Oxazepam Quantitative, Serum or Plasma Oxcarbazepine or Eslicarbazepine Metabolite (MHD) Oxycodone/Oxymorphone Screen Only, Urine Oxycodone/Oxymorphone, Urine Screen with Reflex to Quantitation Orotic Acid and Orotidine, Urine Osmolality, Fecal Osmolality, Serum or Plasma Osmolality, Urine Osmotic Fragility, Erythrocyte Osteocalcin by Electrochemiluminescent Immunoassay Ova and Parasite Exam, Body Fluid or Urine Ova and Parasite Exam, Fecal (Immunocompromised or Travel History) Oxalate, Plasma
