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