Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzymatic Assay (EZA) (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Sample Type (-) Blood (1) (-) Fluid (1) Test Area Diagnostic Aids (2) Test Category Biomarkers (2) Test Sub-Category Barbiturates (4) (-) Small Molecule (2) Test Test Name 0420B Betahydroxybutyric Acid, Blood 0420FL Betahydroxybutyric Acid, Fluid