Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (2) (-) Enzyme Immunoassay (EIA) (2) Gas Chromatography (GC) (5) Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (23) Sample Type Urine (2) Test Area Therapeutics (2) Test Category (-) Analgesics (2) Stimulants (1) Test Sub-Category Opiates/Opioids (2) Test Test Name 9324U Methadone Screen, Urine 9444U Meperidine Screen, Urine