}],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures how much methotrexate is in your blood at a set time after a dose. It is mostly used to guide care after high-dose treatment.","url":"https://bloodtesttracker.com/markers/methotrexate","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}