Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography/Mass Spectrometry (GC/MS) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) (-) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Serum or Plasma (2) Test Area (-) Therapeutics (2) Test Category Antiparkinsons (1) Dopamine Precursor (1) Test Sub-Category Other (1) Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma 4205SP Sinemet®, Serum/Plasma