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 (-) Blood (1) Serum or Plasma (1) Urine (2) Test Area Therapeutics (1) Test Category (-) Analgesics (1) Test Sub-Category NSAIDs (1) (-) Opiates/Opioids (1) Test Test Name 8661B Codeine and Metabolite - Free (Unconjugated), Blood