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) (2) Sample Type (-) Blood (1) (-) Serum or Plasma (1) Urine (1) Test Area (-) Drugs of Abuse (2) Exposure (6) Therapeutics (22) Test Category Opiates/Opioids (2) Test Sub-Category (-) Other (2) Stimulants (2) Synthetic Cannabinoids (2) Test Test Name 4127B Suboxone® - Free, Blood 4127SP Suboxone® - Free, Serum/Plasma